summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/source/latex/hyperxmp/hyperxmp.dtx
blob: a2cc59e97f88d170a77f90502b1608e91542bfad (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
% \iffalse meta-comment
%
% Copyright (C) 2011--2020 by Scott Pakin <scott+hyxmp@pakin.org>
% ---------------------------------------------------------------
%
% This file may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in:
%
%    http://www.latex-project.org/lppl.txt
%
% and version 1.3c or later is part of all distributions of LaTeX
% version 2008/05/04 or later.
%
% \fi
%
% \iffalse
%<*driver>
\ProvidesFile{hyperxmp.dtx}
%</driver>
%<package>\NeedsTeXFormat{LaTeX2e}[1999/12/01]
%<package>\ProvidesPackage{hyperxmp}
%<*package>
    [2020/04/08 v5.1 Store hyperref metadata in XMP format]
%</package>
%
%<*driver>
\bgroup
  \catcode`\&=11
  \gdef\levelchar{&}
\egroup
\documentclass{ltxdoc}
\usepackage[T1]{fontenc}
\usepackage[english]{babel}
\usepackage{graphicx}
\usepackage[cmyk]{xcolor}
\usepackage{tocbibind}
\usepackage{microtype}
\usepackage{needspace}
\usepackage{varioref}
\usepackage{alltt}
\usepackage{multicol}
\usepackage{makeidx}
\usepackage{mmap}
\usepackage{enumitem}
\usepackage{booktabs}
\usepackage{marginfix}
\usepackage{ifmtarg}
\usepackage{iftex}
\input{hyperxmp-stds}
\expandafter\ifx\csname wantpdfstandards\endcsname\relax
  \usepackage{hyperref}
\else
  \usepackage[pdfa]{hyperref}
\fi
\usepackage{hyperxmp}
\EnableCrossrefs
\CodelineIndex
\RecordChanges

% Specify this document's metadata.
\GetFileInfo{hyperxmp.dtx}
\title{The \pkgname{hyperxmp} package\thanks{This document
  corresponds to \pkgname{hyperxmp}~\fileversion, dated \filedate.}}
\author{Scott Pakin \\ \texttt{scott+hyxmp@pakin.org}}
\makeatletter
\edef\versionnumber{\expandafter\@gobble\fileversion}  % Drop the "v" in the file version.
\makeatother
\hypersetup{%
  pdfauthor={Scott Pakin},
  pdftitle={The hyperxmp package},
  pdfsubject={LaTeX2e support for XMP metadata},
  pdfkeywords={LaTeX, embedded metadata, XMP, PDF, copyright, license, comments},
  pdfcopyright={Copyright (C) 2011-2020, Scott Pakin},
  pdflicenseurl={http://www.latex-project.org/lppl/},
  pdfcaptionwriter={Scott Pakin},
  pdfcontactemail={scott+hyxmp@pakin.org},
  pdfcontacturl={http://www.pakin.org/\xmptilde scott/},
  pdfversionid={\versionnumber},
  pdflang={en-US},
  pdftrapped={False},
  pdfstartpage={},
  pdfurl={http://mirror.ctan.org/macros/latex/contrib/hyperxmp/hyperxmp.pdf},
  baseurl={http://mirror.ctan.org/macros/latex/contrib/hyperxmp/}
}

% Specify some additional hyperref configuration.
\hypersetup{%
  unicode,
  bookmarksopen,
  bookmarksopenlevel=2,
  bookmarksnumbered
}

\begin{document}
  \DocInput{hyperxmp.dtx}
  \Needspace{10\baselineskip}
  \phantomsection\addcontentsline{toc}{section}{Change History}
  \PrintChanges
  \makeatletter
  \let\orig@index@prologue=\index@prologue
  \def\index@prologue{%
    \phantomsection\addcontentsline{toc}{section}{Index}
    \orig@index@prologue
  }%
  \makeatother
  \Needspace{12\baselineskip}
  \PrintIndex
\end{document}
%</driver>
% \fi
%
% \CheckSum{2354}
%
% \CharacterTable
%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%   Digits        \0\1\2\3\4\5\6\7\8\9
%   Exclamation   \!     Double quote  \"     Hash (number) \#
%   Dollar        \$     Percent       \%     Ampersand     \&
%   Acute accent  \'     Left paren    \(     Right paren   \)
%   Asterisk      \*     Plus          \+     Comma         \,
%   Minus         \-     Point         \.     Solidus       \/
%   Colon         \:     Semicolon     \;     Less than     \<
%   Equals        \=     Greater than  \>     Question mark \?
%   Commercial at \@     Left bracket  \[     Backslash     \\
%   Right bracket \]     Circumflex    \^     Underscore    \_
%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%   Right brace   \}     Tilde         \~}
%
%
% \changes{v1.0}{2006/05/14}{Initial version}
% \changes{v2.0}{2012/08/02}{Heiko Oberdiek's major rewrite of the code
%   to better support native-Unicode \string\TeX\ implementations
%   (\string\XeTeX\ and \string\LuaTeX)}
% \changes{v2.0}{2012/08/26}{Added support for the \protect\acro{XMP} Basic
%   schema and miscellaneous other bits of metadata}
% \changes{v1.2}{2010/06/04}{Added support for the \protect\XeTeX\ backend
%   (\texttt{xdvipdfmx})}
% \changes{v1.2}{2010/06/07}{Added support for the Photoshop schema}
% \changes{v2.2}{2010/12/06}{Added support for the \protect\acro{IPTC} Photo Metadata schema}
% \changes{v2.4}{2013/12/21}{Added support for the \protect\acro{PDF/A}
%   Identification schema, as requested by Florian Breitwieser}
% \changes{v2.5}{2014/06/19}{Enabled ``\texttt{\string\string\string\_}''
%   to work within email addresses, as requested by Leonid Sinev}
% \changes{v2.6}{2014/09/24}{Added support for a new \protect\optname{pdfdate}
%   key to explicitly specify the document date (and optionally time)}
% \changes{v2.9}{2016/04/25}{Force inclusion of \protect\xmpprop{dc:creator},
%   \protect\xmpprop{dc:title}, and \protect\xmpprop{dc:description}---even if
%   empty---when \protect\pkgname{hyperref} is loaded with the
%   \protect\optname{pdfa} option (suggested by Leonid Sinev)}
% \changes{v2.9}{2016/04/26}{Introduced the \protect\optname{pdftype}
%   package option, which enables an author to specify the type of
%   document being produced}
% \changes{v3.0}{2016/07/02}{Made the code compatible with \string\LuaTeX~0.85.
%   Thanks to Robert Schlicht, Leonid Sinev, and David Carlisle for bug
%   reports and to Leonid Sinev for helping test the new
%   \protect\pkgname{hyperxmp} code}
% \changes{v3.4}{2017/11/04}{Use \protect\pkgname{ifmtarg} to test for
%   empty arguments, including non-empty but all spaces}
% \changes{v4.0}{2019/03/14}{Include all metadata within a single
%   \protect\xmpterm{rdf:Description} block}
% \changes{v4.1}{2019/04/05}{Updated the documentation to refer to
%   \protect\cs{pdfnumpages} by its correct name.  Thanks to Volker RW Schaa
%   for catching the discrepancy}
% \changes{v5.0}{2020/02/15}{Added support for \protect\acro{PDF/UA}
%   standards, as requested by Robin Schwab}
% \changes{v5.0}{2020/02/26}{Added support for \protect\acro{PDF/X}
%   standards, as requested by Robin Schwab}
%
% ^^A \GetFileInfo{hyperxmp.dtx}
%
% \DoNotIndex{\,,\&,\ ,\!,\",\#,\(,\),\*,\<,\>,\\,\^,\~,\^,\_}
% \DoNotIndex{\@cons,\@empty,\@firstofone,\@firstoftwo,\@gobble,\@gobbletwo}
% \DoNotIndex{\@ifpackageloaded,\@ifundefined,\@nil,\@secondoftwo}
% \DoNotIndex{\@tempcnta,\@tempcntb,\MessageBreak,\advance,\afterassignment}
% \DoNotIndex{\aftergroup,\begin,\begingroup,\bgroup,\catcode,\csname,\def}
% \DoNotIndex{\divide,\edef,\egroup,\else,\end,\endcsname,\endgroup}
% \DoNotIndex{\expandafter,\fi,\futurelet,\g@addto@macro,\gdef,\global,\if}
% \DoNotIndex{\ifcase,\ifnum,\ifx,\immediate,\lccode,\let,\loop,\lowercase}
% \DoNotIndex{\multiply,\newcommand,\noexpand,\or,\relax,\repeat,\space}
% \DoNotIndex{\string,\the,\toks,\uccode,\uppercase,\usepackage,\xdef}
%
% ^^A  Define a few logical styles.
% \DeclareRobustCommand{\term}[1]{#1\SortIndex{#1}{#1}}
% \DeclareRobustCommand{\pkgname}[1]{\mbox{\textsf{#1}}\SortIndex{#1}{\textsf{#1}}}
% \makeatletter
% \DeclareRobustCommand{\xmpprop}[2][]{^^A   XMP property
%   \def\xmppropopt{#1}^^A
%   \ifx\xmppropopt\@empty
%     \mbox{\textsf{#2}}^^A
%   \else
%     \mbox{\textsf{#2}}.\mbox{\textsf{#1}}^^A
%     \SortIndex{#1}{\textsf{#1}}^^A
%   \fi
%   \SortIndex{#2}{\textsf{#2}}^^A
%   \index{properties, \acrostyle{XMP}&#2=\textsf{#2}}^^A
% }
% \DeclareRobustCommand{\xmpterm}[1]{^^A     All other XMP terms
%   \mbox{\textsf{#1}}^^A
%   \SortIndex{#1}{\textsf{#1}}^^A
% }
% \makeatother
% \index{XMP=\acrostyle  {XMP}&properties|see{properties, \acrostyle{XMP}}}
% \DeclareRobustCommand{\pdfterm}[1]{\mbox{\textsf{#1}}\SortIndex{#1}{\textsf{#1}}}
% \DeclareRobustCommand{\cmdname}[1]{\mbox{\texttt{#1}}\SortIndex{#1}{\texttt{#1}}}
% \DeclareRobustCommand{\optname}[1]{^^A
%   \mbox{\textsf{#1}}^^A
%   \SortIndex{#1}{\textsf{#1} (option)}^^A
%   \index{options&#1=\textsf{#1}}^^A
% }
% ^^A  \moptname is the same as \optname but additionally typesets the
% ^^A  option name in the margin.
% \DeclareRobustCommand{\moptname}[1]{^^A
%   \optname{#1}^^A
%   \marginpar{\raggedleft\strut\mbox{\textsf{#1}}}^^A
% }
% \DeclareRobustCommand{\acrostyle}[1]{\textsc{\MakeLowercase{#1}}}
% \DeclareRobustCommand{\acro}[1]{^^A
%   \mbox{\acrostyle{#1}}^^A
%   \SortIndex{#1}{\acrostyle{#1}}^^A
% }
% \newcounter{note}
% \newcommand{\usagenote}[1]{^^A
%   \refstepcounter{note}^^A
%   \paragraph{Note~\thenote: #1}%
% }
%
% ^^A  Define some other shortcut macros.
% \DeclareRobustCommand{\tex}{^^A
%   \texorpdfstring{\TeX\SortIndex{TeX}{\TeX}}{TeX}^^A
% }
% \DeclareRobustCommand{\XeTeXlogo}{^^A
%   X\lower0.5ex\hbox{\kern-.15em\reflectbox{E}}\kern-0.1667em\TeX
% }
% \DeclareRobustCommand{\XeTeX}{^^A
%   \texorpdfstring{\XeTeXlogo\SortIndex{XeTeX}{\XeTeXlogo}}{XeTeX}^^A
% }
% \DeclareRobustCommand{\XeLaTeXlogo}{^^A
%   X\lower0.5ex\hbox{\kern-.15em\reflectbox{E}}\kern-0.1667em\LaTeX
% }
% \DeclareRobustCommand{\XeLaTeX}{^^A
%   \texorpdfstring{\XeLaTeXlogo\SortIndex{XeLaTeX}{\XeLaTeXlogo}}{XeLaTeX}^^A
% }
% \DeclareRobustCommand{\LuaTeXlogo}{Lua\TeX}
% \DeclareRobustCommand{\LuaTeX}{^^A
%   \texorpdfstring{\LuaTeXlogo\SortIndex{LuaTeX}{\LuaTeXlogo}}{LuaTeX}^^A
% }
% \DeclareRobustCommand{\LuaLaTeXlogo}{Lua\LaTeX}
% \DeclareRobustCommand{\LuaLaTeX}{^^A
%   \texorpdfstring{\LuaLaTeXlogo\SortIndex{LuaLaTeX}{\LuaLaTeXlogo}}{LuaLaTeX}^^A
% }
% \DeclareRobustCommand{\pdfTeXlogo}{pdf\TeX}
% \DeclareRobustCommand{\pdfTeX}{^^A
%   \texorpdfstring{\pdfTeXlogo\SortIndex{pdfTeX}{\pdfTeXlogo}}{pdfTeX}^^A
% }
% \DeclareRobustCommand{\pdfLaTeXlogo}{pdf\LaTeX}
% \DeclareRobustCommand{\pdfLaTeX}{^^A
%   \texorpdfstring{\pdfLaTeXlogo\SortIndex{pdfLaTeX}{\pdfLaTeXlogo}}{pdfLaTeX}^^A
% }
% \DeclareRobustCommand{\Dvips}{^^A
%   \texorpdfstring{Dvips\SortIndex{dvips}{\texttt{dvips}}}{Dvips}^^A
% }
% \DeclareRobustCommand{\Lua}{^^A
%   Lua\index{Lua}^^A
% }
%
% ^^A  Define an environment just like macro but for Lua functions.
% \makeatletter
% \newenvironment{luafunc}{^^A
%   \begingroup
%     \catcode`\_=11
%     \def\PrintMacroName##1{\strut\MacroFont\string##1\ }^^A
%     \def\SpecialIndex@##1##2{^^A
%       \@bsphack
%       \special@index{\string##1\actualchar
%         \string\verb\quotechar*\verbatimchar##1\verbatimchar##2}^^A
%       \@esphack
%     }^^A
%     \begin{macro}^^A
% }{^^A
%     \end{macro}^^A
%   \endgroup
% }
% \makeatother
%
% ^^A  Typeset a PDF standard name, indexing only the standard type but
% ^^A  not the subtype or year.
% \makeatletter
% \newcommand*{\PDFstd}[4]{^^A
%   \mbox{^^A
%     \acro{PDF/#1}-\oldstylenums{#2}^^A
%     #3^^A
%     \@ifnotmtarg{#4}{:\oldstylenums{#4}}^^A
%   }^^A
% }
% \makeatother
%
% ^^A  Pack figures a bit tighter onto the page.
% \renewcommand{\floatpagefraction}{0.8}
%
% ^^A  Help \pageref refer to arbitrary content.
% \newcounter{pagelabel}
%
% \maketitle
% \sloppy
%
% \begin{abstract}
%   \pkgname{hyperxmp} makes it easy for an author to include \acro{XMP}
%   metadata in a \acro{PDF} document produced by \LaTeX\@.  \pkgname{hyperxmp}
%   integrates seamlessly with \pkgname{hyperref} and requires virtually
%   no modifications to a document that already specifies document
%   metadata through \pkgname{hyperref}'s mechanisms.
% \end{abstract}
%
% \section{Introduction}
%
% Adobe Systems, Inc.\ has been promoting
% \acro{XMP}~\cite{Adobe2012:XMP}---eXtensible Metadata Platform---as a
% standard way to include metadata within a document.  The idea behind
% \acro{XMP} is that it is an \acro{XML}-based description of various
% document attributes and is embedded as uncompressed, unencoded text
% within the document it describes.  By storing the metadata this way it
% is independent of the document's file format.  That is, regardless of
% whether a document is in \acro{PDF}, \acrostyle{JPEG},
% \acrostyle{HTML}, or any other format, it is trivial for a program (or
% human) to locate, extract, and---using any standard \acro{XML}
% parser---process the embedded \acro{XMP} metadata.
%
% As of this writing there are few tools that actually do process
% \acro{XMP}\@.  However, it is easy to imagine future support existing
% in file browsers for displaying not only a document's filename but
% also its title, list of authors, description, and other metadata.
%
% \paragraph{This is too abstract!  Give me an example.}
% Consider a \LaTeX\ document with three authors---Jack Napier, Edward
% Nigma, and Harvey Dent---named in the \LaTeX\ source in the usual way:
% ``\verb|\author{|\texttt{Jack Napier \cs{and} Edward Nigma \cs{and}
%   Harvey Dent}\verb|}|''.  With \pkgname{hyperxmp}, the generated
% \acro{PDF} file will contain, among other information, the following
% stanza of \acro{XMP} code embedded within it:
%
% \begin{verbatim}
%    <dc:creator>
%      <rdf:Seq>
%        <rdf:li>Jack Napier</rdf:li>
%        <rdf:li>Edward Nigma</rdf:li>
%        <rdf:li>Harvey Dent</rdf:li>
%      </rdf:Seq>
%    </dc:creator>
% \end{verbatim}
%
% In the preceding code, the |dc| namespace refers to the
% \href{http://purl.org/DC/}{Dublin Core schema}, a collection of
% metadata properties.  The \xmpprop{dc:creator} property surrounds the
% list of authors.  The \textsf{rdf} namespace is the
% \href{http://www.w3.org/RDF/}{Resource Description Framework}, which
% defines \xmpterm{rdf:Seq} as an ordered list of values.  Each author
% is represented by an individual list item (\xmpterm{rdf:li}), making
% it easy for an \acro{XML} parser to separate the authors' names.
%
% Remember that \acro{XMP} code is stored as \emph{metadata}.  It does
% not appear when viewing or printing the \acro{PDF} file.  Rather, it
% is intended to make it easy for computer applications to identify and
% categorize the document.
%
% \paragraph{What metadata does \textsf{hyperxmp} process?}
% \pkgname{hyperxmp} knows how to embed all of the following types of
% metadata within a document:
%
% \label{page:begin-metadata-list}
% \begin{itemize} \raggedright
%   \item address of primary author
%     (\xmpprop[CiAdrExtadr]{Iptc4xmpCore:CreatorContactInfo},
%     \xmpprop[CiAdrCity]{Iptc4xmpCore:CreatorContactInfo},
%     \xmpprop[CiAdrRegion]{Iptc4xmpCore:CreatorContactInfo},
%     \xmpprop[CiAdrPcode]{Iptc4xmpCore:CreatorContactInfo}, and
%     \xmpprop[CiAdrCtry]{Iptc4xmpCore:CreatorContactInfo})
%   \item author(s) (\xmpprop{dc:creator})
%   \item base \acro{URL} for relative references (\xmpprop{xmp:BaseURL})
%   \item book edition (\xmpprop{prism:bookEdition})
%   \item copyright (\xmpprop{dc:rights} and \xmpprop{xmpRights:Marked})
%   \item date (\xmpprop{dc:date}, \xmpprop{xmp:CreateDate},
%     \xmpprop{xmp:ModifyDate}, and \xmpprop{xmp:MetadataDate})
%   \item \acro{DOI} (\xmpprop{prism:doi})
%   \item email address(es) of primary author (\xmpprop[CiEmailWork]{Iptc4xmpCore:CreatorContactInfo})
%   \item file format (\xmpprop{dc:format})
%   \item file name of main \LaTeX\ source file (\xmpprop{dc:source})
%   \item file size in bytes (\xmpprop{prism:byteCount})
%   \item \acro{ISBN} (\xmpprop{prism:isbn})
%   \item \acro{ISSN}---both print (\xmpprop{prism:issn}) and electronic (\xmpprop{prism:eIssn})
%   \item issue number of parent publication (\xmpprop{prism:number})
%   \item keywords (\xmpprop{pdf:Keywords} and \xmpprop{dc:subject})
%   \item language used (\xmpprop{dc:language})
%   \item license \acro{URL} (\xmpprop{xmpRights:WebStatement})
%   \item metadata writer (\xmpprop{photoshop:CaptionWriter})
%   \item page count (\xmpprop{prism:pageCount})
%   \item page range(s) (\xmpprop{prism:pageRange})
%   \item \acro{PDF} version (\xmpprop{pdf:PDFVersion})
%   \item \acro{PDF}-generating tool (\xmpprop{pdf:Producer} and \xmpprop{xmp:CreatorTool})
%   \item \acro{PDF/A} version and conformance level (\xmpprop{pdfaid:part} and \xmpprop{pdfaid:conformance})
%   \item \acro{PDF/UA} version (\xmpprop{pdfuaid:part})
%   \item \acro{PDF/X} standard compliance (\xmpprop{pdfxid:GTS\_PDFXVersion})
%   \item position/title of primary author (\xmpprop{photoshop:AuthorsPosition})
%   \item publication name of parent publication (\xmpprop{prism:publicationName})
%   \item publisher of the document (\xmpprop{dc:publisher})
%   \item rendition variation of the document (\xmpprop{xmpMM:RenditionClass})
%   \item summary (\xmpprop{dc:description})
%   \item subtitle (\xmpprop{prism:subtitle})
%   \item telephone number(s) of primary author (\xmpprop[CiTelWork]{Iptc4xmpCore:CreatorContactInfo})
%   \item title (\xmpprop{dc:title})
%   \item trapping of colors (\xmpprop{pdf:trapped})
%   \item type of document (\xmpprop{dc:type})
%   \item type of parent publication (\xmpprop{prism:aggregationType})
%   \item \acro{URL} of the document (\xmpprop{prism:url})
%   \item \acro{URL}(s) of the primary author (\xmpprop[CiUrlWork]{Iptc4xmpCore:CreatorContactInfo})
%   \item \acro{UUID} for the document (\xmpprop{xmpMM:DocumentID})
%   \item \acro{UUID} for the document instance (\xmpprop{xmpMM:InstanceID})
%   \item version identifier for the document (\xmpprop{xmpMM:VersionID})
%   \item volume number of parent publication (\xmpprop{prism:volume})
% \end{itemize}
% \label{page:end-metadata-list}
%
% \noindent
% More types of metadata may be added in a future release.
%
% \paragraph{How does \textsf{hyperxmp} compare to the \textsf{xmpincl}
% package?}
% The short answer is that \pkgname{xmpincl} is more flexible but
% \pkgname{hyperxmp} is easier to use.  With \pkgname{xmpincl}, the
% author manually constructs a file of arbitrary \acro{XMP} data and the
% package merely embeds it within the generated \acro{PDF} file.  With
% \pkgname{hyperxmp}, the author specifies values for various predefined
% metadata types and the package formats those values as \acro{XMP} and embeds
% the result within the generated \acro{PDF} file.
%
% \pkgname{xmpincl} can embed \acro{XMP} only when running under \pdfLaTeX\ and
% only when in \acro{PDF}-generating mode.  \pkgname{hyperxmp} additionally
% works with a few other \acro{PDF}-producing \LaTeX\ backends.
%
% \pkgname{hyperxmp} and \pkgname{xmpincl} can complement each other.
% An author may want to use \pkgname{hyperxmp} to produce a basic set of
% \acro{XMP} code, then extract the \acro{XMP} code from the \acro{PDF} file with a text
% editor, augment the \acro{XMP} code with any metadata not supported by
% \pkgname{hyperxmp}, and use \pkgname{xmpincl} to include the modified
% \acro{XMP} code in the \acro{PDF} file.
%
% \section{Usage}
%
% \pkgname{hyperxmp} works by postprocessing some of the package options
% honored by \pkgname{hyperref}.  To use \pkgname{hyperxmp}, merely put
% a |\usepackage{hyperxmp}| in your document's preamble.  That line can
% appear anywhere before the \pkgname{hyperref} \acro{PDF} options are
% specified (i.e.,~with either |\usepackage[|\dots|]{hyperref}| or
% |\hypersetup{|\dots|}|).  \pkgname{hyperxmp} will construct its
% \acro{XMP} data using the following \pkgname{hyperref} options:
%
% \begin{multicols}{3}
%   \raggedcolumns
%   \begin{itemize}
%   \item \optname{baseurl}
%   \item \optname{pdfauthor}
%   \item \optname{pdfcreationdate}
%   \item \optname{pdfkeywords}
%   \item \optname{pdflang}
%   \item \optname{pdfmoddate}
%   \item \optname{pdfproducer}
%   \item \optname{pdfsubject}
%   \item \optname{pdftitle}
%   \item \optname{pdftrapped}
%   \end{itemize}
% \end{multicols}
%
% \noindent
% \mbox{}\label{page:begin-new-options}
% \pkgname{hyperxmp} instructs \pkgname{hyperref} also to accept the
% following options, which have meaning only to \pkgname{hyperxmp}:
%
% \begin{multicols}{3}
%   \raggedcolumns
%   \begin{itemize}
%   \item \optname{pdfaconformance}
%   \item \optname{pdfapart}
%   \item \optname{pdfauthortitle}
%   \item \optname{pdfbookedition}
%   \item \optname{pdfbytes}
%   \item \optname{pdfcaptionwriter}
%   \item \optname{pdfcontactaddress}
%   \item \optname{pdfcontactcity}
%   \item \optname{pdfcontactcountry}
%   \item \optname{pdfcontactemail}
%   \item \optname{pdfcontactphone}
%   \item \optname{pdfcontactpostcode}
%   \item \optname{pdfcontactregion}
%   \item \optname{pdfcontacturl}
%   \item \optname{pdfcopyright}
%   \item \optname{pdfdate}
%   \item \optname{pdfdocumentid}
%   \item \optname{pdfdoi}
%   \item \optname{pdfeissn}
%   \item \optname{pdfinstanceid}
%   \item \optname{pdfisbn}
%   \item \optname{pdfissn}
%   \item \optname{pdfissuenum}
%   \item \optname{pdflicenseurl}
%   \item \optname{pdfmetadate}
%   \item \optname{pdfmetalang}
%   \item \optname{pdfnumpages}
%   \item \optname{pdfpagerange}
%   \item \optname{pdfpublication}
%   \item \optname{pdfpublisher}
%   \item \optname{pdfpubtype}
%   \item \optname{pdfrendition}
%   \item \optname{pdfsource}
%   \item \optname{pdfsubtitle}
%   \item \optname{pdftype}
%   \item \optname{pdfuapart}
%   \item \optname{pdfurl}
%   \item \optname{pdfversionid}
%   \item \optname{pdfvolumenum}
%   \item \optname{pdfxstandard}
%   \end{itemize}
% \end{multicols}
% \label{page:end-new-options}
%
%
% \subsection{Option descriptions}
%
% The document title is specified as normal for \pkgname{hyperref} with
% \moptname{pdftitle}, but see Note~\ref{note:multilingual} on
% page~\pageref{note:multilingual} for instructions on how to specify a
% title in multiple languages.  If \optname{pdftitle} is not specified
% it will inherit its value from the document's \cs{title}.
% \pkgname{hyperxmp} introduces a complementary \moptname{pdfsubtitle}
% option:
%
% \begin{verbatim}
%   pdftitle={Frankenstein},
%   pdfsubtitle={The Modern Prometheus},
% \end{verbatim}
%
% Unfortunately, the subtitle can appear in only one language.  It
% assumed to be the same language as the document language
% (\optname{pdflang}) but can be overridden by preceding the text with a
% bracketed \acro{ISO} \mbox{639-1} two-letter language code and an
% optional \acro{ISO} \mbox{3166-1} two-letter region code.  See the
% example below for \optname{pdfpublication}.
%
% \pkgname{hyperref}'s \moptname{pdfauthor} option specifies the
% document's author(s).  See Note~\ref{note:literal-commas} on
% page~\pageref{note:literal-commas} for a discussion of the correct
% syntax.  If \optname{pdfauthor} is not specified it will inherit its
% value from the document's \cs{author}.  \moptname{pdfauthortitle}
% indicates the primary author's position or title.
% \moptname{pdfcaptionwriter} specifies the name of the person who added
% the metadata to the document.
%
% The next eight items describe how to contact the person or institution
% responsible for the document (the ``contact'').
% \moptname{pdfcontactaddress} is the contact's street address and can
% include the institution name if the contact is an institution;
% \moptname{pdfcontactcity} is the contact's city;
% \moptname{pdfcontactcountry} is the contact's country;
% \moptname{pdfcontactemail} is the contact's email address (or
% multiple, comma-separated email addresses); \moptname{pdfcontactphone}
% is the contact's telephone number (or multiple, comma-separated
% telephone numbers); \moptname{pdfcontactpostcode} is the contact's
% postal code; \moptname{pdfcontactregion} is the contact's state or
% province; and \moptname{pdfcontacturl} is the contact's \acro{URL} (or
% multiple, comma-separated \acro{URL}s).
%
% \Needspace{2\baselineskip}
% \moptname{pdfcopyright} defines the copyright text, and
% \moptname{pdflicenseurl} identifies a \acro{URL} that points to the
% document's license agreement.
%
% \moptname{pdfmetalang} indicates the natural language in which certain
% metadata---specifically, the document's title, subject, and copyright
% statement---are written.  The language should be specified using an
% \acro{IETF} language tag~\cite{IANA2011:lang-tags}, for example,
% ``|en|'' for English, ``|en-US|'' for specifically United States
% English, ``|de|'' for German, and so forth.  If \optname{pdfmetalang}
% is not specified, \pkgname{hyperxmp} assumes the metadata language is
% the same as the document language (\pkgname{hyperref}'s
% \moptname{pdflang} option).  If neither \optname{pdfmetalang} nor
% \optname{pdflang} is specified, \pkgname{hyperxmp} uses only
% ``|x-default|'' as the metadata language.  Note that ``|x-default|''
% metadata are always included in addition to the specified metadata
% language, as the user reading the document may not have specified a
% language preference.
%
% \acro{XMP} can include a universally unique identifier (\acro{UUID})
% for each document and for each instance of a given document.  By
% default, \pkgname{hyperxmp} assigns a version~4 (i.e.,~pseudorandom)
% \acro{UUID}~\cite{Leach2005:uuid} for each of these.  However, a
% document can alternatively specify a particular document identifier
% using \moptname{pdfdocumentid} and (not normally recommended) a
% particular instance identifier using \moptname{pdfinstanceid}.  These
% should be of the form
% \texttt{uuid:}\textit{xxxxxxxx}\texttt{-}\textit{xxxx}\texttt{-}\textit{xxxx}\texttt{-}\textit{xxxx}\texttt{-}\textit{xxxxxxxxxxxx},
% where ``\textit{x}'' is a lowercase hexadecimal number.  For example,
% \texttt{uuid:53ab7f19-a48c-5177-8bb2-403ad907f632} is a valid argument
% to \optname{pdfdocumentid} (or \optname{pdfinstanceid}).  See Leach,
% Mealling, and Salz's \acro{UUID} specification document for details on
% how to produce the various forms of
% \acro{UUID}s~\cite{Leach2005:uuid}.  A more freeform mechanism than
% \optname{pdfinstanceid} for versioning documents is available via
% \moptname{pdfversionid}.  The version specified by
% \optname{pdfversionid} can be incremented as~|1|, |2|, |3|,~\dots;
% identified with a hierarchical numbering scheme (e.g.,~this document
% is versioned \texttt{\versionnumber} to match the package version); or
% labeled using any other approach.  One possibility is to use a
% revision number or commit hash from the version-control software
% maintaining the document.  For example, the |\gitVer| macro from the
% \pkgname{gitver} package is an expandable (see
% Note~\ref{note:expandable} on page~\pageref{note:expandable}) version
% of the current \href{https://git-scm.com/}{Git} hash that can suitably
% be passed to \optname{pdfversionid}.  If not specified,
% \optname{pdfversionid} defaults to~|1|.
%
% Already-published documents can be identified in a number of ways.
% \moptname{pdfisbn} specifies the \acro{ISBN}.  \moptname{pdfissn}
% refers to the \acro{ISSN} of the \emph{print} version of the document
% while \moptname{pdfeissn} refers to the \acro{ISSN} of the
% \emph{electronic} version of the document.  \moptname{pdfdoi}
% specifies the \acro{DOI} and should include only the \acro{DOI} name
% without any \acro{URL} prefix.  For example, specify
% |pdfdoi={10.1145/3149526.3149532}|, \emph{not}
% |pdfdoi={https://doi.org/10.1145/3149526.3149532}|.
% \moptname{pdfurl} points to the complete \acro{URL} for the document.
% In contrast, \moptname{baseurl} points one level up and is used to
% resolve relative \acro{URL}s.
%
% Already-published documents can further be identified by the
% publication in which they appear.  \moptname{pdfpublication} specifies
% the title of the journal, magazine, or other parent document.  The
% title language is assumed to be the same as the document language
% (\optname{pdflang}) but can be overridden by preceding the text with a
% bracketed \acro{ISO} \mbox{639-1} two-letter language code and an
% optional \acro{ISO} \mbox{3166-1} two-letter region code.  For
% example, |pdfpublication={[fr]Charlie Hedbo}| indicates a
% French-language title.  Were the language or pronunciation differences
% significant, |fr-FR| would indicate specifically the French spoken in
% France, as opposed to that spoken in, say, Canada (|fr-CA|) or Belgium
% (|fr-BE|).  The publisher itself can be named using
% \moptname{pdfpublisher}.
%
% \moptname{pdfpubtype} indicates the type of publication in which the
% document was published.  This should be one of the \acro{PRISM}
% aggregation types~\cite{PRISM2012:cont-voc} such as |book|, |journal|,
% |magazine|, |manual|, |report|, or |whitepaper|.  For publications in
% journals, magazines, and similar periodicals, a document can specify
% the volume number with \moptname{pdfvolumenum} and the issue number
% within the volume with \moptname{pdfissuenum}.
% \moptname{pdfpagerange} indicates the page numbers at which the
% document appears within the publication.  The intention is that this
% be a comma-separated list of dash-separated ranges, as in
% |pdfpagerange={1,4-5}|.  See Note~\ref{note:page-counting} on
% page~\pageref{note:page-counting} for advice on how to assign
% \optname{pdfpagerange} semi-automatically.  For books,
% \moptname{pdfbookedition} names the edition of the book.  This is
% specified as text, not a number.  As with \optname{pdfpublication}
% (above), \optname{pdfbookedition} accepts a bracketed language code,
% as in |pdfbookedition={[en]Second| |edition}|.
%
% The number of pages in the published, print version of the document
% can be expressed with \moptname{pdfnumpages}.
% Note~\ref{note:page-counting} on page~\pageref{note:page-counting}
% explains how to automatically assign a value to \optname{pdfnumpages}.
%
% \acro{XMP} metadata can include a number of dates (in fact,
% timestamps, as they include both date and time components).
% \moptname{pdfdate} specifies the document date.  It is analogous to the
% \LaTeX\ |\date| command, and, like |\date|, defaults to the date the
% document was built.  It must be specified in either \acro{XMP}
% format~\cite{Adobe2012:XMP} or \acro{PDF} format~\cite{Adobe2008:PDF}.
% \acro{XMP} dates are written in the form
% \textsc{yyyy}|-|\textsc{mm}|-|\textsc{dd}|T|hh|:|mm|:|ss|+|\textsc{tt}|:|tt.\footnote{Although
%   allowed by \acro{XMP}, \pkgname{hyperxmp} does not currently accept
%   fractions of a second in timestamps.}  A W3C
% recommendation~\cite{Wolf1997:date-time} discusses this format in more
% detail, but as an example, 14~hours, 15~minutes, 9~seconds past
% midnight U.S. Mountain Daylight Time (UTC-6) on the 23rd day of
% September in the year~2014 should be written as
% \texttt{2014-09-23T14:15:09-06:00}.  This can be truncated (with loss
% of information) to \texttt{2014-09-23T14:15:09},
% \texttt{2014-09-23T14:15}, \texttt{2014-09-23}, \texttt{2014-09},
% or \texttt{2014} but no other subsets.  \acro{PDF} dates are written
% in the form |D:|\textsc{yyyymmdd}hhmmss|+|\textsc{tt}|'|tt|'|.  The
% same date in the preceding example would be written as
% \texttt{D:20140923141509-06'00'} in \acro{PDF} format.
%
% The document's creation date, modification date, and metadata date are
% normally set automatically, but \moptname{pdfcreationdate},
% \moptname{pdfmoddate}, and \moptname{pdfmetadate} can be used to
% override the defaults.  Like \optname{pdfdate}, \optname{pdfmetadate}
% can be specified in either \acro{XMP} or \acro{PDF} format.  However,
% because \pkgname{hyperref} defines \optname{pdfcreationdate} and
% \optname{pdfmoddate} and expects these to be written as \acro{PDF}
% dates, \pkgname{hyperxmp} concomitantly accepts these two dates only
% in \acro{PDF} format as well.  Note that it's rare that a document
% would need to specify any of \optname{pdfcreationdate},
% \optname{pdfmoddate}, or \optname{pdfmetadate}.
%
% \moptname{pdftype} describes the type of document being produced.
% This refers to ``the nature or genre of the
% resource''~\cite{Adobe2012:XMP} such as |poem|, |novel| or |working|
% |paper|, as opposed to the file format (always |application/pdf| when
% generated by \pkgname{hyperxmp}).  Although \optname{pdftype} can be
% assigned an arbitrary piece of text, the \acro{XMP} specification
% recommends selecting types from a ``controlled vocabulary'' such as
% the \acro{DCMI} Type Vocabulary~\cite{DCMI2012:meta-terms}.  The
% \acro{DCMI} Type Vocabulary currently consists of only |Collection|,
% |Dataset|, |Event|, |Image|, |InteractiveResource|, |MovingImage|,
% |PhysicalObject|, |Service|, |Software|, |Sound|, |StillImage|, and
% |Text|.  \optname{pdftype} defaults to |Text|, which refers to
% ``books, letters, dissertations, poems, newspapers, articles, archives
% of mailing lists,''~\cite{DCMI2012:meta-terms} and other forms of
% text---all things \LaTeX\ is commonly used to typeset.
%
% Sometimes a base document is rendered in different forms.
% \moptname{pdfrendition} indicates the particular rendition the current
% document instance represents.  The value should come from the
% following controlled vocabulary~\cite{Adobe2012:XMP}: |default|,
% |draft|, |low-res|, |proof|, |screen|, and |thumbnail|.
% \pkgname{hyperxmp}'s default value is |default|, which indicates the
% master document, unless the \optname{draft} option is passed to
% |\documentclass|, in which case \pkgname{hyperxmp} defaults to
% |draft|.
%
% The \moptname{pdfbytes} option expresses the document's file size in
% bytes.  The intention is for this to be used to display an estimate of
% download time to a user or to serve as a quick check on whether a file
% was transmitted correctly between systems.  This feature is easiest to
% use in conjunction with \pdfTeX's |\pdffilesize| primitive:
% ``|pdfbytes={\pdffilesize{\jobname.pdf}}|''.  Note that this requires
% a second run of |pdftex| because it queries the size of the \acro{PDF}
% file from the \emph{previous} run.
%
% \pkgname{hyperxmp} honors \pkgname{hyperref}'s \moptname{pdftrapped}
% option.  A document can indicate whether it employs
% \href{https://en.wikipedia.org/wiki/Trap_(printing)}{color trapping}
% by specifying \optname{pdftrapped}=|True| or
% \optname{pdftrapped}=|False|.  (\optname{pdftrapped}=|Unknown| is also
% allowed.)  A current limitation of \pkgname{hyperxmp} is that if a
% value other than |False| is provided, a document will additionally
% need to specify \optname{keeppdfinfo}
% (page~\pageref{page:keeppdfinfo}) to ensure that the \acro{PDF}
% \pdfterm{Info} dictionary specifies the correct trapping value.
%
% \moptname{pdfapart} and \moptname{pdfaconformance}, are used in
% conjunction with \pkgname{hyperref}'s \optname{pdfa} option to claim a
% particular \acro{PDF/A} standard by which the document abides.  They
% default to \optname{pdfapart}=|1| and \optname{pdfaconformance}=|B|,
% indicating the \PDFstd{A}{1}{b}{} standard.  These can be
% changed (with caution) to assert that the document abides by a
% different standard (e.g.,~\PDFstd{A}{2}{u}{}).  A document that
% conforms to the \acro{PDF/UA} standard can use \moptname{pdfuapart} to
% indicate the \acro{PDF/UA} conformance level.  For example,
% \optname{pdfuapart}=|1| asserts that the document respects
% \PDFstd{UA}{1}{}{}.  \moptname{pdfxstandard} indicates
% the particular \acro{PDF/X} standard by which the document abides.
% Unlike \optname{pdfpart} and \optname{pdfaconformance}, which accept a
% number and a letter, respectively, \optname{pdfxstandard} expects a
% textual identification of a standard name.  The following are the
% \acro{PDF/X} standard names that are considered acceptable at the time
% of this writing.
%
% ^^A  This list needs to be kept up-to-date with the standards checked
% ^^A  by \@pdfxstandard.
% \begin{multicols}{3}
%   \raggedcolumns
%   \begin{itemize}[noitemsep]
%   \item \PDFstd{X}{1}{a}{2001}
%   \item \PDFstd{X}{1}{a}{2003}
%   \item \PDFstd{X}{3}{}{2002}
%   \item \PDFstd{X}{3}{}{2003}
%   \item \PDFstd{X}{4}{}{}
%   \item \PDFstd{X}{4}{p}{}
%   \item \PDFstd{X}{5}{g}{}
%   \item \PDFstd{X}{5}{n}{}
%   \item \PDFstd{X}{5}{pg}{}
%   \end{itemize}
% \end{multicols}
%
% For example, one can specify \optname{pdfxstandard}=|{PDF/X-4}| or
% \optname{pdfxstandard}=|{PDF/X-3:2003}|, but specifying
% \optname{pdfxstandard}=|{PDF/X-3}| will not pass \acro{PDF/X}
% validation.  Note that at the time of this writing the use of the
% \PDFstd{X}{4}{p}{}, \PDFstd{X}{5}{n}{}, and \PDFstd{X}{5}{pg}{}
% standards has not been tested.
%
% A rarely needed option, \moptname{pdfsource}, overrides the name of
% the \LaTeX\ source file.  It defaults to |\jobname.tex| but can be
% replaced by any other string.  If \optname{pdfsource} is given an
% empty argument, no document source will be specified at all.
%
% \bigskip
%
% It is usually more convenient to provide values for the preceding
% options using \pkgname{hyperref}'s |\hypersetup| command than on the
% |\usepackage| command line.  See
% \href{http://mirrors.ctan.org/macros/latex/contrib/hyperref/hyperref.pdf}{the
%   \pkgname{hyperref} manual} for more information.
%
%
% \subsection{A complete example}
%
% The following is a sample \LaTeX\ document that provides values for
% most of the metadata options that \pkgname{hyperxmp} recognizes:
%
% \Needspace{4\baselineskip}
% \refstepcounter{pagelabel}
% \label{page:begin-sample-doc}
% \begin{verbatim}
%    \documentclass{article}
%    \usepackage[utf8]{inputenc}
%    \usepackage{hyperxmp}
%    \usepackage[unicode]{hyperref}
%
%    \title{%
%      On a heuristic viewpoint concerning the production and
%      transformation of light}
%    \author{Albert Einstein}
%    \date{March 17, 1905}
%
%    \hypersetup{%
%      pdftitle={%
%        On a heuristic viewpoint concerning the production and
%        transformation of light},
%      pdfsubtitle={[en-US]Putting that bum Maxwell in his place},
%      pdfauthor={Albert Einstein},
%      pdfauthortitle={\xmpquote{Technical Assistant\xmpcomma\ Level III}},
%      pdfdate={1905-03-17},
%      pdfcopyright={Copyright (C) 1905, Albert Einstein},
%      pdfsubject={photoelectric effect},
%      pdfkeywords={energy quanta, Hertz effect, quantum physics},
%      pdflicenseurl={http://creativecommons.org/licenses/by-nc-nd/3.0/},
%      pdfcaptionwriter={Scott Pakin},
%      pdfcontactaddress={Kramgasse 49},
%      pdfcontactcity={Bern},
%      pdfcontactpostcode={3011},
%      pdfcontactcountry={Switzerland},
%      pdfcontactphone={031 312 00 91},
%      pdfcontactemail={aeinstein@ipi.ch},
%      pdfcontacturl={%
%        http://einstein.biz/,
%        https://www.facebook.com/AlbertEinstein
%      },
%      pdfdocumentid={uuid:6d1ac9ec-4ff2-515a-954b-648eeb4853b0},
%      pdfversionid={2.998e8},
%      pdfpublication={[de]Annalen der Physik},
%      pdfpublisher={Wiley-VCH},
%      pdfpubtype={journal},
%      pdfvolumenum={322},
%      pdfissuenum={6},
%      pdfpagerange={132-148},
%      pdfnumpages={17},
%      pdfissn={0003-3804},
%      pdfeissn={1521-3889},
%      pdflang={en},
%      pdfmetalang={en},
%      pdfurl={http://www.physik.uni-augsburg.de/annalen/history/einstein-papers/1905_17_132-148.pdf},
%      pdfdoi={10.1002/andp.19053220607},
%      pdfbytes={\pdffilesize{\jobname.pdf}}   % Requires pdflatex
%    }
%    \XMPLangAlt{de}{pdftitle={Über einen die Erzeugung und Verwandlung des
%      Lichtes betreffenden heuristischen Gesichtspunkt}}
%
%    \begin{document}
%    \maketitle
%    A profound formal difference exists between the theoretical
%    concepts that physicists have formed about gases and other
%    ponderable bodies, and Maxwell's theory of electromagnetic
%    processes in so-called empty space\dots
%    \end{document}
% \end{verbatim}
% \refstepcounter{pagelabel}
% \label{page:end-sample-doc}
%
% Compile the document to \acro{PDF} using any of the following
% approaches:
%
% \begin{itemize}
%   \item \pdfLaTeX
%   \item \LuaLaTeX
%   \item \LaTeX~$+$ Dvipdfm
%   \item \LaTeX~$+$ \Dvips~$+$ Adobe Acrobat Distiller
%   \item \XeLaTeX
% \end{itemize}
%
% \noindent
% Unfortunately, the \LaTeX~$+$ \Dvips~$+$ \term{Ghostscript} path
% doesn't work.
% \href{http://bugs.ghostscript.com/show_bug.cgi?id=690066}{Ghostscript
%   bug report~\#690066}, closed with ``\textsc{wontfix}'' status on
% 2012-05-28, explains that \term{Ghostscript} doesn't honor the
% \pdfterm{Metadata} tag needed to inject a custom \acro{XMP} packet.
% Instead, \term{Ghostscript} fabricates an \acro{XMP} packet of its own
% based on the metadata it finds in the \acro{PDF} file's \pdfterm{Info}
% dictionary (\pdfterm{Author}, \pdfterm{Title}, \pdfterm{Subject}, and
% \pdfterm{Keywords}).
%
% \bigskip
%
% Once the document is compiled, the resulting \acro{PDF} file will
% contain an \acro{XMP} packet that looks something like that shown in
% Appendix~\ref{sec:sample-packet}.  Figure~\ref{fig:xmp-metadata-1} is
% a screenshot of the \acro{XMP} metadata as it appears in Adobe
% Acrobat's ``Advanced'' metadata dialog box.  Further clicking on the
% ``Advanced'' item within that dialog box displays all of the
% document's metadata sorted by schema as shown in
% Figure~\ref{fig:xmp-metadata-2}.
%
% \begin{figure}[htbp]
%   \includegraphics[width=\linewidth]{einstein1}
%   \caption{\acro{XMP} metadata as it appears in Adobe Acrobat}
%   \label{fig:xmp-metadata-1}
% \end{figure}
%
% \begin{figure}[htbp]
%   \includegraphics[width=\linewidth]{einstein2}
%   \caption{Additional \acro{XMP} metadata as it appears in Adobe Acrobat}
%   \label{fig:xmp-metadata-2}
% \end{figure}
%
%
% \subsection{Usage notes}
%
% \usagenote{Conflicting metadata in PDF/A documents}
% \label{note:meta-conflicts}
% A \acro{PDF} file includes an \pdfterm{Info} dictionary containing
% \pdfterm{Author}, \pdfterm{Title}, \pdfterm{Subject}, and
% \pdfterm{Keywords} keys.  The \pkgname{hyperref} package's
% \optname{pdfauthor}, \optname{pdftitle}, \optname{pdfsubject}, and
% \optname{pdfkeywords} options assign values to those keys.  The
% \pkgname{hyperxmp} package additionally uses those options to assign
% values to various \acro{XMP} metadata: \xmpprop{dc:creator},
% \xmpprop{dc:title}, \xmpprop{dc:description}, and
% \xmpprop{pdf:Keywords}.  The \acro{PDF/A} specification indicates that
% values that appear in both the \acro{PDF} \pdfterm{Info} dictionary
% and \acro{XMP} packet must match.  The problem is that in \acro{XMP},
% the author and keywords can be proper lists, as in
%
% \Needspace{7\baselineskip}
% \begin{verbatim}
%     <dc:creator>
%       <rdf:Seq>
%         <rdf:li>Curly Howard</rdf:li>
%         <rdf:li>Larry Fine</rdf:li>
%         <rdf:li>Moe Howard</rdf:li>
%       </rdf:Seq>
%     </dc:creator>
% \end{verbatim}
%
% \noindent
% while in \acro{PDF}, the author and keywords are specified as flat
% strings.  Alas, there is no definition of how a list should be
% collapsed to a flat string: ``\texttt{Curly Howard, Larry Fine, Moe
%   Howard}'' or ``\texttt{Curly Howard; Larry Fine; Moe Howard}'' or
% something else.  I have not yet found a form of flat string that
% passes all \acro{PDF/A} validators.  Furthermore, when Adobe
% Acrobat---at least Adobe Acrobat DC (2019) and earlier
% versions---converts a \acro{PDF} file to \acro{PDF/A} format, it does
% so by discarding all but the first author, which is an unsatisfying
% solution.
%
% Starting with version~4.0, \pkgname{hyperxmp}'s solution is to
% suppress writing metadata to the \acro{PDF} \pdfterm{Info} dictionary
% and write it only to the \acro{XMP} packet.  (\pkgname{hyperxmp}~v5.0+
% is more sophisticated.  It suppresses only the author and keyword
% lists.)  This appears to pacify \acro{PDF/A} validators yet retains
% the author and keyword lists in their non-truncated form.  If desired,
% the \pdfterm{Info} dictionary can be retained by passing the
% \moptname{keeppdfinfo}\label{page:keeppdfinfo} option to
% \cs{hypersetup}.
%
% \usagenote{Acrobat multiline-field bug}
% The \acro{IPTC} Photo Metadata schema states that ``the [contact]
% address is a multiline field''~\cite{IPTC2010:photo-meta}.
% \pkgname{hyperxmp} converts commas in \optname{pdfcontactaddress}'s
% argument to line breaks in the generated \acro{XML}\@.  Unfortunately,
% A bug in Adobe Acrobat---at least in Adobe Acrobat DC (2019) and
% earlier versions---causes that \acro{PDF} reader to discard line
% breaks in the contact address.  Interestingly, Adobe Illustrator CS5
% correctly displays the contact address.  If you find Adobe Acrobat's
% behavior bothersome, you can redefine the
% \DescribeMacro{\xmplinesep}|\xmplinesep| macro as a string to use as
% an address-line separator.  For example, the following replaces all
% commas appearing in \optname{pdfcontactaddress}'s argument with
% semicolons:
%
% \begin{verbatim}
%     \renewcommand*{\xmlinesep}{;}
% \end{verbatim}
%
% \usagenote{Object compression}
% One intention of \acro{XMP} is that metadata embedded in a file be
% readable even without knowledge of the file's format.  That is, the
% metadata are expected to appear as plain text.  Although
% \pkgname{hyperxmp} does its best to honor that intention, it faces
% a few challenges:
%
% \begin{enumerate}
% \item When run with versions of \LuaLaTeX\ earlier than 0.85,
%   \pkgname{hyperxmp} leaves all \acro{PDF} objects uncompressed.  This
%   is due to \LuaLaTeX\ treating object compression as a global
%   parameter, unlike \pdfLaTeX, which treats it as a local parameter.
%   Hence, when \pkgname{hyperxmp} requests that the \acro{XMP} packet
%   be left uncompressed, \LuaLaTeX\ in fact leaves \emph{all}
%   \acro{PDF} streams uncompressed.  Beginning with version~3.0,
%   \pkgname{hyperxmp} includes a workaround that correctly leaves only
%   the \acro{XMP} metadata uncompressed, but this workaround is
%   implemented only for \LuaLaTeX\ v0.85 onwards.
%
% \item \XeLaTeX\ (or, more precisely, the \cmdname{xdvipdfmx} back end)
%   exhibits the opposite problem.  It compresses \emph{all} \acro{PDF}
%   objects, including the ones containing \acro{XMP} metadata.  While
%   Adobe Acrobat can still detect and utilize the \acro{XMP} metadata,
%   non-\acro{PDF}-aware applications are unlikely to see the metadata.
%   Three options to consider are to (1)~use a different program
%   (e.g.,~\LuaLaTeX), (2)~pass the |--output-driver="xdvipdfmx -z0"|
%   option to \XeLaTeX\ to instruct \cmdname{xdvipdfmx} to turn off all
%   compression (which will of course make the \acro{PDF} file
%   substantially larger), or (3)~postprocess the generated \acro{PDF}
%   file by loading it into the commercial version of Adobe Acrobat and
%   re-saving it with the Save As\dots\ menu option.
% \end{enumerate}
%
% \usagenote{Literal commas}
% \label{note:literal-commas}
% \pkgname{hyperxmp} splits the \optname{pdfauthor} and
% \optname{pdfkeywords} lists at commas.  Therefore, when specifying
% \optname{pdfauthor} and \optname{pdfkeywords}, you should separate
% items with commas.  Also, omit ``|and|'' and other text that does not
% belong to any list item.  The following examples should serve as
% clarification:
%
% \begin{description}
%   \item[Wrong:] |pdfauthor={Jack Napier, Edward Nigma,|
%     \textcolor{red}{\texttt{and}} |Harvey Dent}|
%   \item[Wrong:] |pdfauthor={Jack Napier|\textcolor{red}{\texttt{;}}
%     |Edward Nigma|\textcolor{red}{\texttt{;}}
%     |Harvey Dent}|
%   \item[Right:] |pdfauthor={Jack Napier, Edward Nigma, Harvey Dent}|
% \end{description}
%
% \noindent
% \DescribeMacro{\xmpcomma}
% \DescribeMacro{\xmpquote}
% If you need to include a literal comma within an author or keyword
% list (where commas normally separate list items) or a street address
% (where commas normally separate lines), use the |\xmpcomma| macro to
% represent it, and wrap the entire entry containing the comma within
% |\xmpquote{|\dots|}| as shown below:
%
% \begin{verbatim}
%     pdfauthor={\xmpquote{Jack Napier\xmpcomma\ Jr.},
%                \xmpquote{Edward Nigma\xmpcomma\ PhD},
%                \xmpquote{Harvey Dent\xmpcomma\ Esq.}}
%
%     pdfcontactaddress={Office of the President,
%                        \xmpquote{Wayne Enterprises\xmpcomma\ Inc.},
%                        One Wayne Blvd}
% \end{verbatim}
%
% As of version~2.2 of \pkgname{hyperxmp}, it is acceptable to use
% |\xmpcomma| and |\xmpquote| within any \pkgname{hyperxmp} option, not
% just in those in which a comma normally serves as a separator
% (i.e.,~lists and multiline fields).  Outside of cases in which a comma
% serves as a separator, |\xmpcomma| is treated as an ordinary comma,
% and |\xmpquote| returns its argument unmodified.  Hence, it is
% legitimate to use |\xmpcomma| and |\xmpquote| in cases like the
% following
%
% \begin{verbatim}
%     pdfauthortitle={\xmpquote{Psychiatrist\xmpcomma\ Arkham Asylum}}
% \end{verbatim}
%
% \noindent
% (Like most \pkgname{hyperxmp} options, \optname{pdfauthortitle}
% inserts its argument unmodified in an \acro{XMP} tag.)  When in
% doubt, use |\xmpcomma| and |\xmpquote|; it should always be safe
% to do so.
%
% \DescribeMacro{\xmptilde}
% Version~2.4 of \pkgname{hyperxmp} introduces a convenience macro
% called |\xmptilde|.  |\xmptilde| expands to a literal tilde character
% instead of the nonbreaking space that ``|~|'' normally represents.
% Use it to represent \acro{URL}s such as
% \url{http://www.pakin.org/~scott/} (``|http://www.pakin.org/|\linebreak[0]|\xmptilde|
% |scott/|'') in options such as \optname{baseurl},
% \optname{pdfcontacturl} and \optname{pdflicenseurl}.
%
% \usagenote{Unicode support}
% \term{Unicode} support is provided via the \pkgname{hyperref} package.
% If you specify \optname{unicode}|=true| either as a \pkgname{hyperref}
% option or as an argument to the |\hypersetup| command, the document
% can include \term{Unicode} characters in its \acro{XMP} fields.
%
% \usagenote{Automatically specified metadata}
% \optname{pdftitle} defaults to the document's title as specified by
% |\title{|\dots|}|.  \optname{pdfauthor} defaults to the document's
% author(s) as specified by |\author{|\dots|}|.  \optname{pdfdate}
% defaults to the current date and time.  \optname{pdfmetalang}
% defaults to the same value as \optname{pdflang} if non-empty,
% ``|x-default|'' otherwise.  An implication of automatic
% metadata specification is that an author can simply include
% |\usepackage{hyperxmp}| in a document's preamble and benefit from
% a modicum of \acro{XMP} metadata with no additional effort.
%
% \usagenote{Multilingual metadata}
% \label{note:multilingual}
% The \optname{pdfmetalang} option specifies the language in which the
% document's metadata is written.  It defaults to the value of
% \optname{pdflang}, which specifies the document language.
% \DescribeMacro{\XMPLangAlt} As of version~3.3 of \pkgname{hyperxmp},
% it is possible to include certain metadata---specifically, the
% document's title, subject, and copyright statement---in more than one
% language.  The |\XMPLangAlt| macro provides this functionality.  Usage
% is as follows:
%
% \bigskip
% \indent
% |\XMPLangAlt| \marg{language} |{| \meta{option}|=|\meta{text},~\dots\ |}|
% \bigskip
%
% \noindent
% where \meta{language} is an \acro{ISO} \mbox{639-1} two-letter country
% code with an optional \acro{ISO} \mbox{3166-1} two-letter region code
% (e.g.,~``|en|'' for English or ``|en-US|'' for specifically US
% English); \meta{option} is one of ``|pdftitle|'', ``|pdfsubject|'', or
% ``|pdfcopyright|''; and \meta{text} is the text as expressed in the
% specified language.  By way, of example, the following code provides
% the document title in English then specifies an alternative title to
% use in four other languages:
%
% \begin{verbatim}
%   \hypersetup{%
%     pdfmetalang={en},
%     pdftitle={English title}
%   }
%   \XMPLangAlt{de}{pdftitle={Deutscher Titel}}
%   \XMPLangAlt{fr}{pdftitle={Titre fran\c{c}ais}}
%   \XMPLangAlt{it}{pdftitle={Titolo italiano}}
%   \XMPLangAlt{rm}{pdftitle={Titel rumantsch}}
% \end{verbatim}
%
% \usagenote{Expandable arguments}
% \label{note:expandable}
% All arguments passed to \pkgname{hyperxmp} options must be expandable,
% in \tex\ terminology.  This implies that any macros that are used in
% arguments are limited to a relatively small set of operations (such as
% conditionals and macro expansion) and must produce a string of text.
% Code (such as macro definitions and arithmetic operations) will be
% written to \acro{XMP} as code, not as the result of executing the
% code.
%
% By way of example, the macros provided by the \pkgname{texdate}
% package for typesetting dates are not expandable (at least at the time
% of this writing).  Hence, the |\printfdate{Y}| in the following code
% snippet is not replaced by the current year, as one might expect:
%
% \begin{verbatim}
% \usepackage{texdate}
% \initcurrdate
% \hypersetup{%
%   pdfcopyright={Copyright \textcopyright\ \printfdate{Y}, Scott Pakin}
% }
% \end{verbatim}
%
% \noindent
% Rather, it generates a \xmpprop{dc:rights} tag of the form
% ``\texttt{Copyright \textcopyright\ =2=0=by-1by=0\the\year, Scott
%   Pakin}''.  The garbage in that line corresponds to the remnants of
% the |\printfdate| code after expanding all of the \tex\ primitives and
% certain other control sequences it uses to the empty string.  For
% example, ``|\global\advance\texd@yr| |by-1|'' expands to ``|by-1|''.
%
% It is not possible to determine a~priori whether or not a macro is
% expandable.  The best advice is to carefully inspect the \acro{XMP}
% package in the output file to ensure that any macros used in arguments
% to \pkgname{hyperxmp} options produced the expected output.
%
% \usagenote{Automatic page counting}
% \label{note:page-counting}
% Although \optname{pdfnumpages} and \optname{pdfpagerange} are intended
% to refer to pages in the final, published version of a document, it
% would be convenient for them to be generated automatically when
% producing a standalone \acro{PDF} file that is not intended to be
% incorporated into a book, journal, or other publication (or if it is
% known that the pages will not be renumbered for publication).  One
% approach is to use the \pkgname{totpages} package to keep track of the
% number of pages.
%
% \begin{verbatim}
%     \hypersetup{%
%       pdfnumpages={\ref*{TotPages}}
%     }
% \end{verbatim}
%
% \pkgname{totpages} can likewise help generate \optname{pdfpagerange}.
% For documents numbered from~1 to~$n$, a simple
%
% \begin{verbatim}
%     \hypersetup{%
%       pdfpagerange={1-\ref*{TotPages}}
%     }
% \end{verbatim}
%
% \noindent
% should suffice.  A bit more effort is needed for documents that change
% numbering schemes, such as using lowercase Roman numerals for the
% front matter and Arabic numerals for the main matter and back matter.
% One approach is to use \cs{label} to mark the first and last page of
% each numbering scheme and specify \optname{pdfpagerange} as in the
% following:
%
% \Needspace{6\baselineskip}
% \begin{verbatim}
%     \hypersetup{%
%       pdfpagerange={%
%         \pageref*{page:begin-front}-\pageref*{page:end-front},%
%         1-\pageref*{TotPages}%
%       }
%     }
% \end{verbatim}
%
% I don't know how unnumbered pages (e.g.,~blank pages and the title
% page) are supposed to be handled.  I suppose blank pages can be
% omitted from \optname{pdfpagerange}, and title page can be either
% omitted or listed as |title|, for example.
%
% It appears that at least with version~2.00 of \pkgname{totpages}, the
% |TotPages| label is not defined until after the |\begin{document}|.
% Consequently, using |TotPages| within a \cs{hypersetup} invocation in
% the document's preamble will produce ``|??|'' as the page count in the
% \acro{XMP} packet.  The solution is either to assign
% \optname{pdfnumpages} and \optname{pdfpagerange} after the
% |\begin{document}| or to ask \LaTeX\ to do that on your behalf:
%
% \begin{verbatim}
%     \AtBeginDocument{%
%       \hypersetup{%
%         pdfnumpages={\ref*{TotPages}},
%         pdfpagerange={1-\ref*{TotPages}}
%       }%
%     }
% \end{verbatim}
%
%
% \StopEventually{^^A
% \section{Help Wanted}
%
% \paragraph{Comma handling}
% Ideally, \texttt{\string\xmpquote} should automatically replace all
% commas with \texttt{\string\xmpcomma}.  Unfortunately, my \tex\ skills
% are insufficient to pull that off.  If you know a way to make
% \texttt{\string\xmpquote\string{Hello, world\string}} work with both
% \term{Unicode} and non-\term{Unicode} encodings and with all
% \tex\ engines (\pdfTeX, \LuaTeX, \XeTeX, etc.), please send me a code
% patch.
%
% \appendix
%
% \section{Sample XMP Packet}
% \label{sec:sample-packet}
%
% The following is an example of a complete \acro{XMP} packet as may be
% produced by \pkgname{hyperxmp}.  This packet corresponds to the
% metadata included in the sample \LaTeX\ document presented
% \vpagerefrange{page:begin-sample-doc}{page:end-sample-doc}.  For
% clarity, metadata values, either specified explicitly by the document
% or introduced automatically by \pkgname{hyperxmp}, are colored blue.
%
% \input{einstein-xmp}
%
% \begin{thebibliography}{99}
% \bibitem{Adobe2010:pdfmark}
% Adobe Systems, Inc., San Jose, California.
% \newblock \emph{{A}dobe {A}crobat~{X} {SDK} Help, pdfmark Reference}.
% \newblock Available from
%   \url{http://www.adobe.com/devnet/acrobat/documentation.html}.
%
% \bibitem{Adobe1996:postscript}
% {Adobe Systems, Inc.}
% \newblock \emph{{P}ost{S}cript Language Reference Manual}.
% \newblock Addison-Wesley, 2nd edition, January 1996, ISBN: \mbox{0-201-18127-4}.
%
% \bibitem{Adobe2008:PDF}
% Adobe Systems, Inc., San Jose, California.
% \newblock \emph{Document Management---Portable Document Format---Part 1:
%   PDF~1.7}, July 2008.
% \newblock ISO \mbox{32000-1} standard document. Available from
%   \url{http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/PDF32000_2008.pdf}.
%
% \bibitem{Adobe2012:XMP}
% Adobe Systems, Inc., San Jose, California.
% \newblock \emph{{XMP} Specification Part~1: Data model, Serialization, and Core
%   Properties}, April 2012.
% \newblock Available from
%   \url{http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/xmp/pdfs/cc-201306/XMPSpecificationPart1.pdf}.
%
% \bibitem{DCMI2012:meta-terms}
% DCMI Usage Board
% \newblock \emph{DCMI Metadata Terms}, June~14, 2012.
% \newblock Available from \url{http://dublincore.org/documents/dcmi-terms/}.
%
% \bibitem{Downes1994:ATB15}
% Michael Downes.
% \newblock Around the bend~\#15, answers, 4th (last) installment.
% \newblock \href{news:comp.text.tex}{\texttt{comp.text.tex}} newsgroup posting,
%   January~3, 1994.
% \newblock Archived by Google at
%   \url{http://groups.google.com/group/comp.text.tex/msg/7da7643b9e8f3b48}.
%
% \bibitem{PRISM2012:basic-meta}
% International Digital Enterprise Alliance, Inc.
% \newblock \emph{Publishing Requirements for Industry Standard Metadata,
%   Version~3.0: {PRISM} Basic Metadata Specification}, October~12, 2012.
% \newblock Available from
%   \url{http://www.prismstandard.org/specifications/3.0/PRISM_Basic_Metadata_3.0.htm}.
%
% \bibitem{PRISM2012:cont-voc}
% International Digital Enterprise Alliance, Inc.
% \newblock \emph{Publishing Requirements for Industry Standard Metadata,
%   Version~3.0: {PRISM} Controlled Vocabularies Specification}, October~4, 2012.
% \newblock Available from
%   \url{http://www.prismstandard.org/specifications/3.0/PRISM_CV_Spec_3.0.pdf}.
%
% \bibitem{IPTC2010:photo-meta}
% International Press Telecommunications Council.
% \newblock \emph{{IPTC} Photo Metadata: Core 1.1/Extension 1.1}, July 2010.
% \newblock Revision~1. Available from
%   \url{http://www.iptc.org/std/photometadata/specification/IPTC-PhotoMetadata-201007_1.pdf}.
%
% \bibitem{IANA2011:lang-tags}
% {Internet Assigned Numbers Authority}.
% \newblock Language subtag registry, January~11, 2011.
% \newblock Available from
%   \url{http://www.iana.org/assignments/language-subtag-registry}.
%
% \bibitem{Leach2005:uuid}
% Paul~J. Leach, Michael Mealling, and Rich Salz.
% \newblock A {U}niversally {U}nique {ID}entifier ({UUID}) {URN} namespace.
% \newblock Request for Comments 4122, Internet Engineering Task Force, Network
%   Working Group, July 2005.
% \newblock Category: Standards Track. Available from
%   \url{http://www.ietf.org/rfc/rfc4122.txt}.
%
% \bibitem{PDFA2008:xmp-props}
% PDF/A Competence Center, Berlin, Germany.
% \newblock \emph{{T}ech{N}ote~0008: Predefined {XMP} Properties in {PDF/A-1}},
%   March~20, 2008.
% \newblock Available from
%   \url{http://www.pdfa.org/wp-content/uploads/2011/08/tn0008_predefined_xmp_properties_in_pdfa-1_2008-03-20.pdf}.
%
% \bibitem{PDFA2008:ext-schemas}
% PDF/A Competence Center, Berlin, Germany.
% \newblock \emph{{T}ech{N}ote~0009: {XMP} Extension Schemas in {PDF/A-1}},
%   March~20, 2008.
% \newblock Available from
%   \url{http://www.pdfa.org/wp-content/uploads/2011/08/tn0009_xmp_extension_schemas_in_pdfa-1_2008-03-20.pdf}.
%
% \bibitem{Wolf1997:date-time}
% Misha Wolf and Charles Wicksteed.
% \newblock Date and time formats.
% \newblock Note NOTE-datetime, World Wide Web Consortium (W3C), September~15,
%   1997.
% \newblock Available from \url{http://www.w3.org/TR/NOTE-datetime}.
% \end{thebibliography}
% }
%
%
% \section{Implementation}
%
% This section presents the commented \LaTeX\ source code for
% \pkgname{hyperxmp}.  Read this section only if you want to learn how
% \pkgname{hyperxmp} is implemented.
%
% \iffalse
%<*package>
% \fi
%
% \subsection{Initial preparation}
% \label{sec:initial-prep}
%
% \changes{v1.2}{2011/04/17}{Made the package compatible with \pkgname{ngerman}.
%   Thanks to Tobias Mueller for the bug report.}
%
% \begin{macro}{\hyxmp@dq@code}
% The \pkgname{ngerman} package redefines
% ``\,{\fontencoding{T1}\selectfont\textquotedbl}\,'' as an active
% character, which causes problems for \pkgname{hyperxmp} when it tries
% to use that character.  We therefore save the double-quote character's
% current category code in |\hyxmp@dq@code| and mark the character as
% category code~12 (``other'').  The original category code is restored
% at the end of the package code (Section~\ref{sec:clean-up}).
%    \begin{macrocode}
\edef\hyxmp@dq@code{\the\catcode`\"}
\catcode`\"=12
%    \end{macrocode}
% \end{macro}
%
% \changes{v1.5}{2012/03/10}{Made the \protect\acro{XMP} inclusion more robust.
%   Thanks to Heiko Oberdiek for the bug report and suggested modifications.}
%
% \begin{macro}{\hyxmp@at@end}
% \begin{macro}{\hyxmp@driver}
% The |\hyxmp@at@end| macro includes code at the end of the document.
% For \pdfTeX, the standard |\AtEndDocument| works well enough.  For all
% the other backends we use |\AtEndDvi| from the \pkgname{atenddvi}
% package, which is more robust but requires an addition \LaTeX\ run.
%    \begin{macrocode}
\def\hyxmp@driver{hpdftex}
\ifx\hyxmp@driver\Hy@driver
  \let\hyxmp@at@end=\AtEndDocument
\else
  \RequirePackage{atenddvi}
  \let\hyxmp@at@end=\AtEndDvi
\fi
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
%
% \subsection{Integration with \textsf{hyperref}}
% \label{sec:hyperref-int}
%
% An important design decision underlying \pkgname{hyperxmp} is that the
% package should integrate seamlessly with \pkgname{hyperref}.  To that
% end, \pkgname{hyperxmp} takes \acro{XMP} metadata from
% \pkgname{hyperref}'s \optname{baseurl}, \optname{pdfauthor},
% \optname{pdfkeywords}, \optname{pdflang}, \optname{pdfproducer},
% \optname{pdfsubject}, \optname{pdftrapped}, and \optname{pdftitle}
% options.  It also introduces a number of new options, which are listed
% \vpagerefrange[above]{page:begin-new-options}{page:end-new-options}.
% For consistency with \pkgname{hyperref}'s document-metadata naming
% conventions (which are in turn based on \LaTeX's document-metadata
% naming conventions), we do not prefix metadata-related macro names
% with our package-specific |\hyxmp@| prefix.  That is, we use names
% like |\@pdfcopyright| instead of |\hyxmp@pdfcopyright|.
%
% \bigskip
%
% We load a bunch of helper packages: \pkgname{kvoptions} for
% package-option processing, \pkgname{pdfescape} and \pkgname{stringenc}
% for re-encoding \term{Unicode} strings, \pkgname{intcalc} for
% performing integer calculations (division and modulo), \pkgname{iftex}
% for determining which \tex\ engine is being used, \pkgname{ifmtarg}
% for testing if a macro argument is empty or all spaces,
% \pkgname{etoolbox} for dynamically patching existing commands
% (specifically, \pkgname{hyperref}'s |\PDF@FinishDoc|), and
% \pkgname{ifthen} for convenient string comparisons.
%    \begin{macrocode}
\RequirePackage{kvoptions}
\RequirePackage{pdfescape}
\RequirePackage{stringenc}
\RequirePackage{intcalc}
\RequirePackage{iftex}
\RequirePackage{ifmtarg}
\RequirePackage{etoolbox}
\RequirePackage{ifthen}
%    \end{macrocode}
%
% \begin{macro}{\@ifmtargexp}
% \begin{macro}{\@ifnotmtargexp}
% |\@ifmtarg| and |\@ifnotmtarg| do not expand their first argument.
% Define |\@ifmtargexp| and |\@ifnotmtargexp| as expanding versions of
% those macros.
%    \begin{macrocode}
\def\@ifmtargexp#1{\expandafter\@ifmtarg\expandafter{#1}}
\def\@ifnotmtargexp#1{\expandafter\@ifnotmtarg\expandafter{#1}}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@pdfstringdef}
% \begin{macro}{\hyxmp@textunderscore}
% Because \pkgname{hyperxmp} uses underscores to represent hard spaces,
% we need ``|\_|'' to map initially to something other than an
% underscore, in particular the \acro{ASCII} \acro{NAK}~(|^^U|)
% character.  To accomplish this, we wrap \pkgname{hyperref}'s
% |\pdfstringdef| macro with our own version that temporarily does the
% proper substitution.  Later in the execution, after underscores have
% been replaced with spaces, we replace \acro{NAK} characters with
% underscores.
% \changes{v2.5}{2014/06/19}{Added this macro}
%    \begin{macrocode}
\newcommand{\hyxmp@pdfstringdef}[2]{%
  \let\hyxmp@textunderscore=\textunderscore
  \let\textunderscore=\hyxmp@uscore
  \pdfstringdef{#1}{#2}%
  \let\textunderscore=\hyxmp@textunderscore
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\@pdfdatetime}
% Prepare to store the document's date and (optionally) time.  Whether
% specified by the author in \acro{XMP} format or \acro{PDF} format
% (see Section~\ref{sec:date-manip}) we always store |\@pdfdatetime| as
% an \acro{XMP}-format string.
%    \begin{macrocode}
\def\@pdfdatetime{}
\define@key{Hyp}{pdfdate}{%
  \begingroup
    \Hy@unicodefalse
%    \end{macrocode}
% \begin{macro}{\next}
% Expand \optname{pdfdate}'s argument and convert it to \acro{XMP} format.
%    \begin{macrocode}
    \edef\next{%
      \noexpand\hyxmp@pdfstringdef\noexpand\@pdfdatetime{%
        \noexpand\hyxmp@as@xmp@date{#1}}%
    }%
    \next
  \endgroup
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\@pdfmetadatetime}
% Prepare to store the document's metadata date and (optionally) time.
% Whether specified by the author in \acro{XMP} format or \acro{PDF}
% format (see Section~\ref{sec:date-manip}) we always store
% |\@pdfmetadatetime| as an \acro{XMP}-format string.
%    \begin{macrocode}
\def\@pdfmetadatetime{}
\define@key{Hyp}{pdfmetadate}{%
  \begingroup
    \Hy@unicodefalse
%    \end{macrocode}
% \begin{macro}{\next}
% Expand \optname{pdfmetadate}'s argument and convert it to \acro{XMP} format.
%    \begin{macrocode}
    \edef\next{%
      \noexpand\hyxmp@pdfstringdef\noexpand\@pdfmetadatetime{%
        \noexpand\hyxmp@as@xmp@date{#1}}%
    }%
    \next
  \endgroup
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\@pdfcopyright}
% Prepare to store the document's copyright statement.
%    \begin{macrocode}
\def\@pdfcopyright{}
\define@key{Hyp}{pdfcopyright}{\hyxmp@pdfstringdef\@pdfcopyright{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdftype}
% Prepare to store the document's logical type, which defaults to ``|Text|''.
%    \begin{macrocode}
\def\@pdftype{Text}
\define@key{Hyp}{pdftype}{\hyxmp@pdfstringdef\@pdftype{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdflicenseurl}
% Prepare to store the \acro{URL} containing the document's license
% agreement.
%    \begin{macrocode}
\def\@pdflicenseurl{}
\define@key{Hyp}{pdflicenseurl}{\hyxmp@pdfstringdef\@pdflicenseurl{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfauthortitle}
% Prepare to store the author's position/title (e.g.,~Staff Writer).
%    \begin{macrocode}
\def\@pdfauthortitle{}
\define@key{Hyp}{pdfauthortitle}{\hyxmp@pdfstringdef\@pdfauthortitle{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfcaptionwriter}
% Prepare to store the name of the person who inserted the
% \pkgname{hyperxmp} metadata.
%    \begin{macrocode}
\def\@pdfcaptionwriter{}
\define@key{Hyp}{pdfcaptionwriter}{\hyxmp@pdfstringdef\@pdfcaptionwriter{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfmetalang}
% Prepare to store the natural language of the document's metadata,
% typically as an \acro{ISO}~\mbox{639-1} two-letter abbreviation.
%    \begin{macrocode}
\def\@pdfmetalang{}
\define@key{Hyp}{pdfmetalang}{\hyxmp@pdfstringdef\@pdfmetalang{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@no@bad@parts}
% Complain about a bad \optname{pdfapart} or \optname{pdfuapart} if given
% trailing non-digits after a part number.
%    \begin{macrocode}
\def\hyxmp@no@bad@parts#1\relax{%
  \@ifnotmtarg{#1}{%
    \PackageWarning{hyperxmp}{pdfapart and pdfuapart must be numeric}%
  }%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfapart}
% Prepare to store the \acro{PDF/A} part ID, which defaults to~``1''
% if \optname{pdfa} is passed to \pkgname{hyperref}.
%    \begin{macrocode}
\def\@pdfapart{}
\define@key{Hyp}{pdfapart}{%
  \afterassignment\hyxmp@no@bad@parts\@tempcnta=0#1\relax
  \hyxmp@pdfstringdef\@pdfapart{\the\@tempcnta}%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfaconformance}
% Prepare to store the \acro{PDF/A} conformance ID, which defaults to~``b''
% if \optname{pdfa} is passed to \pkgname{hyperref} and |\@pdfapart| is
% empty.
%    \begin{macrocode}
\def\@pdfaconformance{}
\define@key{Hyp}{pdfaconformance}{%
  \uppercase{\hyxmp@pdfstringdef\@pdfaconformance{#1}}%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfuapart}
% Prepare to store the \acro{PDF/UA} part ID.
%    \begin{macrocode}
\def\@pdfuapart{}
\define@key{Hyp}{pdfuapart}{%
  \afterassignment\hyxmp@no@bad@parts\@tempcnta=0#1\relax
  \hyxmp@pdfstringdef\@pdfuapart{\the\@tempcnta}%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@set@pdfx@major}
% Parse \optname{pdfxstandard} as ``|PDF/X-|\meta{major}\meta{other}'',
% setting |\hyxmp@pdfx@major| to \meta{major}.
%    \begin{macrocode}
\newcommand*{\hyxmp@set@pdfx@major}[1]{\hyxmp@set@pdfx@major@i#1!}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@set@pdfx@major@i}
% This is the first helper macro for |\hyxmp@set@pdfx@major|.  It stores
% the \acro{PDF/X} major version in |\@tempcnta|.
%    \begin{macrocode}
\def\hyxmp@set@pdfx@major@i PDF/X-{%
  \afterassignment\hyxmp@set@pdfx@major@ii
  \@tempcnta=%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@set@pdfx@major@ii}
% \begin{macro}{\hyxmp@pdfx@major}
% This is the second helper macro for |\hyxmp@set@pdfx@major|.  It
% copies the \acro{PDF/X} major version from |\@tempcnta| to
% |\@hyxmp@pdfx@major| and discards the rest of the \acro{PDF/X}
% standard string.
%    \begin{macrocode}
\def\hyxmp@set@pdfx@major@ii#1!{%
  \edef\hyxmp@pdfx@major{\the\@tempcnta}%
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@check@std}
% \changes{v5.0}{2020/03/10}{Added this macro}
% Compare a user-provided string to a fixed string.  (Assumption: Both
% are names of \acro{PDF/X} standard versions.)  If they match, undefine
% |\next|, which we assume was previously defined to issue an
% ``unrecognized standard'' warning message.
%    \begin{macrocode}
\newcommand*\hyxmp@check@std[2]{%
  \ifthenelse{\equal{#1}{#2}}%
             {\global\let\next=\relax}%
             {}%
}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfxstandard}
% Prepare to store the \acro{PDF/X} standard.
% \changes{v5.0}{2020/03/10}{Added this macro}
%    \begin{macrocode}
\def\@pdfxstandard{}
\def\hyxmp@pdfx@major{}
\define@key{Hyp}{pdfxstandard}{%
  \hyxmp@pdfstringdef\@pdfxstandard{#1}%
%    \end{macrocode}
% \begin{macro}{\next}
% Issue a warning message if the \acro{PDF/X} standard named by the user
% does not appear in a list of known \acro{PDF/X} standards.  This is to
% caution the user that \pkgname{hyperxmp} generates standard-specific
% \acro{XMP} metadata and it can only guess at the correct format for
% new standard versions.  (See the comments on
% page~\pageref{page:pdfx-id-schema} above the definition of
% |\hyxmp@pdfx@id@schema|, for example.)
%    \begin{macrocode}
  \gdef\next{%
    \PackageWarning{hyperxmp}{Unrecognized PDF/X standard `#1'}%
  }%
  \hyxmp@check@std{#1}{PDF/X-1a:2001}%
  \hyxmp@check@std{#1}{PDF/X-1a:2003}%
  \hyxmp@check@std{#1}{PDF/X-3:2002}%
  \hyxmp@check@std{#1}{PDF/X-3:2003}%
  \hyxmp@check@std{#1}{PDF/X-4}%
  \hyxmp@check@std{#1}{PDF/X-4p}%
  \hyxmp@check@std{#1}{PDF/X-5g}%
  \hyxmp@check@std{#1}{PDF/X-5n}%
  \hyxmp@check@std{#1}{PDF/X-5pg}%
  \next
%    \end{macrocode}
% \begin{macro}{\hyxmp@pdfx@major}
% Parse the \acro{PDF/X} major version number from
% \optname{pdfxstandard} and assign it to |\hyxmp@pdfx@major|.
%    \begin{macrocode}
  \hyxmp@set@pdfx@major{#1}%
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\@pdfsource}
% Prepare to store the document's source, which defaults to the value of
% |\jobname|.
% \changes{v3.3}{2017/07/16}{Added this macro and the corresponding
%   \protect\optname{pdfsource} option, at Niklas Beisert's request}
%    \begin{macrocode}
\edef\@pdfsource{\jobname.tex}
\define@key{Hyp}{pdfsource}{\hyxmp@pdfstringdef\@pdfsource{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@DocumentID}
% Prepare to store a \acro{UUID} that represents the document.
% \changes{v3.5}{2018/11/27}{Added the \protect\optname{pdfdocumentid}
%   option, at Michael Osipov's request}
%    \begin{macrocode}
\def\hyxmp@DocumentID{}
\define@key{Hyp}{pdfdocumentid}{\hyxmp@pdfstringdef\hyxmp@DocumentID{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@InstanceID}
% Prepare to store a \acro{UUID} that represents the current instance of
% the document.
% \changes{v3.5}{2018/11/27}{Added the \protect\optname{pdfinstanceid}
%   option, at Michael Osipov's request}
%    \begin{macrocode}
\def\hyxmp@InstanceID{}
\define@key{Hyp}{pdfinstanceid}{\hyxmp@pdfstringdef\hyxmp@InstanceID{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfversionid}
% Prepare to store a string that represents the current version of
% the document.  It defaults to ``|1|''.
%    \begin{macrocode}
\def\@pdfversionid{1}
\define@key{Hyp}{pdfversionid}{\hyxmp@pdfstringdef\@pdfversionid{#1}}
%    \end{macrocode}
% \end{macro}
%
%    \begin{macrocode}
\RequirePackage{ifdraft}
%    \end{macrocode}
%
% \begin{macro}{\@pdfrendition}
% \changes{v5.0}{2020/02/27}{Added the \protect\optname{pdfrendition}
%   option}
% Prepare to store a tag describing how this rendition of the document
% differs from the master.  The default value is |default|, which
% indicates the master document, except in the case of
% |\documentclass[draft]|, for which |\@pdfrendition| defaults to
% |draft|.
%    \begin{macrocode}
\ifdraft{%
  \def\@pdfrendition{draft}%
}{%
  \def\@pdfrendition{default}%
}
\define@key{Hyp}{pdfrendition}{\hyxmp@pdfstringdef\@pdfrendition{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfpublication}
% Prepare to store the name of the publication in which the
% document was published.
%    \begin{macrocode}
\def\@pdfpublication{}
\define@key{Hyp}{pdfpublication}{\hyxmp@pdfstringdef\@pdfpublication{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfpubtype}
% Prepare to store the type of the publication in which the
% document was published.
%    \begin{macrocode}
\def\@pdfpubtype{}
\define@key{Hyp}{pdfpubtype}{\hyxmp@pdfstringdef\@pdfpubtype{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfbytes}
% Prepare to store the size of the file in bytes.
%    \begin{macrocode}
\def\@pdfbytes{}
\define@key{Hyp}{pdfbytes}{\hyxmp@pdfstringdef\@pdfbytes{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfnumpages}
% Prepare to store the number of pages in the file.
%    \begin{macrocode}
\def\@pdfnumpages{}
\define@key{Hyp}{pdfnumpages}{\hyxmp@pdfstringdef\@pdfnumpages{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfissn}
% Prepare to store the \acro{ISSN} of the publication in which the
% document was published.
%    \begin{macrocode}
\def\@pdfissn{}
\define@key{Hyp}{pdfissn}{\hyxmp@pdfstringdef\@pdfissn{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfeissn}
% Prepare to store the \acro{ISSN} of the electronic version of the
% publication in which the document was published.
%    \begin{macrocode}
\def\@pdfeissn{}
\define@key{Hyp}{pdfeissn}{\hyxmp@pdfstringdef\@pdfeissn{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfisbn}
% Prepare to store the \acro{ISBN} of the publication in which the
% document was published.
%    \begin{macrocode}
\def\@pdfisbn{}
\define@key{Hyp}{pdfisbn}{\hyxmp@pdfstringdef\@pdfisbn{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfbookedition}
% Prepare to store the edition of the book in which the document
% was published.
%    \begin{macrocode}
\def\@pdfbookedition{}
\define@key{Hyp}{pdfbookedition}{\hyxmp@pdfstringdef\@pdfbookedition{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfpublisher}
% Prepare to store the name of the document's publisher.
%    \begin{macrocode}
\def\@pdfpublisher{}
\define@key{Hyp}{pdfpublisher}{\hyxmp@pdfstringdef\@pdfpublisher{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfvolumenum}
% Prepare to store the volume identifier of the publication in which the
% document was published.
%    \begin{macrocode}
\def\@pdfvolumenum{}
\define@key{Hyp}{pdfvolumenum}{\hyxmp@pdfstringdef\@pdfvolumenum{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfissuenum}
% Prepare to store the identifier of the issue within a volume of the
% publication in which the document was published.
%    \begin{macrocode}
\def\@pdfissuenum{}
\define@key{Hyp}{pdfissuenum}{\hyxmp@pdfstringdef\@pdfissuenum{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfpagerange}
% Prepare to store the document's range of pages within the publication
% in which the document was published.
%    \begin{macrocode}
\def\@pdfpagerange{}
\define@key{Hyp}{pdfpagerange}{\hyxmp@pdfstringdef\@pdfpagerange{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfdoi}
% Prepare to store a \acro{DOI} that represents the current instance of
% the document.
%    \begin{macrocode}
\def\@pdfdoi{}
\define@key{Hyp}{pdfdoi}{\hyxmp@pdfstringdef\@pdfdoi{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfurl}
% Prepare to store a \acro{URL} that represents where the document
% can be found.  Note that we do not prepend \optname{baseurl} to
% the value provided.
%    \begin{macrocode}
\def\@pdfurl{}
\define@key{Hyp}{pdfurl}{\hyxmp@pdfstringdef\@pdfurl{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfsubtitle}
% Prepare to store the document's subtitle.
%    \begin{macrocode}
\def\@pdfsubtitle{}
\define@key{Hyp}{pdfsubtitle}{\hyxmp@pdfstringdef\@pdfsubtitle{#1}}
%    \end{macrocode}
% \end{macro}
%
% The following eight macros---|\@pdfcontactaddress|,
% |\@pdfcontactcity|, |\@pdfcontactregion|, |\@pdfcontactpostcode|,
% |\@pdfcontactcountry|, |\@pdfcontactphone|, |\@pdfcontactemail|, and
% |\@pdfcontacturl|---together specify how to contact the person or
% institution responsible for the document.
%
% \begin{macro}{\@pdfcontactaddress}
% Prepare to store a street address for the document's contact
% person\slash institution.  The \acro{IPTC} standard defines this as
% follows:
%
% \begin{quote}
%   The contact information address part. Comprises an optional company
%   name and all required information to locate the building or postbox
%   to which mail should be sent. To that end, the address is a
%   multiline field.
% \end{quote}
%
% For consistency with the rest of \pkgname{hyperxmp}, we use commas to
% separate terms, in this case, lines of the address.  The author can
% use |\xmpquote| and |\xmpcomma| to include literal commas.
%    \begin{macrocode}
\def\@pdfcontactaddress{}
\define@key{Hyp}{pdfcontactaddress}{%
  \let\xmpcomma=\hyxmp@comma
  \def\xmpquote##1{##1}%
  \hyxmp@pdfstringdef\@pdfcontactaddress{#1}%
  \def\xmpcomma{,}%
  \let\xmpquote=\relax
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfcontactcity}
% Prepare to store the city of the document's contact person\slash
% institution.
%    \begin{macrocode}
\def\@pdfcontactcity{}
\define@key{Hyp}{pdfcontactcity}{\hyxmp@pdfstringdef\@pdfcontactcity{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfcontactregion}
% Prepare to store the state or province of the document's contact
% person\slash institution.
%    \begin{macrocode}
\def\@pdfcontactregion{}
\define@key{Hyp}{pdfcontactregion}{\hyxmp@pdfstringdef\@pdfcontactregion{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfcontactpostcode}
% Prepare to store the postal code of the document's contact
% person\slash institution.
%    \begin{macrocode}
\def\@pdfcontactpostcode{}
\define@key{Hyp}{pdfcontactpostcode}{\hyxmp@pdfstringdef\@pdfcontactpostcode{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfcontactcountry}
% Prepare to store the country of the document's contact person\slash
% institution.
%    \begin{macrocode}
\def\@pdfcontactcountry{}
\define@key{Hyp}{pdfcontactcountry}{\hyxmp@pdfstringdef\@pdfcontactcountry{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfcontactphone}
% Prepare to store the telephone number of the document's contact
% person\slash institution.
%    \begin{macrocode}
\def\@pdfcontactphone{}
\define@key{Hyp}{pdfcontactphone}{\hyxmp@pdfstringdef\@pdfcontactphone{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfcontactemail}
% Prepare to store the email address of the document's contact
% person\slash institution.
%    \begin{macrocode}
\def\@pdfcontactemail{}
\define@key{Hyp}{pdfcontactemail}{\hyxmp@pdfstringdef\@pdfcontactemail{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@pdfcontacturl}
% Prepare to store the \acro{URL} of the document's contact person\slash
% institution.
%    \begin{macrocode}
\def\@pdfcontacturl{}
\define@key{Hyp}{pdfcontacturl}{\hyxmp@pdfstringdef\@pdfcontacturl{#1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@no@info@lists}
% Suppress \pkgname{hyperref} from writing \pdfterm{Author} and
% \pdfterm{Keywords} into the \pdfterm{Info} dictionary.  This prevents
% conflicts between the \acro{PDF} metadata and the \acro{XMP} metadata
% that cause \acro{PDF/A} validation to fail.  The \acro{PDF} metadata
% can be restored by passing the \optname{keeppdfinfo} option to
% |\hypersetup|.
% \changes{v4.0}{2019/03/31}{Added this macro}
% \changes{v5.0}{2020/03/10}{Renamed this macros from
%   \protect\cs{hyxmp@suppress@pdf@metadata} and rewrote it to replace,
%   if possible, only \protect\pdfterm{Author} and \protect\pdfterm{Keywords}}
%    \begin{macrocode}
\def\hyxmp@no@info@lists{%
%    \end{macrocode}
% \begin{macro}{\hyxmp@suppress@pdf@info}
% \begin{macro}{\next}
% If |\patchcmd| fails for any reason---most likely, a modification to
% the \pkgname{hyperref} package---our fallback is to prevent
% \pkgname{hyperref} from writing \emph{any} data to the \acro{PDF}
% \pdfterm{Info} dictionary.
%    \begin{macrocode}
  \def\hyxmp@suppress@pdf@info{%
    \global\let\PDF@FinishDoc=\@empty
    \PackageWarningNoLine{hyperxmp}{%
      Suppressing the _entire_ PDF Info dictionary.\MessageBreak
      Please notify the hyperxmp maintainer%
    }%
  }%
  \let\next=\relax
  \patchcmd
    {\PDF@FinishDoc}%
    {/Author(\@pdfauthor)}%
    {}%
    {}%
    {\let\next=\hyxmp@suppress@pdf@info}%
  \patchcmd
    {\PDF@FinishDoc}%
    {/Keywords(\@pdfkeywords)}%
    {}%
    {}%
    {\let\next=\hyxmp@suppress@pdf@info}%
  \next
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%    \begin{macrocode}
\define@key{Hyp}{keeppdfinfo}[true]{%
  \gdef\hyxmp@no@info@lists{}%
}
%    \end{macrocode}
%
% \changes{v2.1}{2012/09/16}{Enabled \protect\pkgname{hyperxmp} and
%   \protect\pkgname{hyperref} to be loaded in either order.  This addresses
%   a bug report by Yury Donskoy}
%
% We need to capture list arguments (viz.~\optname{pdfauthor} and
% \optname{pdfkeywords}) before \pkgname{hyperref} converts them to
% \term{PDFDocEncoding}.  Otherwise, |\xmpcomma| is permanently replaced
% with a comma, and we lose our ability to change it to a
% |\hyxmp@comma|.  We therefore need to augment \pkgname{hyperref}'s
% option processing with our own.  Because \pkgname{hyperref} has not
% yet been loaded we need to ensure that our augmentation gets loaded in
% the future: after the |\usepackage{hyperref}| but before options are
% passed to that package.
%
% For lack of a better approach, \pkgname{hyperxmp} redefines
% |\ProcessKeyvalOptions| to alter the way \pkgname{hyperref} processes
% \optname{pdfauthor} and \optname{pdfkeywords}.  This is somewhat
% heavy-handed as it gets executed for \emph{every} subsequently loaded
% package that uses |\ProcessKeyvalOptions|, but at least it does what
% we need.  \pkgname{hyperxmp} also redefines |\hypersetup| to do the
% same thing.  This is required in case \pkgname{hyperref} is loaded
% before \pkgname{hyperxmp}.
%
% \begin{macro}{\hyxmp@pdfauthor}
% \begin{macro}{\hyxmp@pdfkeywords}
% Prepare to store the name of the author and a list of keywords.
%    \begin{macrocode}
\def\hyxmp@pdfauthor{}
\def\hyxmp@pdfkeywords{}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@redefine@Hyp}
% If not already redefined, redefine \pkgname{hyperref}'s
% \optname{pdfauthor} and \optname{pdfkeywords} options to properly
% handle |\xmpcomma| and |\xmpquote|.
% \changes{v2.1}{2012/09/16}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@redefine@Hyp}{%
%    \end{macrocode}
% \begin{macro}{\hyxmp@Hyp@pdfauthor}
% Store the old definition of |\KV@Hyp@pdfauthor| in
% |\hyxmp@Hyp@pdfauthor|, but only if we see that |\KV@Hyp@pdfauthor| is
% defined and |\hyxmp@Hyp@pdfauthor| isn't.  Otherwise, we'd be defining
% |\hyxmp@Hyp@pdfauthor| in terms of itself and creating an infinite
% loop.
%    \begin{macrocode}
  \@ifundefined{KV@Hyp@pdfauthor}{}{%
    \@ifundefined{hyxmp@Hyp@pdfauthor}{%
      \expandafter\let\expandafter\hyxmp@Hyp@pdfauthor
        \csname KV@Hyp@pdfauthor\endcsname
    }{}%
  }%
%    \end{macrocode}
% \begin{macro}{\KV@Hyp@pdfauthor}
% \begin{macro}{\xmpcomma}
% \begin{macro}{\xmpquote}
% \begin{macro}{\hyxmp@and}
% \begin{macro}{\and}
% \begin{macro}{\hyxmp@pdfauthor}
% \begin{macro}{\@pdfauthor}
% Redefine |\KV@Hyp@pdfauthor| to process its argument twice.  The first
% time, |\xmpcomma| is defined as a placeholder character
% (|\hyxmp@comma|) and |\xmpquote| as the identity function.  The result
% is stored in |\hyxmp@pdfauthor| for use in structured lists (those
% surrounding each entry with |<rdf:li>|).  The second time, |\xmpcomma|
% is defined as an ordinary comma, and |\xmpquote| is defined as a macro
% that puts its argument within double quotes.  The result is stored in
% |\@pdfauthor| for use in unstructured lists (those in which the entire
% list appears within a single pair of tags).  In case
% \optname{pdfauthor} is left unspecified and we copy |\author|'s
% argument to \optname{pdfauthor}, we temporarily redefine |\and| as the
% list separator when producing a structured list and as ``|and|'' when
% producing an unstructured list.
%    \begin{macrocode}
  \define@key{Hyp}{pdfauthor}{%
    \let\xmpcomma=\hyxmp@comma
    \def\xmpquote####1{####1}%
    \let\hyxmp@and=\and
    \def\and{,}%
    \hyxmp@Hyp@pdfauthor{##1}%
    \global\let\hyxmp@pdfauthor=\@pdfauthor
    \def\and{and\space}%
    \def\xmpcomma{,}%
    \def\xmpquote####1{"####1"}%
    \hyxmp@Hyp@pdfauthor{##1}%
    \def\xmpcomma{,}%
    \let\xmpquote=\relax
    \let\and=\hyxmp@and
  }%
%    \end{macrocode}
% \begin{macro}{\hyxmp@Hyp@pdfkeywords}
% The previous block of code now repeats for the keyword list, starting
% by storing the old definition of |\KV@Hyp@pdfkeywords| in
% |\hyxmp@Hyp@pdfkeywords|.
%    \begin{macrocode}
  \@ifundefined{KV@Hyp@pdfkeywords}{}{%
    \@ifundefined{hyxmp@Hyp@pdfkeywords}{%
      \expandafter\let\expandafter\hyxmp@Hyp@pdfkeywords
        \csname KV@Hyp@pdfkeywords\endcsname
    }{}%
  }%
%    \end{macrocode}
% \begin{macro}{\KV@Hyp@pdfkeywords}
% \begin{macro}{\xmpcomma}
% \begin{macro}{\xmpquote}
% \begin{macro}{\hyxmp@pdfkeywords}
% \begin{macro}{\@pdfkeywords}
% Redefine |\KV@Hyp@pdfkeywords| to process its argument twice.  The
% first time, |\xmpcomma| is defined as a placeholder character
% (|\hyxmp@comma|) and |\xmpquote| as the identity function.  The
% result is stored in |\hyxmp@pdfkeywords| for use in structured lists
% (those surrounding each entry with |<rdf:li>|).  The second time,
% |\xmpcomma| is defined as an ordinary comma, and |\xmpquote| is
% defined as a macro that puts its argument within double quotes.  The
% result is stored in |\@pdfkeywords| for use in unstructured lists
% (those in which the entire list appears within a single pair of tags).
%    \begin{macrocode}
  \define@key{Hyp}{pdfkeywords}{%
    \let\xmpcomma=\hyxmp@comma
    \def\xmpquote####1{####1}%
    \hyxmp@Hyp@pdfkeywords{##1}%
    \global\let\hyxmp@pdfkeywords=\@pdfkeywords
    \def\xmpcomma{,}%
    \def\xmpquote####1{"####1"}%
    \hyxmp@Hyp@pdfkeywords{##1}%
    \def\xmpcomma{,}%
    \let\xmpquote=\relax
  }%
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@ProcessKeyvalOptions}
% \changes{v2.0}{2012/09/05}{Added this macro}
% \begin{macro}{\ProcessKeyvalOptions}
% \changes{v2.0}{2012/09/05}{Added this macro}
% Redefine \pkgname{kvoptions}'s |\ProcessOptions| command to invoke
% |\hyxmp@redefine@Hyp| before performing its normal option processing.
%    \begin{macrocode}
\let\hyxmp@ProcessKeyvalOptions=\ProcessKeyvalOptions
\renewcommand*{\ProcessKeyvalOptions}{%
  \hyxmp@redefine@Hyp
  \hyxmp@ProcessKeyvalOptions
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@hypersetup}
% \changes{v2.1}{2012/09/16}{Added this macro}
% \begin{macro}{\hypersetup}
% \changes{v2.1}{2012/09/16}{Added this macro}
% Redefine \pkgname{hyperref}'s |\hypersetup| command to invoke
% |\hyxmp@redefine@Hyp| before performing its normal option processing.
%    \begin{macrocode}
\let\hyxmp@hypersetup=\hypersetup
\def\hypersetup{%
  \hyxmp@redefine@Hyp
  \hyxmp@hypersetup
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@find@metadata}
% \begin{macro}{\hyxmp@concated@metadata}
% Issue a warning message if the author failed to specify any metadata
% at all.  This excludes metadata that is included automatically such as
% the current timestamp.  Note that we don't consider |\@pdfmetalang| as
% metadata as that value is meaningful only when used in conjunction
% with other information.  We also don't examine |\@pdfapart| or
% |\@pdfaconformance| because those have nonempty default values.
%    \begin{macrocode}
\newcommand*{\hyxmp@find@metadata}{%
  \edef\hyxmp@concated@metadata{%
    \@baseurl
    \@pdfauthor
    \@pdfauthortitle
    \@pdfbookedition
    \@pdfbytes
    \@pdfcaptionwriter
    \@pdfcontactaddress
    \@pdfcontactcity
    \@pdfcontactcountry
    \@pdfcontactemail
    \@pdfcontactphone
    \@pdfcontactpostcode
    \@pdfcontactregion
    \@pdfcontacturl
    \@pdfcopyright
    \@pdfcreationdate
    \@pdfdatetime
    \@pdfdoi
    \@pdfeissn
    \@pdfisbn
    \@pdfissn
    \@pdfissuenum
    \@pdfkeywords
    \@pdflang
    \@pdflicenseurl
    \@pdfmetadatetime
    \@pdfmoddate
    \@pdfnumpages
    \@pdfpagerange
    \@pdfpublication
    \@pdfpubtype
    \@pdfsubject
    \@pdfsubtitle
    \@pdftitle
    \@pdfuapart
    \@pdfurl
    \@pdfvolumenum
    \@pdfxstandard
  }%
  \ifx\hyxmp@concated@metadata\@empty
    \PackageWarningNoLine{hyperxmp}{%
      \jobname.tex did not specify any metadata to\MessageBreak
      include in the XMP packet.\space\space Please see the\MessageBreak
      hyperxmp documentation for instructions on how to\MessageBreak
      provide metadata values to hyperxmp}%
  \fi
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@check@standards}
% Most \acro{PDF} standards require that certain metadata be present.
% If compliance with a \acro{PDF} standard is claimed but any of the
% metadata it requires are absent, issue a warning message.
% \changes{v5.0}{2020/03/11}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@check@standards}{%
%    \end{macrocode}
% If the \optname{pdfa} option was passed to \pkgname{hyperref} but
% |\@pdfapart| is not set, set it to~|1| and |\@pdfaconformance| to~|B|.
%    \begin{macrocode}
  \ifHy@pdfa
    \@ifmtargexp{\@pdfapart}{%
      \PackageWarningNoLine{hyperxmp}{%
        `pdfa' was passed to hyperref, but `pdfapart' was\MessageBreak
        not specified.\space\space  Setting pdfapart to `1' and\MessageBreak
        pdfaconformance to `B'%
      }%
      \gdef\@pdfapart{1}%
      \gdef\@pdfaconformance{B}%
    }%
  \fi
%    \end{macrocode}
%
% \begin{macro}{\hyxmp@standards}
% We define |\hyxmp@standards| to be non-empty if \emph{any} \acro{PDF}
% standard is claimed (currently, \acro{PDF/A}, \acro{PDF/X}, or
% \acro{PDF/UA}.
%    \begin{macrocode}
  \edef\hyxmp@standards{%
    \@pdfapart
    \@pdfxstandard
    \@pdfuapart
  }%
%    \end{macrocode}
% Check that a document title was provided and is non-empty.
%    \begin{macrocode}
  \@ifnotmtargexp{\hyxmp@standards}{%
    \@ifmtargexp{\@pdftitle}{%
      \PackageWarningNoLine{hyperxmp}{%
        Missing pdftitle (required for PDF standards\MessageBreak
        compliance)%
      }%
    }%
  }%
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% Rather than load \pkgname{hyperref} ourself we let the author do it
% then verify he actually did.  This approach gives the author the
% flexibility to load \pkgname{hyperxmp} and \pkgname{hyperref} in
% either order and to call |\hypersetup| anywhere in the document's
% preamble, not just before \pkgname{hyperxmp} is loaded.
%    \begin{macrocode}
\AtBeginDocument{%
  \@ifpackageloaded{hyperref}{%
%    \end{macrocode}
% In older versions of \pkgname{hyperref}, |\@pdflang| is set to
% |\@empty| if \optname{pdflang} is not specified.  In newer versions of
% \pkgname{hyperref}, |\@pdflang| is set to |\relax| if
% \optname{pdflang} is not specified.  The latter is a bit problematic
% for \pkgname{hyperxmp} because it makes |\@pdflang| non-expandable,
% which causes a literal ``|\@pdflang|'' to be written as \acro{XMP}
% metadata.  To avoid that situation we redefine |\@pdflang| as
% |\@empty| if we see it set to |\relax|.
% \changes{v2.3a}{2013/04/16}{Bug fix: Redefine \cs{@pdflang} as
%   \cs{@empty} when \protect\pkgname{hyperref} has set
%   it to \cs{relax}}
%    \begin{macrocode}
    \ifx\@pdflang\relax
      \let\@pdflang=\@empty
    \fi
%    \end{macrocode}
% If the author explicitly specified the language to use for the
% document's metadata, we use that.  If not, we use the document
% language, specified to \pkgname{hyperref} with the \protect\optname{pdflang}
% option.  If the author did not specify a language, we use |x-default|
% as the metadata language.
% \changes{v1.3}{2011/04/25}{Introduced the \protect\optname{pdfmetalang}
%   package option, which enables an author to specify the language in which he
%   wrote the document's metadata}
% \changes{v2.0}{2012/08/02}{New \cs{AtBeginDocument} code from Heiko
%   Oberdiek to properly encode \cs{@pdfmetalang}}
% \changes{v3.3}{2017/07/21}{Don't overwrite an existing
%   \protect\optname{pdfmetalang} with \protect\optname{pdflang} or
%   \protect\texttt{x-default}.  This addresses a bug report by Niklas
%   Beisert}
%    \begin{macrocode}
    \ifx\@pdfmetalang\@empty
      \ifx\@pdflang\@empty
        \let\@pdfmetalang=\hyxmp@x@default
      \else
        \edef\@pdfmetalang{\@pdflang}%
      \fi
    \fi
    \hyxmp@xmlify\@pdfmetalang
%    \end{macrocode}
% \changes{v5.0}{2020/03/17}{Don't set any document dates (creation,
%   modification, or metadata) from \string\optname{pdfdate}}
% If the author left \optname{pdftitle} blank but specified |\title|,
% use the title for \optname{pdftitle}.  Likewise, if the author left
% \optname{pdfauthor} blank but specified |\author|, use the author for
% \optname{pdfauthor}.
% \changes{v2.7}{2016/02/01}{Automatically use \cs{title} and \cs{author}
%   if \protect\optname{pdftitle} and \protect\optname{pdfauthor} are left
%   unspecified.   Thanks to Maciej Radziejewski for the suggestion}
%    \begin{macrocode}
    \@ifmtargexp{\@pdftitle}{%
      \@ifnotmtargexp{\@title}{%
        \hypersetup{pdftitle={\@title}}%
      }%
    }%
    {}%
    \@ifmtargexp{\@pdfauthor}{%
      \@ifnotmtargexp{\@author}{%
        \hypersetup{pdfauthor={\@author}}%
      }%
    }%
    {}%
%    \end{macrocode}
% Most \acro{PDF} standards dictate that if the same metadata appear in
% both the \acro{XMP} packet and the \acro{PDF} \pdfterm{Info}
% dictionary, the metadata must match.  This requirement poses a problem
% for a user-unspecified \optname{pdfcreationdate} in the context of
% \XeLaTeX\@.  In this case we explicitly define |\@pdfcreationdate| as
% |\hyxmp@today@pdf| to prevent the \cmdname{xdvipdfmx} back-end
% processor from detecting a missing \pdfterm{CreationDate} in the
% \pdfterm{Info} dictionary and adding its own---typically a few seconds
% after \pkgname{hyperxmp} has constructed an \xmpprop{xmp:CreateDate}
% for the \acro{XMP} metadata and leading to a metadata mismatch.
%    \begin{macrocode}
    \@ifundefined{XeTeXversion}{}{%
      \@ifmtargexp{\@pdfcreationdate}{%
        \let\@pdfcreationdate=\hyxmp@today@pdf
      }%
      {}%
    }%
%    \end{macrocode}
% If the document claims to comply with one or more \acro{PDF}
% standards, check that all of the requisite metadata are present.
%    \begin{macrocode}
    \hyxmp@check@standards
%    \end{macrocode}
% Older versions of \pkgname{hyperref} write the \pdfterm{Info}
% dictionary to the \acro{PDF} file at the end of the document.  New
% versions of \pkgname{hyperref} write the \pdfterm{Info} dictionary to
% the \acro{PDF} file at the \emph{beginning} of the document.  For
% compatibility with both old and new \pkgname{hyperref} implementations
% we suppress writing the \pdfterm{Info} dictionary here, at the
% beginning of the document.
% \changes{v4.1}{2019/04/02}{Invoke
%   \protect\cs{hyxmp@no@info@lists} at the beginning of the
%   document, for compatibility with both newer and older versions of
%   \protect\pkgname{hyperref}}
%    \begin{macrocode}
    \hyxmp@no@info@lists
%    \end{macrocode}
% We wait until the end of the document to construct the \acro{XMP}
% packet and write it to the \acro{PDF} document catalog.  This gives
% the author ample opportunity to provide metadata to \pkgname{hyperref}
% and thereby \pkgname{hyperxmp}.
%    \begin{macrocode}
    \hyxmp@at@end{%
      \hyxmp@find@metadata
      \hyxmp@embed@packet
    }%
  }{%
    \PackageWarningNoLine{hyperxmp}{%
      \jobname.tex failed to include a\MessageBreak
      \string\usepackage\string{hyperref\string}
      in the preamble.\MessageBreak
      Consequently, all hyperxmp functionality will be\MessageBreak
      disabled}%
  }%
}
%    \end{macrocode}
%
%
% \subsection{Manipulating author-supplied data}
%
% The author provides metadata information to \pkgname{hyperxmp} via
% package options to \pkgname{hyperref} or via \pkgname{hyperref}'s
% |\hypersetup| command.  The functions in this section convert
% author-supplied lists (e.g.,~|pdfkeywords={foo, bar, baz}|) into
% \LaTeX\ lists (e.g.,~|\@elt {foo}| |\@elt {bar}| |\@elt {baz}|) that
% can be more easily manipulated (Section~\ref{sec:list-manip}); parse
% dates in both \acro{PDF} and \acro{XMP} formats
% (Section~\ref{sec:date-manip}; trim spaces off the ends of strings
% (Section~\ref{sec:trim-spaces}); convert text to \acro{XML}
% (e.g.,~from |<scott+hyxmp@pakin.org>| to
% |&lt;scott+hyxmp@pakin.org&gt;|) (Section~\ref{sec:text-xml});
% simplify the pretty-printing of a begin tag, \acro{XML} text, and end
% tag (Section~\ref{sec:output-xml}; and provide metadata in multiple
% languages (Section~\ref{sec:lang-alt}).
%
% \subsubsection{List manipulation}
% \label{sec:list-manip}
%
% We define a macro for converting a list of comma-separated elements
% (e.g.,~the list of \acro{PDF} keywords) to a list of \LaTeX\
% |\@elt|-separated elements.
%
% \begin{macro}{\hyxmp@commas@to@list}
% Given a macro name~(|#1|) and a comma-separated list~(|#2|), define
% the macro name as the elements of the list, each preceded by |\@elt|.
% (Executing the macro therefore applies |\@elt| to each element in
% turn.)
%    \begin{macrocode}
\newcommand*{\hyxmp@commas@to@list}[2]{%
  \gdef#1{}%
  \expandafter\hyxmp@commas@to@list@i\expandafter#1#2,,%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@commas@to@list@i}
% \begin{macro}{\next}
% Recursively construct macro~|#1| from comma-separated list~|#2|.  Stop
% if |#2| is empty.
%    \begin{macrocode}
\def\hyxmp@commas@to@list@i#1#2,{%
  \gdef\hyxmp@sublist{#2}%
  \ifx\hyxmp@sublist\@empty
    \let\next=\relax
  \else
    \hyxmp@trimspaces\hyxmp@sublist
    \@cons{#1}{{\hyxmp@sublist}}%
    \def\next{\hyxmp@commas@to@list@i{#1}}%
  \fi
  \next
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\xmpcomma}
% Because \pkgname{hyperxmp} splits lists at commas, a comma cannot
% normally be used within a list.  We there provide an |\xmpcomma| macro
% that can expand to either a true comma or a placeholder character
% depending on the situation.  Here, we bind it to a comma so it can be
% used in \emph{any} \pkgname{hyperxmp} option, not just those that treat
% commas specially.
% \changes{v2.0}{2012/08/25}{Added this macro}
% \changes{v2.2}{2012/12/07}{Changed the default from
%   \texttt{\string\string\string\relax} to an ordinary comma}
%    \begin{macrocode}
\def\xmpcomma{,}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@comma}
% This is what |\xmpcomma| maps to during list construction.  We assume
% that documents will never otherwise use an \acro{ETX} (|^^C|)
% character in their \acro{XMP} metadata.
% \changes{v2.0}{2012/08/25}{Added this macro}
%    \begin{macrocode}
\bgroup
  \catcode`\^^C=11
  \gdef\hyxmp@comma{^^C}
\egroup
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@uscore}
% This is what |\_| temporarily maps to during packet construction.
% Because underscores are replaced by spaces, we need a mechanism to
% preserve user-specified underscores (e.g.,~in email addresses).  We
% assume that documents will never otherwise use an \acro{NAK} (|^^U|)
% character in their \acro{XMP} metadata.
% \changes{v2.5}{2014/06/19}{Added this macro}
%    \begin{macrocode}
\bgroup
  \catcode`\^^U=11
  \gdef\hyxmp@uscore{^^U}
\egroup
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\xmpquote}
% Adobe Acrobat likes to see double quotes around list elements that
% contain commas when the entire list appears within a single \acro{XMP}
% tag (e.g.,~|<pdf:Keywords>|).  However, it doesn't like to see double
% quotes around list elements that contain commas when the list is
% broken up into individual components (i.e.,~using |<rdf:li>| tags).
% We therefore introduce an |\xmpquote| macro that quotes or doesn't
% quote its argument based on context.  Here, we bind |\xmpquote| to
% |\relax| to prevent it from prematurely quoting or not quoting.
% \changes{v2.0}{2012/09/10}{Added this macro}
%    \begin{macrocode}
\let\xmpquote=\relax
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\xmptilde}
% As a convenience for the user, we define |\xmptilde| as a category~12
% (other) ``|~|'' character.
% \changes{v2.4}{2014/01/01}{Added this macro}
%    \begin{macrocode}
\bgroup
  \catcode`\~=12%
  \gdef\xmptilde{~}%
\egroup
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\XMPTruncateList}
% \changes{v2.0}{2012/09/07}{Added this macro}
% \changes{v2.3b}{2013/07/18}{Made all definitions local to avoid
%   spurious \texttt{Too many unprocessed floats} errors when running
%   with \string\pkgname{memoir}}
% \changes{v4.0}{2019/03/31}{Deprecated this macro}
% \begin{macro}{\hyxmp@temp@str}
% \begin{macro}{\hyxmp@temp@list}
% \begin{macro}{\@elt}
% As a workaround for the inability of older Adobe Acrobat versions to
% display author lists correctly we introduce a hack that replaces a
% list with its first element.  One can then write
% ``|\XMPTruncateList{pdfauthor}|'' and have Adobe Acrobat display the
% author list correctly.
%    \begin{macrocode}
\newcommand{\XMPTruncateList}[1]{{%
    \PackageWarning{hyperxmp}{%
      \noexpand\XMPTruncateList has been deprecated since\MessageBreak
      hyperxmp 4.0 and may be removed in future\MessageBreak
      versions of the package.  \noexpand\XMPTruncateList\MessageBreak
      was found}%
  \edef\hyxmp@temp@str{\csname hyxmp@#1\endcsname}%
  \hyxmp@commas@to@list{\hyxmp@temp@list}{\hyxmp@temp@str}%
  \def\@elt##1{%
    \expandafter\gdef\csname @#1\endcsname{##1}%
    \let\@elt=\@gobble
  }
  \hyxmp@temp@list
}}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
%
%
% \subsubsection{Date manipulation}
% \label{sec:date-manip}
%
% \pkgname{hyperxmp} needs to manipulate two types of date (really,
% timestamp) formats: \acro{PDF} format and \acro{XMP} format.
% \acro{PDF} timestamps are of the form
% ``|D:|\textsc{yyyymmdd}hhmmss|+|\textsc{tt}|'|tt|'|''
% \makeatletter
% \@ifundefined{pdffeedback}{^^A
%   \@ifundefined{pdfcreationdate}{^^A
%   }{^^A
%     (e.g.,~\texttt{\pdfcreationdate})^^A
%   }^^A
% }{^^A
%   (e.g.,~\texttt{\pdffeedback creationdate})^^A
% }
% \makeatother
% ~\cite{Adobe2008:PDF}, while \acro{XMP} timestamps are of the form
% ``\textsc{yyyy}|-|\textsc{mm}|-|\textsc{dd}|T|hh|:|mm|:|ss|+|\textsc{tt}|:|tt''
% \makeatletter
% \@ifundefined{pdffeedback}{^^A
%   \@ifundefined{pdfcreationdate}{^^A
%     \unskip
%   }{^^A
%     (e.g.,~\texttt{\expandafter\hyxmp@pdf@to@xmp@date\pdfcreationdate})^^A
%   }^^A
% }{^^A
%   (e.g.,~\texttt{\expandafter\hyxmp@pdf@to@xmp@date\pdffeedback creationdate})^^A
% }^^A
% \makeatother
% ~\cite{Adobe2012:XMP}.  The |\hyxmp@as@pdf@date| and
% |\hyxmp@as@xmp@date| macros defined in this section facilitate
% timestamp conversions to \acro{PDF} and \acro{XMP} formats,
% respectively.
%
% \begin{macro}{\hyxmp@first@char}
% \begin{macro}{\hyxmp@first@char@i}
% Return the first character of a string.  This macro is fully expandable.
%    \begin{macrocode}
\def\hyxmp@first@char#1{\hyxmp@first@char@i#1\relax}
\def\hyxmp@first@char@i#1#2\relax{#1}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@as@xmp@date}
% If necessary, convert a timestamp to \acro{XMP} format.  That is, if
% the timestamp is in \acro{PDF} format, convert it; otherwise, leave it
% unmodified.  This macro is fully expandable.
% \changes{v3.2}{2017/02/20}{Added this macro}
%    \begin{macrocode}
\def\hyxmp@as@xmp@date#1{%
  \expandafter\ifnum\expandafter`\hyxmp@first@char@i#1\relax=`D
    \hyxmp@pdf@to@xmp@date{#1}%
  \else
    #1%
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@pdf@to@xmp@date}
% Convert a timestamp from \acro{PDF} format to \acro{XMP} format.  This
% macro is fully expandable.
% \changes{v2.4}{2013/12/24}{Added this macro}
%    \begin{macrocode}
\def\hyxmp@pdf@to@xmp@date#1:#2#3#4#5#6#7#8#9{%
  #2#3#4#5-#6#7-#8#9%
  \hyxmp@parse@time
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@parse@time}
% This is a helper function for |\hyxmp@pdf@to@xmp@date|.
% |\hyxmp@pdf@to@xmp@date| proper parses only the year, month, and day
% then calls |\hyxmp@parse@time|.  |\hyxmp@parse@time| parses the
% hours, minutes, and seconds then calls |\hyxmp@parse@tz@char|.
% \changes{v2.4}{2013/12/24}{Added this macro}
%    \begin{macrocode}
\def\hyxmp@parse@time#1#2#3#4#5#6{%
  T#1#2:#3#4:#5#6%
  \hyxmp@parse@tz@char
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@parse@tz@char}
% This is another helper function for |\hyxmp@pdf@to@xmp@date|.  So far,
% the date and time have been parsed.  |\hyxmp@parse@tz@char| parses the
% first character of the timezone descriptor.  This can be one of
% ``|+|'' for eastern timezones (\mbox{UTC$+x$}, including Asia,
% Oceania, and most of Europe), ``|-|'' for western timezones
% (\mbox{UTC$-x$}, primarily the Americas), or ``|Z|'' for Zulu time
% (\mbox{UTC$+0$}).  Timezones beginning with ``|+|'' or ``|-|'' are
% followed by an offset in hours and minutes (parsed by
% |\hyxmp@parse@tz|; timezones beginning with ``|Z|'' are not.
% \changes{v2.4}{2013/12/24}{Added this macro}
%    \begin{macrocode}
\def\hyxmp@parse@tz@char#1{%
  #1%
  \ifx#1-%
    \expandafter\hyxmp@parse@tz
  \else
    \ifx#1+%
      \expandafter\hyxmp@parse@tz
    \fi
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@parse@tz}
% This is the final helper function for |\hyxmp@pdf@to@xmp@date|.  It
% parses the piece of the timezone comprising the offset from
% Coordinated Universal Time, measured in hours and minutes.
% \changes{v2.4}{2013/12/24}{Added this macro}
%    \begin{macrocode}
\def\hyxmp@parse@tz#1'#2'{%
  #1:#2%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@as@pdf@date}
% If necessary, convert a timestamp to \acro{PDF} format.  That is, if
% the timestamp is in \acro{XMP} format, convert it; otherwise, leave it
% unmodified.  This macro is fully expandable.
% \changes{v3.2}{2017/02/20}{Added this macro}
%    \begin{macrocode}
\def\hyxmp@as@pdf@date#1{%
  \expandafter\ifx\hyxmp@first@char@i#1\relax D%
    #1%
  \else
    \hyxmp@xmp@to@pdf@date{#1}%
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@xmp@to@pdf@date}
% Convert a timestamp from \acro{XMP} format to \acro{PDF} format.  This
% macro is fully expandable.
% \changes{v2.4}{2013/12/24}{Added this macro}
%    \begin{macrocode}
\def\hyxmp@xmp@to@pdf@date#1{%
  D:\hyxmp@xmp@to@pdf@date@i#1\relax\relax
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@xmp@to@pdf@date@i}
% Parse the year for |\hyxmp@xmp@to@pdf@date|.
%    \begin{macrocode}
\def\hyxmp@xmp@to@pdf@date@i#1#2#3#4#5#6{%
  #1#2#3#4%
  \ifx#5-%
    \expandafter\hyxmp@xmp@to@pdf@date@ii\expandafter#6%
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@xmp@to@pdf@date@ii}
% Parse the month for |\hyxmp@xmp@to@pdf@date|.
%    \begin{macrocode}
\def\hyxmp@xmp@to@pdf@date@ii#1#2#3#4{%
  #1#2%
  \ifx#3-%
    \expandafter\hyxmp@xmp@to@pdf@date@iii\expandafter#4%
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@xmp@to@pdf@date@iii}
% Parse the day for |\hyxmp@xmp@to@pdf@date|.
%    \begin{macrocode}
\def\hyxmp@xmp@to@pdf@date@iii#1#2#3#4{%
  #1#2%
  \ifx#3T%
    \expandafter\hyxmp@xmp@to@pdf@date@iv\expandafter#4%
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@xmp@to@pdf@date@iv}
% Parse the hour for |\hyxmp@xmp@to@pdf@date|.
%    \begin{macrocode}
\def\hyxmp@xmp@to@pdf@date@iv#1#2#3#4{%
  #1#2%
  \ifx#3:%
    \expandafter\hyxmp@xmp@to@pdf@date@v\expandafter#4%
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@xmp@to@pdf@date@v}
% Parse the minute for |\hyxmp@xmp@to@pdf@date|.
%    \begin{macrocode}
\def\hyxmp@xmp@to@pdf@date@v#1#2#3#4{%
  #1#2%
  \ifx#3:%
    \expandafter\hyxmp@xmp@to@pdf@date@vi\expandafter#4%
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@gobbletwo}
% This is exactly the same as \LaTeXe's |\@gobbletwo| but needs to be a
% different literal for |\hyxmp@xmp@to@pdf@date@vii|'s pattern-matching
% to work.
%    \begin{macrocode}
\let\hyxmp@gobbletwo=\@gobbletwo
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@xmp@to@pdf@date@vi}
% Parse the second for |\hyxmp@xmp@to@pdf@date|.  The challenge here is
% that we need to handle four cases for the character following the
% seconds---``|+|'', ``|-|'', ``|Z|'', and no character---without sacrificing
% expandability.  Our tricky solution is to insert a |\@gobbletwo| as a
% sentinel and let |\hyxmp@xmp@to@pdf@date@vi| discard everything up to
% that sentinel (i.e.,~all the other conditionals).
%    \begin{macrocode}
\def\hyxmp@xmp@to@pdf@date@vi#1#2#3#4{%
  #1#2%
  \ifx#3+%
    +\expandafter\hyxmp@xmp@to@pdf@date@vii
  \fi
  \ifx#3-%
    -\expandafter\hyxmp@xmp@to@pdf@date@vii
  \fi
  \ifx#3Z%
    Z%
  \fi
  \ifx#3\relax
    \expandafter\hyxmp@gobbletwo
  \fi
  \@gobbletwo #4%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@xmp@to@pdf@date@vii}
% Parse the time-zone hours for |\hyxmp@xmp@to@pdf@date|.
%    \begin{macrocode}
\def\hyxmp@xmp@to@pdf@date@vii#1\@gobbletwo#2#3#4#5{%
  #2#3%
  \ifx#4:%
    \expandafter\hyxmp@xmp@to@pdf@date@viii\expandafter#5%
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@xmp@to@pdf@date@viii}
% Parse the time-zone minutes for |\hyxmp@xmp@to@pdf@date|.
%    \begin{macrocode}
\def\hyxmp@xmp@to@pdf@date@viii#1#2#3#4{%
  '#1#2'%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@today@xmp@define}
% Use \tex\ primitives to define a given macro as today's date in
% \textsc{yyyy}-\textsc{mm}-\textsc{dd}|T|hh|:|mm|Z| format.
% \changes{v2.4}{2013/12/21}{Added this macro}
% \changes{v3.0}{2016/07/03}{Modified to accept the name of a macro
%   to define}
% \changes{v3.2}{2017/02/21}{Modified to include hours and minutes}
% \changes{v5.0}{2020/03/16}{Modified to specify UTC}
%    \begin{macrocode}
\def\hyxmp@today@xmp@define#1{%
%    \end{macrocode}
% The date is a straightforward representation of \tex's |\year|,
% |\month|, and |\day| primitives, with the latter two zero-padded to
% two digits apiece.
%    \begin{macrocode}
  \xdef#1{\the\year}%
  \ifnum\month<10
    \xdef#1{#1-0\the\month}%
  \else
    \xdef#1{#1-\the\month}%
  \fi
  \ifnum\day<10
    \xdef#1{#1-0\the\day}%
  \else
    \xdef#1{#1-\the\day}%
  \fi
%    \end{macrocode}
% \tex\ does not provide the time in terms of separate hours and minutes
% but rather as the total number of minutes since midnight (|\time|).
% There's no mechanism in \tex\ to query the number of seconds since
% midnight or the timezone so we omit those fields when defining
% macro~|#1|.
%    \begin{macrocode}
  \@tempcnta=\time
  \divide\@tempcnta by 60
  \ifnum\@tempcnta<10
    \xdef#1{#1T0\the\@tempcnta}%
  \else
    \xdef#1{#1T\the\@tempcnta}%
  \fi
  \multiply\@tempcnta by -60
  \advance\@tempcnta by \time
  \ifnum\@tempcnta<10
    \xdef#1{#1:0\the\@tempcnta}%
  \else
    \xdef#1{#1:\the\@tempcnta}%
  \fi
  \xdef#1{#1Z}%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@try@today}
% If |\hyxmp@today@xmp| is still empty and |#1| is defined, evaluate |#2|.
% Otherwise, do nothing.
%    \begin{macrocode}
\def\hyxmp@try@today#1#2{%
  \@ifmtargexp{\hyxmp@today@xmp}{%
    \@ifundefined{#1}{}{#2}%
  }{}%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@today@xmp}
% Define |\hyxmp@today@xmp| as the current date and (if available) time and
% timezone in \acro{XMP} \xmpterm{Date} format~\cite{Adobe2012:XMP}.
% \changes{v2.4}{2013/12/24}{Modified the code to parse the time and
%   timezone from \texttt{\string\string\string\pdfcreationdate}, as
%   proposed by Florian Breitwieser}
% \changes{v5.0}{2020/03/15}{Support \string\XeTeX's \string\cs{filemoddate}}
%    \begin{macrocode}
\def\hyxmp@today@xmp{}
%    \end{macrocode}
% Case 1: |\pdfcreationdate| is defined (\pdfLaTeX\ and pre-0.85 \LuaLaTeX).
%    \begin{macrocode}
\hyxmp@try@today{pdfcreationdate}{%
  \edef\hyxmp@today@xmp{\expandafter\hyxmp@pdf@to@xmp@date\pdfcreationdate}%
}
%    \end{macrocode}
% Case 2: |\pdffeedback| is defined (\LuaLaTeX~0.85+).
%    \begin{macrocode}
\hyxmp@try@today{pdffeedback}{%
  \edef\hyxmp@today@xmp{\expandafter\hyxmp@pdf@to@xmp@date\pdffeedback creationdate}%
}
%    \end{macrocode}
% \begin{macro}{\hyxmp@timestamp}
% Case 3: |\filemoddate| is defined (\XeLaTeX).
% In this case, we treat the timestamp of the job's |.log| file as the
% current date/time.
% \changes{v5.1}{2020/04/08}{Don't rely on
%   \string\cs{jobname}\string\texttt{.aux} existing to query the
%   current time under \string\XeLaTeX\string\@.  Instead, use
%   \string\cs{jobname}\string\texttt{.log}.  Thanks to Ulrike Fischer
%   for the bug report and for her suggestion to use the log file.}
%    \begin{macrocode}
\hyxmp@try@today{filemoddate}{%
  \edef\hyxmp@today@xmp{\filemoddate{\jobname.log}}%
  \edef\next{%
    \edef\noexpand\hyxmp@today@xmp{\noexpand\hyxmp@as@xmp@date{\hyxmp@today@xmp}}%
  }%
  \next
}%
%    \end{macrocode}
% Case 4: None of the above.
% Do the best we can using the available \tex\ primitives (|\year|,
% |\month|, |\day|, and |\time|.
%    \begin{macrocode}
\hyxmp@try@today{year}{%
  \hyxmp@today@xmp@define\hyxmp@today@xmp
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@today@pdf}
% Define |\hyxmp@today@pdf| as the current date and (if available) time
% and timezone in \acro{PDF} date format~\cite{Adobe2008:PDF}.  To do so
% we simply convert |\hyxmp@today@xmp|, defined above, from \acro{XMP}
% to \acro{PDF} using |\hyxmp@xmp@to@pdf@date|.
% \changes{v5.0}{2020/03/16}{Added this macro}
%    \begin{macrocode}
\expandafter\edef\expandafter\hyxmp@today@pdf\expandafter{%
  \expandafter\hyxmp@xmp@to@pdf@date\expandafter{\hyxmp@today@xmp}%
}
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{Trimming leading and trailing spaces}
% \label{sec:trim-spaces}
%
% To make it easier for \acro{XMP} processors to manipulate our output we
% define a |\hyxmp@trimspaces| macro to strip leading and trailing
% spaces from various data fields.
%
% \begin{macro}{\hyxmp@trimspaces}
% Redefine a macro as its previous value but without leading or trailing
% spaces.  This code---as well as that for its helper macros,
% |\hyxmp@trimb| and |\hyxmp@trimc|---was taken almost verbatim from a
% solution to an \emph{Around the Bend} puzzle~\cite{Downes1994:ATB15}.
% Inline comments are also taken from the solution text.
%    \begin{macrocode}
\catcode`\Q=3
%    \end{macrocode}
% |\hyxmp@trimspaces\x| redefines |\x| to have the same replacement text
% sans leading and trailing space tokens.
%    \begin{macrocode}
\newcommand{\hyxmp@trimspaces}[1]{%
%    \end{macrocode}
% Use grouping to emulate a multi-token |afterassignment| queue.
%    \begin{macrocode}
  \begingroup
%    \end{macrocode}
% Put ``|\toks 0 {|'' into the |afterassignment| queue.
%    \begin{macrocode}
  \aftergroup\toks\aftergroup0\aftergroup{%
%    \end{macrocode}
% Apply |\hyxmp@trimb| to the replacement text of |#1|, adding a leading
% |\noexpand| to prevent brace stripping and to serve another purpose
% later.
%    \begin{macrocode}
  \expandafter\hyxmp@trimb\expandafter\noexpand#1Q Q}%
%    \end{macrocode}
% Transfer the trimmed text back into |#1|.
%    \begin{macrocode}
  \edef#1{\the\toks0}%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@trimb}
% |\hyxmp@trimb| removes a trailing space if present, then calls
% |\hyxmp@trimc| to clean up any leftover bizarre |Q|s, and trim a
% leading space. In order for |\hyxmp@trimc| to work properly we need to
% put back a |Q| first.
%    \begin{macrocode}
\def\hyxmp@trimb#1 Q{\hyxmp@trimc#1Q}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@trimc}
% Execute |\vfuzz| assignment to remove leading space; the |\noexpand|
% will now prevent unwanted expansion of a macro or other expandable
% token at the beginning of the trimmed text.  The |\endgroup| will feed
% in the |\aftergroup| tokens after the |\vfuzz| assignment is
% completed.
%    \begin{macrocode}
\def\hyxmp@trimc#1Q#2{\afterassignment\endgroup \vfuzz\the\vfuzz#1}
\catcode`\Q=11
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{Converting text to XML}
% \label{sec:text-xml}
%
% The ``|<|'', ``|>|'', and ``|&|'' characters are significant to \acro{XML}.
% We therefore need to escape them in any author-supplied text.
%
% \begin{macro}{\ifhyxmp@unicodetex}
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
% \begin{macro}{\hyxmp@unicodetextrue}
% \begin{macro}{\hyxmp@unicodetexfalse}
% \XeTeX\ and \LuaTeX\ natively support \term{Unicode}.  We define the
% conditional |\ifhyxmp@unicodetex| to check for these so we can
% properly handle encoding conversions.  The trick here is that
% \term{Unicode} \tex\ implementations compare decimal~64 to
% hexadecimal~40 (decimal~64), specified with four carets, and take the
% \textsc{true} branch; non-\term{Unicode} \tex\ implementations compare
% decimal~64 to character~``|^|'' (decimal~94), ignore the ``|^^0040|''
% and the rest of the \textsc{true} branch, and take the \textsc{false}
% branch.
%   \begin{macrocode}
\newif\ifhyxmp@unicodetex
\ifnum64=`\^^^^0040\relax
  \hyxmp@unicodetextrue
\else
  \hyxmp@unicodetexfalse
\fi
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\SE->pdfdoc@03}
% Preserve \acro{ETX} (|^^C|), which is normally an invalid character in
% \term{PDFDocEncoding}.  We use it in \pkgname{hyperxmp} (and
% specifically in |\hyxmp@xmlify| below) as a list-element separator.
%    \begin{macrocode}
\expandafter\def\csname SE->pdfdoc@03\endcsname{0003}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\SE->pdfdoc@15}
% Preserve \acro{NAK} (|^^U|), which is normally an invalid character in
% \term{PDFDocEncoding}.  We use it in \pkgname{hyperxmp} (and
% specifically in |\hyxmp@xmlify| below) as a placeholder for an
% underscore character.
%    \begin{macrocode}
\expandafter\def\csname SE->pdfdoc@15\endcsname{0015}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@xmlify}
% \changes{v2.0}{2012/08/02}{Completely rewritten by Heiko Oberdiek to
%   better support Unicode-enabled \TeX\ programs}
% \begin{macro}{\hyxmp@xmlified}
% \begin{macro}{\hyxmp@text}
% Given a piece of text defined using |\pdfstringdef| (i.e.,~with many
% special characters redefined to have category code~11), set
% |\hyxmp@xmlified| to the same text but with all occurrences of~``|<|''
% replaced with~|&lt;|, all occurrences of~``|>|'' replaced with~|&gt;|,
% and all occurrences of~``|&|'' replaced with~|&amp;|.
%    \begin{macrocode}
\newcommand*{\hyxmp@xmlify}[1]{%
  \gdef\hyxmp@xmlified{}%
%    \end{macrocode}
% Escaped \acro{PDF} string~$\rightarrow$ \term{PDFDocEncoding}/\term{Unicode}
%    \begin{macrocode}
  \EdefUnescapeString\hyxmp@text{#1}%
  \ifhyxmp@unicodetex
%    \end{macrocode}
% \term{PDFDocEncoding}/\term{Unicode}~$\rightarrow$ \acro{UTF-32BE}
%    \begin{macrocode}
    \hyxmp@is@unicode\hyxmp@text{%
      \StringEncodingConvert
      \hyxmp@text\hyxmp@text{utf16be}{utf32be}%
    }{%
      \ifXeTeX
        \hyxmp@xetex@crap
      \else
        \StringEncodingConvert
        \hyxmp@text\hyxmp@text{pdfdoc}{utf32be}%
      \fi
    }%
%    \end{macrocode}
% \acro{UTF-32BE}~$\rightarrow$ \acro{UTF-32BE} as hex string
%    \begin{macrocode}
    \EdefEscapeHex\hyxmp@text{\hyxmp@text}%
%    \end{macrocode}
% \acro{UTF-32BE}~$\rightarrow$ \acro{XML} in \acro{ASCII}
%    \begin{macrocode}
    \edef\hyxmp@text{%
      \expandafter
    }\expandafter\hyxmp@toxml@unicodetex\hyxmp@text
    \relax\relax\relax\relax\relax\relax\relax\relax
  \else
%    \end{macrocode}
% \term{PDFDocEncoding}/\term{Unicode}~$\rightarrow$ \acro{UTF-8}
%    \begin{macrocode}
    \hyxmp@is@unicode\hyxmp@text{%
      \StringEncodingConvert
      \hyxmp@text\hyxmp@text{utf16be}{utf8}%
    }{%
      \StringEncodingConvert
      \hyxmp@text\hyxmp@text{pdfdoc}{utf8}%
    }%
%    \end{macrocode}
% \acro{UTF-8}~$\rightarrow$ \acro{UTF-8} as hex string
%    \begin{macrocode}
    \EdefEscapeHex\hyxmp@text{\hyxmp@text}%
%    \end{macrocode}
% \acro{UTF-8} as hex string~$\rightarrow$ \acro{XML} in \acro{UTF-8}
% as hex string
%    \begin{macrocode}
    \edef\hyxmp@text{%
      \expandafter\hyxmp@toxml\hyxmp@text\@empty\@empty
    }%
%    \end{macrocode}
% \acro{XML} in \acro{UTF-8} as hex string~$\rightarrow$ \acro{XML}
% in \acro{UTF-8}
%    \begin{macrocode}
    \EdefUnescapeHex\hyxmp@text{\hyxmp@text}%
  \fi
  \global\let\hyxmp@xmlified\hyxmp@text
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@is@unicode}
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
% \begin{macro}{\hyxmp@@is@unicode}
% Given a string and two expressions, evaluate the first expression if
% the string is \acro{UTF-16BE}-encoded and the second expression if not.
%    \begin{macrocode}
\begingroup
  \lccode`\<=254 %
  \lccode`\>=255 %
  \catcode254=12 %
  \catcode255=12 %
\lowercase{\endgroup
  \def\hyxmp@is@unicode#1{%
    \expandafter\hyxmp@@is@unicode#1<>\@nil
  }%
  \def\hyxmp@@is@unicode#1<>#2\@nil{%
    \ifx\\#1\\%
      \expandafter\@firstoftwo
    \else
      \expandafter\@secondoftwo
    \fi
  }%
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@toxml}
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
% Replace the characters ``\textless'', ``\&'', and ``\textgreater'' with
% \acro{XML} entities when using a non-native-\term{Unicode}
% \tex\ (\tex\ or \pdfTeX).
%    \begin{macrocode}
\def\hyxmp@toxml#1#2{%
  \ifx#1\@empty
  \else
    \ifnum"#1#2=`\& %
      26616D703B% &amp;
    \else\ifnum"#1#2=`\< %
      266C743B% &lt;
    \else\ifnum"#1#2=`\> %
      2667743B% &gt;
    \else
%    \end{macrocode}
% \cmdname{dvips} wraps text when generating most PostScript code but
% preserves line breaks within strings.  Unfortunately, \cmdname{dvips}
% fails to observe the special case in the PostScript specification that
% ``[b]alanced pairs of parentheses in the string require no special
% treatment''~\cite{Adobe1996:postscript}.  Consequently, \acro{XMP}
% data containing parentheses (e.g.,~``\texttt{Copyright (C) 1605 Miguel
%   de Cervantes}'') confuse \cmdname{dvips} into thinking that the
% string has ended after the closing parenthesis and that line breaks
% can subsequently be injected safely into the document at arbitrary
% points for formatting purposes.  This leads to erroneous display by
% \acro{PDF} viewers, which honor line breaks within \acro{XMP} tags.
% The solution is to insert a backslash before all parentheses when in
% \texttt{pdfmark}-generating mode to convince \cmdname{dvips} that the
% entire \acro{XMP} packet must be treated as a single,
% not-to-be-modified string.
% \changes{v2.0}{2012/08/22}{Escaped parentheses written with
%   \texttt{pdfmark}s to prevent \cmdname{dvips} from line-wrapping the
%   \protect\acro{XMP} packet}
%    \begin{macrocode}
      \@ifundefined{pdfmark}{%
        #1#2%
      }{%
      \ifnum"#1#2=`\( %
        5C28% \(
      \else\ifnum"#1#2=`\) %
        5C29% \)
      \else
        #1#2%
      \fi\fi
      }%
    \fi\fi\fi
    \expandafter\hyxmp@toxml
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@toxml@unicodetex}
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
% \begin{macro}{\hyxmp@text}
% Replace the characters ``\textless'', ``\&'', and ``\textgreater'' with
% \acro{XML} entities when using a native-\term{Unicode}
% \tex\ (\XeTeX\ or \LuaTeX).
%    \begin{macrocode}
\def\hyxmp@toxml@unicodetex#1#2#3#4#5#6#7#8{%
  \ifx#1\relax
  \else
    \ifnum"#1#2#3#4#5#6#7#8>127 %
      \uccode`\*="#1#2#3#4#5#6#7#8\relax
      \uppercase{%
        \edef\hyxmp@text{\hyxmp@text *}%
      }%
    \else\ifnum"#7#8=`\< %
      \edef\hyxmp@text{\hyxmp@text &lt;}%
    \else\ifnum"#7#8=`\& %
      \edef\hyxmp@text{\hyxmp@text &amp;}%
    \else\ifnum"#7#8=`\> %
      \edef\hyxmp@text{\hyxmp@text &gt;}%
    \else\ifnum"#7#8=`\ %
      \edef\hyxmp@text{\hyxmp@text\space}%
    \else
      \uccode`\*="#7#8\relax
      \uppercase{%
        \edef\hyxmp@text{\hyxmp@text *}%
      }%
    \fi\fi\fi\fi\fi
    \expandafter\hyxmp@toxml@unicodetex
  \fi
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@skipzeros}
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
% Skip over leading zeroes in the input argument.
%    \begin{macrocode}
\def\hyxmp@skipzeros#1{%
  \ifx#10%
    \expandafter\hyxmp@skipzeros
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\x}
% \begin{macro}{\hyxmp@xetex@crap}
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
% \begin{macro}{\hyxmp@try}
% \begin{macro}{\hyxmp@crap@result}
% \begin{macro}{\hyxmp@text}
% In the case of \XeTeX, the strings defined by |\pdfstringdef| can
% contain big characters.  In this case, the string is treated as
% \term{Unicode}.
%    \begin{macrocode}
\begingroup
\def\x#1{\endgroup
  \def\hyxmp@xetex@crap{%
    \edef\hyxmp@try{%
      \expandafter\hyxmp@SpaceOther\hyxmp@text#1\@nil
    }%
    \let\hyxmp@crap@result=N%
    \expandafter\hyxmp@crap@test\hyxmp@try\relax
    \ifx\hyxmp@crap@result Y%
      \let\hyxmp@text\@empty
      \expandafter\hyxmp@crap@convert\hyxmp@try\relax
    \else
      \StringEncodingConvert\hyxmp@text\hyxmp@text{pdfdoc}{utf32be}%
    \fi
  }%
}
\x{ }
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@SpaceOther}
% Re-encode all spaces in a string with category code~12 (``other'').
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
%    \begin{macrocode}
\begingroup
  \catcode`\~=12 %
  \lccode`\~=`\ %
\lowercase{\endgroup
  \def\hyxmp@SpaceOther#1 #2\@nil{%
    #1%
    \ifx\relax#2\relax
      \expandafter\@gobble
    \else
      ~%
      \expandafter\@firstofone
    \fi
    {\hyxmp@SpaceOther#2\@nil}%
  }%
}
%    \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\hyxmp@crap@test}
% Determine if we need to treat a string as \term{Unicode}.
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
%    \begin{macrocode}
\def\hyxmp@crap@test#1{%
  \ifx#1\relax
  \else
    \ifnum`#1>127 %
      \let\hyxmp@crap@result=Y%
      \expandafter\expandafter\expandafter\hyxmp@skiptorelax
    \else
      \expandafter\expandafter\expandafter\hyxmp@crap@test
    \fi
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@skiptorelax}
% Discard all tokens up to and including the first |\relax|.
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
%    \begin{macrocode}
\def\hyxmp@skiptorelax#1\relax{}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@crap@convert}
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
% \begin{macro}{\hyxmp@num}
% \begin{macro}{\hyxmp@text}
% Convert a hexadecimal string to a number.
%    \begin{macrocode}
\def\hyxmp@crap@convert#1{%
  \ifx#1\relax
  \else
    \edef\hyxmp@num{\number`#1}%
    \ifnum\hyxmp@num>"FFFFFF %
      \lccode`\!=\intcalcDiv{\hyxmp@num}{\number"1000000}\relax
      \lowercase{\edef\hyxmp@text{\hyxmp@text!}}%
      \edef\hyxmp@num{\intcalcMod{\hyxmp@num}{\number"1000000}}%
    \else
      \edef\hyxmp@text{\hyxmp@text\hyxmp@zero}%
    \fi
    \ifnum\hyxmp@num>"FFFF %
      \lccode`\!=\intcalcDiv{\hyxmp@num}{\number"10000}\relax
      \lowercase{\edef\hyxmp@text{\hyxmp@text!}}%
      \edef\hyxmp@num{\intcalcMod{\hyxmp@num}{\number"10000}}%
    \else
      \edef\hyxmp@text{\hyxmp@text\hyxmp@zero}%
    \fi
    \ifnum\hyxmp@num>"FF %
      \lccode`\!=\intcalcDiv{\hyxmp@num}{\number"100}\relax
      \lowercase{\edef\hyxmp@text{\hyxmp@text!}}%
      \edef\hyxmp@num{\intcalcMod{\hyxmp@num}{\number"100}}%
    \else
      \edef\hyxmp@text{\hyxmp@text\hyxmp@zero}%
    \fi
    \ifnum\hyxmp@num>0 %
      \lccode`\!=\hyxmp@num\relax
      \lowercase{\edef\hyxmp@text{\hyxmp@text!}}%
    \else
      \edef\hyxmp@text{\hyxmp@text\hyxmp@zero}%
    \fi
    \expandafter\hyxmp@crap@convert
  \fi
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@zero}
% Define a null character with category code~12 (``other'').
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
%    \begin{macrocode}
\begingroup
  \catcode0=12 %
  \gdef\hyxmp@zero{^^00}%
\endgroup
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{Outputting structured XML}
% \label{sec:output-xml}
%
% An \acro{XMP} packet consists of structured \acro{XML} data.  We
% define some helper routines to handle the repetitive tasks of
% indenting a consistent number of spaces, inserting begin and end tags,
% and escaping arbitrary text as necessary for \acro{XML} compatibility.
%
% \begin{macro}{\hyxmp@extra@indent}
% This macro is used internally to increase the amount of indentation
% when writing certain \acro{XML} data.  It is normally defined as empty
% but can temporarily be redefined to a sequence of |\space| characters.
%    \begin{macrocode}
\newcommand*{\hyxmp@extra@indent}{}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@add@simple}
% Given an \acro{XMP} tag~(|#1|) and a string~(|#2|), if the string is
% nonempty, add a begin tag, the string, and an end tag to the packet.
% The ``|simple|'' in the macro name indicates that the string is output
% without variations for different languages.
% \changes{v2.0}{2012/08/25}{Added this macro}
% \changes{v5.0}{2020/02/21}{Insert the tag name (\string\texttt{\#1})
%   verbatim}
%    \begin{macrocode}
\newcommand*{\hyxmp@add@simple}[2]{%
  \@ifnotmtargexp{#2}{%
    \hyxmp@xmlify{#2}%
    \hyxmp@add@to@xml{\hyxmp@extra@indent______<}%
    \xdef\hyxmp@xml{\hyxmp@xml#1}%
    \hyxmp@add@to@xml{>\hyxmp@xmlified</}%
    \xdef\hyxmp@xml{\hyxmp@xml#1>^^J}%
  }%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@add@simple@var}
% Given an \acro{XMP} tag~(|#1|) and a variable name~(|#2|), if the
% string is defined, add a begin tag, the string, and an end tag to the
% packet.  The ``|simple|'' in the macro name indicates that the string
% is output without variations for different languages.
% |\hyxmp@add@simple@var| differs from |\hyxmp@add@simple| in that the
% former includes defined but empty values in the \acro{XMP} packet
% while the latter excludes both undefined and defined but empty values.
% \changes{v2.4}{2013/12/21}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@add@simple@var}[2]{%
  \expandafter\ifx\csname#2\endcsname\relax
  \else
    \hyxmp@xmlify{\csname#2\endcsname}%
    \hyxmp@add@to@xml{%
      \hyxmp@extra@indent______<#1>\hyxmp@xmlified</#1>^^J%
    }%
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@add@simple@lang}
% Given an \acro{XMP} tag~(|#1|) and a string~(|#2|), if the string is
% nonempty, add a begin tag, the string, and an end tag to the packet.
% The ``|simple|'' in the macro name indicates that the string is output
% without variations for different languages.  However, if the string
% begins with a language code in square brackets, specify that as the
% (sole) language for the tag.
% \changes{v4.0}{2019/03/12}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@add@simple@lang}[2]{%
  \@ifnotmtarg{#2}{%
    \hyxmp@xmlify{#2}%
    \expandafter\hyxmp@add@simple@lang@i\hyxmp@xmlified\relax{#1}%
  }%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@add@simple@lang@i}
% This is a helper macro for |\hyxmp@add@simple@lang|.  It takes an
% optional language code (in brackets), text up to |\relax|, and a tag,
% and typesets the text within the \acro{XML} tag.
%    \begin{macrocode}
\newcommand*{\hyxmp@add@simple@lang@i}{%
  \@ifnextchar[\hyxmp@add@simple@lang@ii{\hyxmp@add@simple@lang@ii[]}%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@add@simple@lang@ii}
% This is another helper macro for |\hyxmp@add@simple@lang|.  It takes
% an mandatory language code (in brackets; can be empty), text up to
% |\relax|, and a tag, and typesets the text within the \acro{XML} tag.
%    \begin{macrocode}
\def\hyxmp@add@simple@lang@ii[#1]#2\relax#3{%
  \@ifnotmtarg{#2}{%
    \hyxmp@xmlify{#2}%
    \@ifmtarg{#1}{%
      \hyxmp@add@to@xml{%
______<#3>\hyxmp@xmlified</#3>^^J%
      }%
    }{%
      \hyxmp@add@to@xml{%
______<#3 xml:lang="#1">\hyxmp@xmlified</#3>^^J%
      }%
    }%
  }%
}
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{Providing metadata in multiple languages}
% \label{sec:lang-alt}
%
% Certain \acro{XMP} tags---\xmpprop{dc:title},
% \xmpprop{dc:description}, and \xmpprop{dc:rights} (and others?  Let me
% know.)---can be expressed in multiple languages.  The same text is
% used for both language \optname{pdfmetalang} (default:
% \optname{pdflang}) and language ``|x-default|''.  To express the same
% metadata in multiple languages, we provide an |\XMPLangAlt| macro to
% construct a list of alternative forms for a piece of metadata.
%
% \begin{macro}{\hyxmp@alt@title}
% \begin{macro}{\hyxmp@alt@description}
% \begin{macro}{\hyxmp@alt@rights}
% Each of these macros is a list in which each element is of the form
% ``|\do| \meta{language} \meta{text}'' in which \meta{language} is an
% \acro{ISO} \mbox{639-1} two-letter country code with an optional
% \acro{ISO} \mbox{3166-1} two-letter region code.  For example,
% |\hyxmp@alt@title| may contain an element, ``|\do| |{es-MX}|
% |{Este| |es| |mi| |documento}|''.
%    \begin{macrocode}
\def\hyxmp@alt@title{}
\def\hyxmp@alt@description{}
\def\hyxmp@alt@rights{}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@LA@accept}
% This macro wraps |\define@key| to make the option ``|#1|=\meta{value}''
% append \meta{value} to list~|#2|.
%    \begin{macrocode}
\newcommand{\hyxmp@LA@accept}[2]{%
  \define@key{hyxmp@LA}{#1}{%
%    \end{macrocode}
% \begin{macro}{\hyxmp@value}
% As Niklas Beisert observed, if the option passed to the current key
% contains \LaTeX\ code, this code will be included in the \acro{XMP}
% packet, which is undesirable.  Hence, we first clean up the string
% using |\hyxmp@pdfstringdef|.
%    \begin{macrocode}
    \hyxmp@pdfstringdef\hyxmp@value{##1}%
    \xdef#2{#2\noexpand\do {\hyxmp@cur@lang} {\hyxmp@value}}%
  }
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% Define \meta{key}=\meta{value} options for appending to each of the
% |\hyxmp@alt|\meta{tag} lists.
%    \begin{macrocode}
\hyxmp@LA@accept{pdftitle}{\hyxmp@alt@title}
\hyxmp@LA@accept{pdfsubject}{\hyxmp@alt@description}
\hyxmp@LA@accept{pdfcopyright}{\hyxmp@alt@rights}
%    \end{macrocode}
%
% \begin{macro}{\XMPLangAlt}
% Argument~|#1| is a language expressed as a two-letter country code and
% optional two-letter region code.  Argument~|#2| is a list of
% \meta{key}=\meta{value} pairs.  Keys correspond to |\hypersetup|
% options such as ``|pdftitle|'', ``|pdfsubject|'', and
% ``|pdfcopyright|''.  Values are the alternative-language form of the
% text provided for the corresponding option.
% \changes{v3.3}{2017/07/22}{Added this macro based on a request---and
%   some code---by Niklas Beisert to support metadata expressed in multiple
%   languages}
%    \begin{macrocode}
\newcommand{\XMPLangAlt}[2]{%
  \let\do=\relax
%    \end{macrocode}
% \begin{macro}{\hyxmp@cur@lang}
% Store the provided language, which will be used during option processing.
%    \begin{macrocode}
  \edef\hyxmp@cur@lang{#1}%
  \setkeys{hyxmp@LA}{#2}%
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
%
% \subsection{UUID generation}
% \label{sec:uuid-gen}
%
% We use a linear congruential generator to produce pseudorandom
% version~4 \acro{UUID}s~\cite{Leach2005:uuid}.  True, this method has
% its flaws but it's simple to implement in \tex\ and is good enough for
% producing the \acro{XMP} \xmpprop{xmpMM:DocumentID} and
% \xmpprop{xmpMM:InstanceID} fields.
%
% \begin{macro}{\hyxmp@modulo@a}
% Replace the contents of |\@tempcnta| with the contents modulo~|#1|.
% Note that |\@tempcntb| is overwritten in the process.
%    \begin{macrocode}
\def\hyxmp@modulo@a#1{%
  \@tempcntb=\@tempcnta
  \divide\@tempcntb by #1
  \multiply\@tempcntb by #1
  \advance\@tempcnta by -\@tempcntb
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@big@prime}
% \begin{macro}{\hyxmp@big@prime@ii}
% Define a couple of large prime numbers that can still be stored in a
% \tex\ counter.
%    \begin{macrocode}
\def\hyxmp@big@prime{536870923}
\def\hyxmp@big@prime@ii{536870027}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@seed@rng}
% \begin{macro}{\hyxmp@one@token}
% Seed \pkgname{hyperxmp}'s random-number generator from a given piece
% of text.
%    \begin{macrocode}
\def\hyxmp@seed@rng#1{%
  \@tempcnta=\hyxmp@big@prime
  \futurelet\hyxmp@one@token\hyxmp@seed@rng@i#1\@empty
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@seed@rng@i}
% \begin{macro}{\hyxmp@one@token}
% \begin{macro}{\next}
% Do all of the work for |\hyxmp@seed@rng|.  For each character code $c$
% of the input text, assign $\mathtt{\string\@tempcnta} \leftarrow 3
% \cdot \mathtt{\string\@tempcnta} + c
% \pmod{\mathtt{\string\hyxmp@big@prime}}$.
%    \begin{macrocode}
\def\hyxmp@seed@rng@i{%
  \ifx\hyxmp@one@token\@empty
    \let\next=\relax
  \else
    \def\next##1{%
      \multiply\@tempcnta by 3
      \advance\@tempcnta by `##1
      \hyxmp@modulo@a{\hyxmp@big@prime}%
      \futurelet\hyxmp@one@token\hyxmp@seed@rng@i
    }%
  \fi
  \next
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@set@rand@num}
% \begin{macro}{\hyxmp@rand@num}
% Advance |\hyxmp@rand@num| to the next pseudorandom number in the
% sequence.  Specifically, we assign $\mathtt{\string\hyxmp@rand@num}
% \leftarrow 3 \cdot \mathtt{\string\hyxmp@rand@num} +
% \mathtt{\string\hyxmp@big@prime@ii}
% \pmod{\mathtt{\string\hyxmp@big@prime}}$.  Note that both |\@tempcnta|
% and |\@tempcntb| are overwritten in the process.
%    \begin{macrocode}
\def\hyxmp@set@rand@num{%
  \@tempcnta=\hyxmp@rand@num
  \multiply\@tempcnta by 3
  \advance\@tempcnta by \hyxmp@big@prime@ii
  \hyxmp@modulo@a{\hyxmp@big@prime}%
  \xdef\hyxmp@rand@num{\the\@tempcnta}%
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@append@hex}
% Append a randomly selected hexadecimal digit to macro~|#1|.  Note that
% both |\@tempcnta| and |\@tempcntb| are overwritten in the process.
%    \begin{macrocode}
\def\hyxmp@append@hex#1{%
  \hyxmp@set@rand@num
  \@tempcnta=\hyxmp@rand@num
  \hyxmp@modulo@a{16}%
  \ifnum\@tempcnta<10
    \xdef#1{#1\the\@tempcnta}%
  \else
%    \end{macrocode}
% There \emph{must} be a better way to handle the numbers~10--15 than
% with |\ifcase|.
%    \begin{macrocode}
    \advance\@tempcnta by -10
    \ifcase\@tempcnta
      \xdef#1{#1a}%
      \or\xdef#1{#1b}%
      \or\xdef#1{#1c}%
      \or\xdef#1{#1d}%
      \or\xdef#1{#1e}%
      \or\xdef#1{#1f}%
    \fi
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@append@hex@iii}
% Invoke |\hyxmp@append@hex| three times.
%    \begin{macrocode}
\def\hyxmp@append@hex@iii#1{%
  \hyxmp@append@hex#1%
  \hyxmp@append@hex#1%
  \hyxmp@append@hex#1%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@append@hex@iv}
% Invoke |\hyxmp@append@hex| four times.
%    \begin{macrocode}
\def\hyxmp@append@hex@iv#1{%
  \hyxmp@append@hex@iii#1%
  \hyxmp@append@hex#1%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@create@uuid}
% As per the definition of a version~4
% \acro{UUID}~\cite{Leach2005:uuid}, define macro~|#1| as a \acro{UUID}
% of the form
% ``|uuid:|\textit{xxxxxxxx}|-|\linebreak[0]\textit{xxxx}|-|\linebreak[0]\textit{4xxx}|-|\linebreak[0]\textit{yxxx}|-|\linebreak[0]\textit{xxxxxxxxxxxx}''
% in which each ``\textit{x}'' is a lowercase hexadecimal digit and
% ``\textit{y}'' is one of ``|8|'', ``|9|'', ``|a|'', or~``|b|''.  We
% assume that the random-number generator is already seeded.  Note that
% |\hyxmp@create@uuid| overwrites both |\@tempcnta| and |\@tempcntb|.
% \changes{v2.4}{2014/01/02}{Modified this macro to produce a proper
%   version~4 (random or pseudorandom) \protect\acro{UUID}}
%    \begin{macrocode}
\def\hyxmp@create@uuid#1{%
  \def#1{uuid:}%
  \hyxmp@append@hex@iv#1%
  \hyxmp@append@hex@iv#1%
  \g@addto@macro#1{-}%
  \hyxmp@append@hex@iv#1%
  \g@addto@macro#1{-4}%
  \hyxmp@append@hex@iii#1%
  \g@addto@macro#1{-}%
%    \end{macrocode}
% Randomly select one of ``|8|'', ``|9|'', ``|a|'', or~``|b|''.
%    \begin{macrocode}
  \hyxmp@set@rand@num
  \@tempcnta=\hyxmp@rand@num
  \hyxmp@modulo@a{4}%
  \ifcase\@tempcnta
    \g@addto@macro#1{8}%
    \or\g@addto@macro#1{9}%
    \or\g@addto@macro#1{a}%
    \or\g@addto@macro#1{b}%
  \fi
  \hyxmp@append@hex@iii#1%
  \g@addto@macro#1{-}%
  \hyxmp@append@hex@iv#1%
  \hyxmp@append@hex@iv#1%
  \hyxmp@append@hex@iv#1%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@def@DocumentID}
% \begin{macro}{\hyxmp@DocumentID}
% \begin{macro}{\hyxmp@seed@string}
% Seed the random-number generator with a function of the current
% filename, \acro{PDF} document title, and \acro{PDF} author, then invoke
% |\hyxmp@create@uuid| to define |\hyxmp@DocumentID| as a random \acro{UUID}.
% \changes{v3.4}{2017/11/04}{Correctly handle an author field of all spaces.
%   Bug reported by Ga\"etan Leurent}
%    \begin{macrocode}
\newcommand*{\hyxmp@def@DocumentID}{%
  \edef\hyxmp@seed@string{\jobname:\@pdftitle:\@pdfauthor:}%
  \expandafter\hyxmp@seed@rng\expandafter{\hyxmp@seed@string}%
  \edef\hyxmp@rand@num{\the\@tempcnta}%
  \hyxmp@create@uuid\hyxmp@DocumentID
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@def@InstanceID}
% \begin{macro}{\hyxmp@InstanceID}
% \begin{macro}{\hyxmp@seed@string}
% Seed the random-number generator with a function of the current
% filename, \acro{PDF} document title, \acro{PDF} author, and the
% current timestamp, then invoke |\hyxmp@create@uuid| to define
% |\hyxmp@InstanceID| as a random \acro{UUID}.  For the current
% timestamp, we use both the document-specified timestamp from
% \optname{pdfdate} and the \tex\ time.  The former can be more precise
% (to sub-seconds) but may be less random (as it depends on manual
% document modifications) while the latter is typically less precise (to
% minutes) but may be more random (as it is updated automatically).
% \changes{v3.5}{2018/11/27}{Seed with the \protect\TeX\ timestamp in
%   addition to the document-specified timestamp}
%    \begin{macrocode}
\newcommand*{\hyxmp@def@InstanceID}{%
  \hyxmp@today@xmp@define{\hyxmp@seed@string}%
  \edef\hyxmp@seed@string{%
    \jobname:\@pdftitle:\@pdfauthor:\hyxmp@today@xmp:\hyxmp@seed@string
  }%
  \expandafter\hyxmp@seed@rng\expandafter{\hyxmp@seed@string}%
  \edef\hyxmp@rand@num{\the\@tempcnta}%
  \hyxmp@create@uuid\hyxmp@InstanceID
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
%
% \subsection{Constructing the XMP packet}
%
% An \acro{XMP} packet ``shall consist of the following, in order: a
% header \acro{PI}, the serialized \acro{XMP} data model (the \acro{XMP}
% packet) with optional white-space padding, and a trailer
% \acro{PI}''~\cite{Adobe2012:XMP}.  (``\acro{PI}'' is an abbreviation
% for ``processing instructions'').  The serialized \acro{XMP} includes
% blocks of \acro{XML} for various \acro{XMP} schemata: Adobe \acro{PDF}
% (Section~\ref{sec:adobe-pdf}), Dublin Core
% (Section~\ref{sec:dublin-core}), \acro{XMP} Rights Management
% (Section~\ref{sec:xmp-rights}), \acro{XMP} Media Management
% (Section~\ref{sec:xmp-media}), \acro{XMP} Basic
% (Section~\ref{sec:xmp-basic}), Photoshop
% (Section~\ref{sec:photoshop}), \acro{IPTC} Photo Metadata
% (Section~\ref{sec:photo-meta}), and \acro{PDF}\textsc{/*} Identification
% (Section~\ref{sec:pdfX-id}).  The |\hyxmp@construct@packet| macro
% (Section~\ref{sec:combining-schemata}) constructs the \acro{XMP}
% packet into |\hyxmp@xml|.  It first writes the appropriate \acro{XML}
% header, then calls the various schema-writing macros, then injects
% |\hyxmp@padding| as padding, and finally writes the appropriate
% \acro{XML} trailer.
%
% \subsubsection{XMP utility functions}
%
% \begin{macro}{\hyxmp@add@to@xml}
% Given a piece of text, replace all underscores with category-code~11
% (``other'') spaces and all |^C| characters with commas, then append
% the result to the |\hyxmp@xml| macro.
% \changes{v2.0}{2012/08/24}{Updated also to replace commas}
% \changes{v2.5}{2014/06/19}{Updated also to replace underscores and to
%   modify only the text being added, not the already-modified text}
% \changes{v2.8}{2014/04/05}{Corrected inadvertent lowercasing of non-Latin
%   characters when run under \XeLaTeX\ or \LuaLaTeX\ (bug reported by
%   Leonid Sinev)}
%    \begin{macrocode}
\newcommand*{\hyxmp@add@to@xml}[1]{%
  \bgroup
    \@tempcnta=0
    \ifhyxmp@unicodetex
      \@tempcntb=65536%
    \else
      \@tempcntb=256%
    \fi
    \loop
      \lccode\@tempcnta=\@tempcnta
      \advance\@tempcnta by 1
      \ifnum\@tempcnta<\@tempcntb
    \repeat
    \lccode`\_=`\ \relax
    \lccode`\^^C=`\,\relax
    \lccode`\^^U=`\_\relax
    \lowercase{\xdef\hyxmp@new@xml{#1}}%
    \xdef\hyxmp@xml{\hyxmp@xml\hyxmp@new@xml}%
  \egroup
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@hash}
% Define a category-code~11 (``other'') version of the ``|#|'' character.
%    \begin{macrocode}
\bgroup
\catcode`\#=11
\gdef\hyxmp@hash{#}
\egroup
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@padding}
% \begin{macro}{\hyxmp@xml}
% The \acro{XMP} specification recommends leaving approximately
% 2000~bytes of whitespace at the end of each \acro{XMP} packet to
% facilitate editing the packet in place~\cite{Adobe2012:XMP}.
% |\hyxmp@padding| is defined to contain 32~lines of 63~spaces and a
% newline apiece for a total of 2048 characters of whitespace.
%    \begin{macrocode}
\bgroup
  \xdef\hyxmp@xml{}%
  \hyxmp@add@to@xml{%
_______________________________________________________________^^J%
  }
  \xdef\hyxmp@padding{\hyxmp@xml}%
\egroup
\xdef\hyxmp@padding{\hyxmp@padding\hyxmp@padding}
\xdef\hyxmp@padding{\hyxmp@padding\hyxmp@padding}
\xdef\hyxmp@padding{\hyxmp@padding\hyxmp@padding}
\xdef\hyxmp@padding{\hyxmp@padding\hyxmp@padding}
\xdef\hyxmp@padding{\hyxmp@padding\hyxmp@padding}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@x@default}
% Define an |x-default| string that we can use in comparisons with
% |\@pdfmetalang|.
%    \begin{macrocode}
\newcommand*{\hyxmp@x@default}{x-default}
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{The Adobe PDF schema}
% \label{sec:adobe-pdf}
%
% Older versions of \pkgname{hyperref} defined a default producer; newer
% versions do not.  Instead, they let the \tex\ engine define the
% producer itself.  This poses a problem for \acro{PDF/A} compliance
% because \pkgname{hyperxmp} sees an empty producer and therefore omits
% writing a \xmpprop{pdf:Producer} to the \acro{XMP} packet, causing a
% mismatch between the data in the \acro{XMP} packet and the data in the
% \acro{PDF} \pdfterm{Info} dictionary.  To ensure consistency between
% \acro{XMP} and \pdfterm{Info}, we explicitly define our own default
% |\@pdfproducer| here.
%
% \begin{macro}{\@pdfproducer}
% \begin{macro}{\hyxmp@define@pdfproducer}
% Define |\@pdfproducer| using the banner string if available or the
% \tex\ engine's version number if not.
% \changes{v5.0}{2020/03/01}{Added this macro}
% \changes{v5.1}{2020/04/06}{Check for \string\LuaTeX\ before checking for
%   \string\pdfTeX\ to work around \string\pkgname{luatex85}'s confusing
%   \string\pkgname{iftex} by defining \string\cs{pdftexversion}.  Thanks
%   to Robin Schwab for the bug report}
%    \begin{macrocode}
\newcommand*{\hyxmp@define@pdfproducer}{%
  \gdef\@pdfproducer{TeX}
  \ifLuaTeX
    \expandafter\hyxmp@banner@to@producer\expandafter{\luatexbanner}%
  \else
    \ifPDFTeX
      \expandafter\hyxmp@banner@to@producer\expandafter{\pdftexbanner}%
    \else
      \ifXeTeX
        \edef\@pdfproducer{XeTeX version \the\XeTeXversion\XeTeXrevision}%
      \fi
    \fi
  \fi
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\@pdfproducer}
% \begin{macro}{\hyxmp@banner@to@producer}
% Define |\@pdfproducer| as the \tex\ engine's banner string
% \ifPDFTeX
% (e.g.,~``\texttt{\pdftexbanner}''),
% \else
%   \ifLuaTeX
%     (e.g.,~``\texttt{\luatexbanner}''),
%   \else
%     (e.g.,~``\texttt{This is pdfTeX, Version 3.14159265-2.6-1.40.20
%     (TeX Live 2019/Debian) kpathsea version 6.3.1}''),
%   \fi
% \fi
% removing the initial ``\texttt{This is}'' if possible (specifically,
% when $\varepsilon$-\TeX's\index{e-TeX=$\varepsilon$-\TeX}
% |\scantokens| primitive is available).
% \changes{v5.1}{2020/04/03}{Prevent the category code of ``@'' from
%   propagating past the \cs{begin}\string\texttt{\{document\}}.
%   Thanks to Robert Schlicht for noticing this catcode ``leak'' and
%   providing a correction}
%    \begin{macrocode}
\def\hyxmp@banner@to@producer#1{%
  \ifx\scantokens\relax
    \gdef\@pdfproducer{#1}%
  \else
    {\scantokens{\makeatletter\hyxmp@remove@this#1\relax}}%
  \fi
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\@pdfproducer}
% \begin{macro}{\hyxmp@remove@this}
% Define |\@pdfproducer| as a given banner string with the initial
% ``\texttt{This is}'' stripped off the beginning.
%    \begin{macrocode}
\def\hyxmp@remove@this This is #1\relax{\gdef\@pdfproducer{#1}}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% If \optname{pdfproducer} wasn't specified and \pkgname{hyperref}
% didn't already define |\@pdfproducer|---old versions of
% \pkgname{hyperref} did; newer ones don't---try to assign a meaningful
% producer string and use that.
% \changes{v5.0}{2020/03/02}{Define a default producer}
%    \begin{macrocode}
\AtBeginDocument{%
  \ifx\@pdfproducer\relax
    \hyxmp@define@pdfproducer
  \fi
}
%    \end{macrocode}
%
% \begin{macro}{\hyxmp@pdf@schema}
% Add properties defined by the Adobe \acro{PDF} schema to the |\hyxmp@xml|
% macro.
%    \begin{macrocode}
\newcommand*{\hyxmp@pdf@schema}{%
%    \end{macrocode}
% Add a block of \acro{XML} to |\hyxmp@xml| that lists the document's
% keywords (the \xmpprop{pdf:Keywords} property), the tools used to
% produce the \acro{PDF} file (the \xmpprop{pdf:Producer} property), and
% the version of the \acro{PDF} standard adhered to (the
% \xmpprop{pdf:PDFVersion} property).  Unlike most of the other schemata
% that \pkgname{hyperxmp} supports, the Adobe \acro{PDF} schema is
% \emph{always} included in the document, even if all of its keys are
% empty.  This is because \PDFstd{A}{1}{b}{} requires the keywords and
% producer to be the same in the \acro{XMP} metadata and the \acro{PDF}
% metadata.  Because \pkgname{hyperref} always specifies the
% \pdfterm{Keywords} and \pdfterm{Producer} fields, even when they're
% empty, \pkgname{hyperxmp} has to follow suit and define
% \xmpprop{pdf:Keywords} and \xmpprop{pdf:Producer} in the \acro{XMP}
% packet.
% \changes{v2.4}{2013/12/21}{Made
%   \texttt{\string\string\string\hyxmp@pdf@schema}
%   \protect\emph{always} include the Adobe \protect\acro{PDF} schema,
%   even when empty.  Florian Breitwieser noted that this is necessary
%   for \protect\PDFstd{A}{1}{b}{} compliance}
% \changes{v5.0}{2020/02/28}{Honor \protect\optname{pdftrapped}}
%    \begin{macrocode}
  \hyxmp@add@simple@var{pdf:Producer}{@pdfproducer}%
  \hyxmp@add@simple@var{pdf:Keywords}{@pdfkeywords}%
  \hyxmp@add@simple{pdf:Trapped}{\@pdftrapped}%
%    \end{macrocode}
% Specify the \acro{PDF} version.
%    \begin{macrocode}
  \@ifundefined{pdfvariable}{%
    \@ifundefined{pdfminorversion}{%
%    \end{macrocode}
% Case 1: Neither |\pdfvariable| nor |\pdfminorversion| is defined
% (\XeLaTeX\ and regular \LaTeX).
%    \begin{macrocode}
    }{%
%    \end{macrocode}
% Case 2: |\pdfminorversion| is defined (\pdfLaTeX\ and pre-0.85 \LuaLaTeX).
%    \begin{macrocode}
      \hyxmp@add@simple{pdf:PDFVersion}{1.\the\pdfminorversion}%
    }%
  }{%
%    \end{macrocode}
% Case 3: |\pdfvariable| is defined (\LuaLaTeX~0.85+).
%    \begin{macrocode}
    \hyxmp@add@simple{pdf:PDFVersion}{1.\the\pdfvariable minorversion}%
  }%
}
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{The Dublin Core schema}
% \label{sec:dublin-core}
%
% \begin{macro}{\hyxmp@rdf@dc}
% Given an optional |\if|\meta{something} statement (|#1|), a Dublin Core
% property~(|#2|) and a macro containing some |\pdfstringdef|-defined
% text~(|#3|), append the appropriate block of \acro{XML} to the |\hyxmp@xml|
% macro.
% \changes{v1.4}{2011/06/12}{Included metadata in the \texttt{x-default}
%   language regardless of the specified metadata language}
% \changes{v3.3}{2017/07/22}{Bug fix: Output the metadata language as
%   correct \noexpand\acro{XML} even when \noexpand\pkgname{hyperref} is
%   loaded with the \noexpand\optname{unicode} option}
%    \begin{macrocode}
\newcommand*{\hyxmp@rdf@dc}[3][\iffalse]{%
%    \end{macrocode}
% Set |\@tempswatrue| only if the given text is nonempty or the provided
% conditional evaluates to \textsc{true}.
%    \begin{macrocode}
  \@ifmtargexp{#3}{\@tempswafalse}{\@tempswatrue}%
  #1
    \@tempswatrue
  \fi
%    \end{macrocode}
% Append the corresponding \acro{XML} only if |\@tempswatrue|.
%    \begin{macrocode}
  \if@tempswa
    \hyxmp@xmlify{#3}%
%    \end{macrocode}
% \begin{macro}{\hyxmp@value}
% Store the \acro{XML}-ified version of |#3| in |\hyxmp@value| so we can
% reuse |\hyxmp@xmlifiied| if necessary.
%    \begin{macrocode}
    \let\hyxmp@value=\hyxmp@xmlified
    \hyxmp@add@to@xml{%
______<dc:#2>^^J%
________<rdf:Alt>^^J%
    }%
    \ifx\@pdfmetalang\hyxmp@x@default
    \else
      \hyxmp@xmlify{\@pdfmetalang}%
      \hyxmp@add@to@xml{%
__________<rdf:li xml:lang="\hyxmp@xmlified">\hyxmp@value</rdf:li>^^J%
      }%
    \fi
    \hyxmp@add@to@xml{%
__________<rdf:li xml:lang="\hyxmp@x@default">\hyxmp@value</rdf:li>^^J%
    }%
%    \end{macrocode}
% Include variants of the text expressed in other languages, as specified by
% the author using |\XMPLangAlt| (Section~\ref{sec:lang-alt}).
%    \begin{macrocode}
    \def\do##1##2{
      \hyxmp@xmlify{##2}%
      \hyxmp@add@to@xml{%
__________<rdf:li xml:lang="##1">\hyxmp@xmlified</rdf:li>^^J%
      }%
    }%
    \csname hyxmp@alt@#2\endcsname
%    \end{macrocode}
% Complete this \acro{XMP} element.
%    \begin{macrocode}
    \hyxmp@add@to@xml{%
________</rdf:Alt>^^J%
______</dc:#2>^^J%
    }%
  \fi
}%
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@list@to@xml}
% Given an optional |\if|\meta{something} statement (|#1|), a Dublin Core
% property~(|#2|), an \acro{RDF} array~(|#3|), and a macro containing a
% comma-separated list~(|#4|), append the appropriate block of \acro{XML} to
% the |\hyxmp@xml| macro.
% \changes{v2.0}{2012/08/02}{Modified by Heiko Oberdiek to use the new
%   \term{Unicode}-processing macros}
%    \begin{macrocode}
\newcommand*{\hyxmp@list@to@xml}[4][\iffalse]{%
%    \end{macrocode}
% Set |\@tempswatrue| only if the given list is nonempty or the provided
% conditional evaluates to \textsc{true}.
%    \begin{macrocode}
  \@ifmtargexp{#4}{\@tempswafalse}{\@tempswatrue}%
  #1
    \@tempswatrue
  \fi
%    \end{macrocode}
% Append the corresponding \acro{XML} only if |\@tempswatrue|.
%    \begin{macrocode}
  \if@tempswa
    \hyxmp@add@to@xml{%
______<dc:#2>^^J%
________<rdf:#3>^^J%
    }%
    \bgroup
%    \end{macrocode}
% \begin{macro}{\@elt}
% Re-encode the text from \term{Unicode} if necessary.  Then redefine
% |\@elt| to \acro{XML}-ify each element of the list and append it to
% |\hyxmp@xmlified|.
%    \begin{macrocode}
      \hyxmp@xmlify{#4}%
      \hyxmp@commas@to@list\hyxmp@list{\hyxmp@xmlified}%
      \def\@elt##1{%
        \hyxmp@add@to@xml{%
__________<rdf:li>##1</rdf:li>^^J%
        }%
      }%
      \hyxmp@list
    \egroup
    \hyxmp@add@to@xml{%
________</rdf:#3>^^J%
______</dc:#2>^^J%
    }%
  \fi
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@singleton@dc}
% Given an optional list type (|Seq| or |Bag|), a Dublin Core property,
% and a string, append a block of \acro{XML} representing a one-element
% list consisting of the given string.
% \changes{v4.1}{2019/04/05}{Added this macro}
%    \begin{macrocode}
\newcommand{\hyxmp@singleton@dc}[3][Bag]{%
  \@ifnotmtarg{#3}{%
    \hyxmp@xmlify{#3}%
    \hyxmp@add@to@xml{%
______<dc:#2>^^J%
________<rdf:#1>^^J%
__________<rdf:li>\hyxmp@xmlified</rdf:li>^^J%
________</rdf:#1>^^J%
______</dc:#2>^^J%
    }%
  }
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@dc@schema}
% Add properties defined by the Dublin Core schema to the |\hyxmp@xml|
% macro.  Specifically, we add entries for the \xmpprop{dc:title}
% property if the author specified a \optname{pdftitle}, the
% \xmpprop{dc:description} property if the author specified a
% \optname{pdfsubject}, the \xmpprop{dc:rights} property if the author
% specified a \optname{pdfcopyright}, the \xmpprop{dc:creator} property
% if the author specified a \optname{pdfauthor}, the
% \xmpprop{dc:subject} property if the author specified
% \optname{pdfkeywords}, and the \xmpprop{dc:language} property if the
% author specified \optname{pdflang}.  We also specify the
% \xmpprop{dc:date} property using the date the document was run through
% \LaTeX\ and the \xmpprop{dc:source} property using the base name of
% the source file with |.tex| appended.
% \changes{v2.0}{2012/08/26}{Added support for \xmpprop{dc:language}
%   and \xmpprop{dc:source}}
% \changes{v2.4}{2013/12/21}{Made \xmpprop{dc:language} a \xmpterm{Bag}
%   instead of an individual item so as to conform to the latest
%   \acro{XMP} specifications, a detail identified by Florian Breitwieser}
%    \begin{macrocode}
\newcommand*{\hyxmp@dc@schema}{%
  \hyxmp@add@simple{dc:format}{application/pdf}%
  \hyxmp@rdf@dc[\ifHy@pdfa]{title}{\@pdftitle}%
  \hyxmp@rdf@dc[\ifHy@pdfa]{description}{\@pdfsubject}%
  \hyxmp@rdf@dc{rights}{\@pdfcopyright}%
  \hyxmp@singleton@dc{publisher}{\@pdfpublisher}%
  \hyxmp@singleton@dc[Seq]{date}{\hyxmp@today@xmp}%
  \hyxmp@singleton@dc{language}{\@pdflang}%
  \hyxmp@singleton@dc{type}{\@pdftype}%
  \hyxmp@list@to@xml[\ifHy@pdfa]{creator}{Seq}{\hyxmp@pdfauthor}%
  \hyxmp@list@to@xml{subject}{Bag}{\hyxmp@pdfkeywords}%
  \ifx\@pdfsource\@empty
  \else
    \hyxmp@add@simple{dc:source}{\@pdfsource}%
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \subsubsection{The XMP Rights Management schema}
% \label{sec:xmp-rights}
%
% \begin{macro}{\hyxmp@xmpRights@schema}
% Add properties defined by the \acro{XMP} Rights Management schema to the
% |\hyxmp@xml| macro.  Currently, these are only the
% \xmpprop{xmpRights:Marked} property and the
% \xmpprop{xmpRights:WebStatement} property.  If the author specified a
% copyright statement we mark the document as copyrighted.  If the
% author specified a license statement we include the \acro{URL} in the
% metadata.
% \changes{v1.4}{2011/05/29}{Renamed the \texttt{xapRights} namespace
%   prefix to \texttt{xmpRights}}
% \changes{v2.0}{2012/08/25}{Modified to include
%   \xmpprop{xmpRights:Marked} only when \optname{pdfcopyright} is
%   specified and \xmpprop{xmpRights:WebStatement} only when
%   \optname{pdflicenseurl} is specified}
%    \begin{macrocode}
\newcommand*{\hyxmp@xmpRights@schema}{%
%    \end{macrocode}
% \begin{macro}{\hyxmp@legal}
% Set |\hyxmp@rights| to |YES| if either \optname{pdfcopyright} or
% \optname{pdflicenseurl} was specified.
%    \begin{macrocode}
  \let\hyxmp@rights=\@empty
  \ifx\@pdflicenseurl\@empty
  \else
    \def\hyxmp@rights{YES}%
  \fi
  \ifx\@pdfcopyright\@empty
  \else
    \def\hyxmp@rights{YES}%
  \fi
%    \end{macrocode}
% Include the license-statement \acro{URL} and/or the copyright
% indication.  The copyright statement itself is included by
% |\hyxmp@dc@schema| in Section~\ref{sec:dublin-core}.
%    \begin{macrocode}
  \ifx\hyxmp@rights\@empty
  \else
    \ifx\@pdfcopyright\@empty
    \else
      \hyxmp@add@simple{xmpRights:Marked}{True}%
    \fi
    \hyxmp@add@simple{xmpRights:WebStatement}{\@pdflicenseurl}%
  \fi
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
%
% \subsubsection{The XMP Media Management schema}
% \label{sec:xmp-media}
%
% \begin{macro}{\hyxmp@mm@schema}
% Add properties defined by the \acro{XMP} Media Management schema to
% the |\hyxmp@xml| macro.  According to the \acro{XMP} specification,
% the \xmpprop{xmpMM:DocumentID} property is supposed to uniquely
% identify a document, and the \xmpprop{xmpMM:InstanceID} property is
% supposed to change with each save operation~\cite{Adobe2012:XMP}.  As
% seen in Section~\ref{sec:uuid-gen}, we do what we can to honor this
% intention from within a \tex-based workflow.  We additionally support
% the \xmpprop{xmpMM:VersionID} property, whose value is supplied by
% the author using \optname{pdfversionid}.
% \changes{v1.4}{2011/05/29}{Renamed the \texttt{xapMM} namespace
%   prefix to \texttt{xmpMM}}
% \changes{v3.5}{2018/11/27}{Generate \protect\cs{hyxmp@DocumentID} and
%   \protect\cs{hyxmp@InstanceID} only if the document does not already
%   define these using the \protect\optname{pdfdocumentid} and
%   \protect\optname{pdfinstanceid} options}
% \changes{v4.0}{2019/03/09}{Include \protect\xmpprop{xmpMM:VersionID} in
%   the \protect\acro{XMP} packet}
%    \begin{macrocode}
\gdef\hyxmp@mm@schema{%
  \@ifmtargexp{\hyxmp@DocumentID}{\hyxmp@def@DocumentID}{}%
  \@ifmtargexp{\hyxmp@InstanceID}{\hyxmp@def@InstanceID}{}%
  \hyxmp@add@simple{xmpMM:DocumentID}{\hyxmp@DocumentID}%
  \hyxmp@add@simple{xmpMM:InstanceID}{\hyxmp@InstanceID}%
  \hyxmp@add@simple{xmpMM:VersionID}{\@pdfversionid}%
  \hyxmp@add@simple{xmpMM:RenditionClass}{\@pdfrendition}%
}
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{The XMP Basic schema}
% \label{sec:xmp-basic}
%
% \begin{macro}{\hyxmp@xmp@basic@schema}
% Add properties defined by the \acro{XMP} Basic schema to the
% |\hyxmp@xml| macro.  These include a bunch of dates (all set to the
% same value) and the base \acro{URL} for the document if specified with
% \optname{baseurl}.
% \changes{v2.0}{2012/08/26}{Added this macro}
% \changes{v3.0}{2016/07/04}{Made the \protect\acro{XMP}
%   \protect\xmpprop{xmp:CreateDate}, \protect\xmpprop{xmp:ModifyDate},
%   and \protect\xmpprop{xmp:MetadataDate} match the \protect\acro{PDF}
%   \protect\pdfterm{CreationDate}}
% \changes{v3.2}{2017/01/22}{Honor \string\pkgname{hyperref}'s
%   \string\optname{pdfcreationdate} and \string\optname{pdfmoddate}
%   options plus a new \string\optname{pdfmetadate} option.  Leonid
%   Sinev requested this additional control and helped test the resulting
%   \protect\pkgname{hyperxmp} code}
%    \begin{macrocode}
\newcommand*{\hyxmp@xmp@basic@schema}{%
%    \end{macrocode}
% For the document's creation date, use the user-specified
% |\@pdfcreationdate| if defined and non-empty.  Otherwise use our
% fabricated |\hyxmp@today@xmp|.
%    \begin{macrocode}
  \@ifmtargexp{\@pdfcreationdate}{%
    \hyxmp@add@simple{xmp:CreateDate}{\hyxmp@today@xmp}%
  }{%
    \hyxmp@add@simple{xmp:CreateDate}{%
      \expandafter\hyxmp@as@xmp@date\expandafter{\@pdfcreationdate}}%
  }%
%    \end{macrocode}
% For the document's modification date, use the user-specified
% |\@pdfmoddate| if defined and non-empty.  Otherwise use our
% fabricated |\hyxmp@today@xmp|.
%    \begin{macrocode}
  \@ifmtargexp{\@pdfmoddate}{%
    \hyxmp@add@simple{xmp:ModifyDate}{\hyxmp@today@xmp}%
  }{%
    \hyxmp@add@simple{xmp:ModifyDate}{%
      \expandafter\hyxmp@as@xmp@date\expandafter{\@pdfmoddate}}%
  }%
%    \end{macrocode}
% For the document's metadata date, use the user-specified
% |\@pdfmetadatetime| if defined and non-empty.  Otherwise use our
% fabricated |\hyxmp@today@xmp|.
%    \begin{macrocode}
  \@ifmtargexp{\@pdfmetadatetime}{%
    \hyxmp@add@simple{xmp:MetadataDate}{\hyxmp@today@xmp}%
  }{%
    \hyxmp@add@simple{xmp:MetadataDate}{\@pdfmetadatetime}%
  }%
%    \end{macrocode}
% Define the creation tool and the base \acro{URL}.
%    \begin{macrocode}
  \hyxmp@add@simple{xmp:CreatorTool}{\@pdfcreator}%
  \hyxmp@add@simple{xmp:BaseURL}{\@baseurl}%
}
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{The Photoshop schema}
% \label{sec:photoshop}
%
% \begin{macro}{\hyxmp@photoshop@schema}
% \changes{v2.0}{2012/08/26}{Simplified using
%   \texttt{\string\string\string\hyxmp@add@simple}}
% \begin{macro}{\hyxmp@photoshop@data}
% Add properties defined by the Photoshop schema to the |\hyxmp@xml|
% macro.  We currently support only the
% \xmpprop{photoshop:AuthorsPosition} and
% \xmpprop{photoshop:CaptionWriter} properties.
%    \begin{macrocode}
\gdef\hyxmp@photoshop@schema{%
  \edef\hyxmp@photoshop@data{\@pdfauthortitle\@pdfcaptionwriter}%
  \hyxmp@add@simple{photoshop:AuthorsPosition}{\@pdfauthortitle}%
  \hyxmp@add@simple{photoshop:CaptionWriter}{\@pdfcaptionwriter}%
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
%
% \subsubsection{PDF/* Identification schemata}
% \label{sec:pdfX-id}
%
% \begin{macro}{\hyxmp@pdfa@id@schema}
% Add properties defined by the \acro{PDF/A} Identification
% schema~\cite{PDFA2008:xmp-props} to the |\hyxmp@xml| macro.  These
% properties identify a document as conforming to a particular
% \acro{PDF/A} standard.  We default to \PDFstd{A}{1}{b}{} if any
% \acro{PDF/A} compliance is detected but let the author override the
% ``1'' with \optname{pdfapart} and the ``b'' with
% \optname{pdfaconformance}.
% \changes{v2.4}{2013/12/21}{Added this macro}
% \changes{v2.9}{2016/04/12}{Let the author specify the \protect\acro{PDF/A}
%   part and conformance IDs, as requested by Leonid Sinev}
%    \begin{macrocode}
\newcommand*{\hyxmp@pdfa@id@schema}{%
  \ifHy@pdfa
    \hyxmp@add@simple{pdfaid:part}{\@pdfapart}%
    \hyxmp@add@simple{pdfaid:conformance}{\@pdfaconformance}%
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@pdfua@id@schema}
% If the document conforms to a \acro{PDF/UA} standard, the author can
% indicate the standard version with \optname{pdfuapart}.
% \changes{v5.0}{2020/02/16}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@pdfua@id@schema}{%
  \hyxmp@add@simple{pdfuaid:part}{\@pdfuapart}%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@pdfx@id@schema}
% \label{page:pdfx-id-schema}
% If the document conforms to a \acro{PDF/X} standard, the author can
% indicate the standard version with \optname{pdfxstandard}.  We
% separately handle \PDFstd{X}{1}{}{}, \PDFstd{X}{2}{}{} and
% \PDFstd{X}{3}{}{}, and \PDFstd{X}{4}{}{} onwards.
% \changes{v5.0}{2020/02/26}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@pdfx@id@schema}{%
  \@tempcnta=0\hyxmp@pdfx@major\relax
  \ifnum\@tempcnta=0
  \else
    \ifnum\@tempcnta=1
      \hyxmp@add@simple{pdfx:GTS_PDFXVersion}{PDF/X-1:2001}%
      \hyxmp@add@simple{pdfx:GTS_PDFXConformance}{\@pdfxstandard}%
    \else
      \ifnum\@tempcnta<4
        \hyxmp@add@simple{pdfx:GTS_PDFXVersion}{\@pdfxstandard}%
      \else
        \hyxmp@add@simple{pdfxid:GTS_PDFXVersion}{\@pdfxstandard}%
      \fi
    \fi
  \fi
}
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{The IPTC Photo Metadata schema}
% \label{sec:photo-meta}
%
% \begin{macro}{\xmplinesep}
% Lines in multiline fields are separated by |\xmplinesep| in the
% generated \acro{XML}.  This defaults to an \acro{LF} (|^^J|) character
% but written as an \acro{XML} character entity for consistency across
% operating systems.
% \changes{v2.2}{2012/12/07}{Added this macro}
%    \begin{macrocode}
\begingroup
  \catcode`\&=12
  \catcode`\#=12
  \gdef\xmplinesep{&#xA;}
\endgroup
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@list@to@lines}
% Given a property~(|#1|) and a macro containing a comma-separated
% list~(|#2|), replace commas with |\xmplinesep|.  Do nothing it the
% list is empty.
% \changes{v2.2}{2012/12/07}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@list@to@lines}[2]{%
  \@ifnotmtargexp{#2}{%
    \bgroup
      \hyxmp@add@to@xml{%
        \hyxmp@extra@indent______<#1>%
      }%
%    \end{macrocode}
% \begin{macro}{\@elt@first}
% The first element of the list is output as is.
%    \begin{macrocode}
      \def\@elt@first##1{%
        \hyxmp@add@to@xml{##1}%
        \let\@elt=\@elt@rest
      }%
%    \end{macrocode}
% \begin{macro}{\@elt@rest}
% The remaining elements of the list are output with a preceding line
% separator (|\xmplinesep|).
%    \begin{macrocode}
      \def\@elt@rest##1{%
        \hyxmp@add@to@xml{\xmplinesep##1}%
      }%
%    \end{macrocode}
% \begin{macro}{\@elt}
% Re-encode the text from \term{Unicode} if necessary.  Then redefine
% |\@elt| to insert a line separator between terms.
%    \begin{macrocode}
      \let\@elt=\@elt@first
      \hyxmp@xmlify{#2}%
      \hyxmp@commas@to@list\hyxmp@list{\hyxmp@xmlified}%
      \hyxmp@list
      \hyxmp@add@to@xml{</#1>^^J}%
    \egroup
  }%
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@iptc@schema}
% Add properties defined by the \acro{IPTC} Photo Metadata
% schema~\cite{IPTC2010:photo-meta} to the |\hyxmp@xml| macro.  We
% currently support only the \xmpprop{Iptc4xmpCore:CreatorContactInfo}
% property, although this is a structure containing multiple fields.
% \changes{v2.2}{2012/12/07}{Added this macro}
% \changes{v2.9}{2016/04/23}{Use \textsf{Iptc4xmpCore} instead of
%   \textsf{Iptc4ContInfo} as the contact-information metadata prefix.
%   Leonid Sinev reports that Acrobat's \acro{PDF/A} validator seems to
%   prefer \textsf{Iptc4xmpCore}}
% \changes{v4.0}{2019/03/09}{Moved the definition of
%   \protect\cs{hyxmp@iptc@data} from here into
%   \protect\cs{hyxmp@check@iptc@data}}
% \changes{v4.0}{2019/03/16}{Renamed this macro to
%   \protect\cs{hyxmp@iptc@schema} from
%   \protect\cs{hyxmp@photometa@schema}}
% \changes{v4.0}{2019/03/16}{Rewrote this macro entirely to correct
%   the use of fields within a structure}
%    \begin{macrocode}
\gdef\hyxmp@iptc@schema{%
%    \end{macrocode}
% Because we currently support only
% \xmpprop{Iptc4xmpCore:CreatorContactInfo} it suffices to check if we
% have any relevant data.  If so, we instantiate a
% \xmpprop{Iptc4xmpCore:ContactInfo} structure with all available
% fields.
%    \begin{macrocode}
  \ifx\hyxmp@iptc@data\@empty
  \else
    \hyxmp@add@to@xml{%
______<Iptc4xmpCore:CreatorContactInfo rdf:parseType="Resource">^^J%
    }%
%    \end{macrocode}
% We locally redefine |\hyxmp@extra@indent| to increase the indentation
% of the assignments to \xmpprop{Iptc4xmpCore:CreatorContactInfo}'s
% fields.
%    \begin{macrocode}
    \bgroup
      \edef\hyxmp@extra@indent{\hyxmp@extra@indent\space\space}%
      \hyxmp@list@to@lines{Iptc4xmpCore:CiAdrExtadr}{\@pdfcontactaddress}%
      \hyxmp@add@simple{Iptc4xmpCore:CiAdrCity}{\@pdfcontactcity}%
      \hyxmp@add@simple{Iptc4xmpCore:CiAdrRegion}{\@pdfcontactregion}%
      \hyxmp@add@simple{Iptc4xmpCore:CiAdrPcode}{\@pdfcontactpostcode}%
      \hyxmp@add@simple{Iptc4xmpCore:CiAdrCtry}{\@pdfcontactcountry}%
%    \end{macrocode}
% \begin{macro}{\xmplinesep}
% The \acro{IPTC} standard states that sets of telephone numbers, email
% addresses, and \acro{URL}s for the contact person or institution,
% ``[m]ay have to be separated by a comma in the user
% interface''~\cite{IPTC2010:photo-meta}.  This is rather ambiguous:
% Does the comma appear \emph{only} in the user interface or also in the
% generated \acro{XML}\@?  Here we assume the latter interpretation and
% temporarily redefine |\xmplinesep| as a comma and use
% |\hyxmp@list@to@lines| to insert the data.  Unlike
% |\hyxmp@add@simple|, this approach trims all spaces surrounding commas.
%    \begin{macrocode}
      \def\xmplinesep{,}%
      \hyxmp@list@to@lines{Iptc4xmpCore:CiTelWork}{\@pdfcontactphone}%
      \hyxmp@list@to@lines{Iptc4xmpCore:CiEmailWork}{\@pdfcontactemail}%
      \hyxmp@list@to@lines{Iptc4xmpCore:CiUrlWork}{\@pdfcontacturl}%
    \egroup
    \hyxmp@add@to@xml{%
______</Iptc4xmpCore:CreatorContactInfo>^^J%
    }%
  \fi
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \subsubsection{The PRISM Basic Metadata schema}
% \label{sec:prism-meta}
%
% \begin{macro}{\hyxmp@prism@schema}
% \changes{v4.0}{2019/03/10}{Added this macro}
% Add properties defined by the \acro{PRISM} Basic Metadata
% schema~\cite{PRISM2012:basic-meta}.
%    \begin{macrocode}
\newcommand*{\hyxmp@prism@schema}{%
  \ifx\hyxmp@prism@data\@empty
  \else
    \hyxmp@add@simple{prism:complianceProfile}{three}%
  \fi
  \hyxmp@add@simple@lang{prism:subtitle}{\@pdfsubtitle}%
  \hyxmp@add@simple@lang{prism:publicationName}{\@pdfpublication}%
  \hyxmp@add@simple{prism:aggregationType}{\@pdfpubtype}%
  \hyxmp@add@simple@lang{prism:bookEdition}{\@pdfbookedition}%
  \hyxmp@add@simple{prism:volume}{\@pdfvolumenum}%
  \hyxmp@add@simple{prism:number}{\@pdfissuenum}%
  \hyxmp@add@simple{prism:pageRange}{\@pdfpagerange}%
  \hyxmp@add@simple{prism:isbn}{\@pdfisbn}%
  \hyxmp@add@simple{prism:issn}{\@pdfissn}%
  \hyxmp@add@simple{prism:eIssn}{\@pdfeissn}%
  \hyxmp@add@simple{prism:doi}{\@pdfdoi}%
  \hyxmp@add@simple{prism:url}{\@pdfurl}%
  \hyxmp@add@simple{prism:byteCount}{\@pdfbytes}%
  \hyxmp@add@simple{prism:pageCount}{\@pdfnumpages}%
}
%    \end{macrocode}
% \end{macro}
%
% \subsubsection{XMP extension schemata}
% \label{sec:extension-schemata}
%
% Not all of the schemata supported by \pkgname{hyperxmp} are predefined
% by \acro{XMP}.  \acro{PDF/A} conversion would normally fail for
% documents that employ ``custom'' schemata.  However, this problem can
% be circumvented by declaring non-standard schemata in the \acro{XMP}
% packet itself, following a technique described in a PDF Association
% technical note~\cite{PDFA2008:ext-schemas}.  In this section, we
% declare only those schemata we actually use.
%
% \begin{macro}{\hyxmp@check@iptc@data}
% Define |\hyxmp@iptc@data| as the concatenation of all \acro{IPTC}
% photo metadata supplied by the document.
%    \begin{macrocode}
\newcommand*{\hyxmp@check@iptc@data}{%
%    \end{macrocode}
% \begin{macro}{\hyxmp@iptc@data}
%    \begin{macrocode}
  \edef\hyxmp@iptc@data{%
    \@pdfcontactaddress
    \@pdfcontactcity
    \@pdfcontactregion
    \@pdfcontactpostcode
    \@pdfcontactcountry
    \@pdfcontactphone
    \@pdfcontactemail
    \@pdfcontacturl
  }%
}%
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@check@prism@data}
% Define |\hyxmp@prism@data| as the concatenation of all \acro{PRISM}
% metadata supplied by the document.
%    \begin{macrocode}
\newcommand*{\hyxmp@check@prism@data}{%
%    \end{macrocode}
% \begin{macro}{\hyxmp@prism@data}
%    \begin{macrocode}
  \edef\hyxmp@prism@data{%
    \@pdfbookedition
    \@pdfbytes
    \@pdfdoi
    \@pdfeissn
    \@pdfisbn
    \@pdfissn
    \@pdfissuenum
    \@pdfnumpages
    \@pdfpagerange
    \@pdfpublication
    \@pdfpubtype
    \@pdfsubtitle
    \@pdfurl
    \@pdfvolumenum
  }%
}%
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\hyxmp@begin@extension@decls}
% Begin a block of \acro{XML} tags that indicates we're declaring one or
% more extension schemata.
%    \begin{macrocode}
\newcommand*{\hyxmp@begin@extension@decls}{%
  \hyxmp@add@to@xml{%
______<pdfaExtension:schemas>^^J%
________<rdf:Bag>^^J%
  }%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@end@extension@decls}
% End the block of \acro{XML} tags begun by |\hyxmp@begin@extension@decls|.
%    \begin{macrocode}
\newcommand*{\hyxmp@end@extension@decls}{%
  \hyxmp@add@to@xml{%
________</rdf:Bag>^^J%
______</pdfaExtension:schemas>^^J%
  }%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@begin@ext@decl}
% Begin the declaration of a single extension schema.
% |\hyxmp@begin@ext@decl| accepts the schema's name, prefix, and
% namespace URI.
% \changes{v4.0}{2019/03/15}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@begin@ext@decl}[3]{%
  \hyxmp@add@to@xml{%
__________<rdf:li rdf:parseType="Resource">^^J%
____________<pdfaSchema:schema>#1</pdfaSchema:schema>^^J%
____________<pdfaSchema:prefix>#2</pdfaSchema:prefix>^^J%
____________<pdfaSchema:namespaceURI>#3</pdfaSchema:namespaceURI>^^J%
____________<pdfaSchema:property>^^J%
______________<rdf:Seq>^^J%
  }%
}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@end@ext@decl}
% End the declaration of a single extension schema.
% \changes{v4.0}{2019/03/15}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@end@ext@decl}{%
  \hyxmp@add@to@xml{%
______________</rdf:Seq>^^J%
____________</pdfaSchema:property>^^J%
__________</rdf:li>^^J%
  }%
}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@declare@property}
% Declare a single extension-schema property.  |\hyxmp@declare@property|
% takes as input an optional type (defaults to \xmpterm{Text}) and a
% mandatory name, category, and description.
% \changes{v4.0}{2019/03/15}{Added this macro}
% \changes{v5.0}{2020/02/21}{Insert the property name (\string\texttt{\#2})
%   verbatim}
%    \begin{macrocode}
\newcommand{\hyxmp@declare@property}[4][Text]{%
  \hyxmp@add@to@xml{%
________________<rdf:li rdf:parseType="Resource">^^J%
__________________<pdfaProperty:name>}%
  \xdef\hyxmp@xml{\hyxmp@xml#2}%
  \hyxmp@add@to@xml{</pdfaProperty:name>^^J%
__________________<pdfaProperty:valueType>#1</pdfaProperty:valueType>^^J%
__________________<pdfaProperty:category>#3</pdfaProperty:category>^^J%
__________________<pdfaProperty:description>#4</pdfaProperty:description>^^J%
________________</rdf:li>^^J%
  }%
}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@declare@field}
% Declare a single field in a custom datatype required by an extension
% schema.  |\hyxmp@declare@field| takes as input an optional type
% (defaults to \xmpterm{Text}) and a mandatory name and description.
% \changes{v4.0}{2019/03/16}{Replaced
%   \protect\cs{hyxmp@declare@resource} with this macro}
%    \begin{macrocode}
\newcommand{\hyxmp@declare@field}[3][Text]{%
  \hyxmp@add@to@xml{%
______________________<rdf:li rdf:parseType="Resource">^^J%
________________________<pdfaField:name>#2</pdfaField:name>^^J%
________________________<pdfaField:valueType>#1</pdfaField:valueType>^^J%
________________________<pdfaField:description>#3</pdfaField:description>^^J%
______________________</rdf:li>^^J%
  }%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@pdf@extensions}
% Declare the Adobe \acro{PDF} schema.
% \changes{v5.0}{2020/02/27}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@pdf@extensions}{%
  \hyxmp@begin@ext@decl
      {Adobe PDF Schema}%
      {pdf}%
      {http://ns.adobe.com/pdf/1.3/}%
  \hyxmp@declare@property
      {Trapped}%
      {internal}%
      {Indication if the document has been modified to include trapping information}%
  \hyxmp@end@ext@decl
}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@mm@extensions}
% Declare the \acro{XMP} Media Management schema.
% \changes{v4.0}{2019/03/15}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@mm@extensions}{%
  \hyxmp@begin@ext@decl
      {XMP Media Management Schema}%
      {xmpMM}%
      {http://ns.adobe.com/xap/1.0/mm/}%
  \hyxmp@declare@property
      [URI]
      {DocumentID}%
      {internal}%
      {UUID based identifier for all versions and renditions of a document}%
  \hyxmp@declare@property
      [URI]
      {InstanceID}%
      {internal}%
      {UUID based identifier for specific incarnation of a document}%
  \hyxmp@declare@property
      {VersionID}%
      {internal}%
      {Document version identifier}%
  \hyxmp@declare@property
      {RenditionClass}%
      {internal}%
      {The manner in which a document is rendered}%
  \hyxmp@end@ext@decl
}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@pdfa@id@extensions}
% Declare the \acro{PDF/A} Identification schema~\cite{PDFA2008:xmp-props}.
% \changes{v4.0}{2019/03/15}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@pdfa@id@extensions}{%
  \hyxmp@begin@ext@decl
      {PDF/A Identification Schema}%
      {pdfaid}%
      {http://www.aiim.org/pdfa/ns/id/}%
  \hyxmp@declare@property
      [Integer]%
      {part}%
      {internal}%
      {Part of PDF/A standard}%
  \hyxmp@declare@property
      {conformance}%
      {internal}%
      {Conformance level of PDF/A standard}%
  \hyxmp@end@ext@decl
}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@pdfua@id@extensions}
% Declare the \acro{PDF/UA} Universal Accessibility schema.
% \changes{v5.0}{2020/02/15}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@pdfua@id@extensions}{%
  \hyxmp@begin@ext@decl
      {PDF/UA Universal Accessibility Schema}%
      {pdfuaid}%
      {http://www.aiim.org/pdfua/ns/id/}%
  \hyxmp@declare@property
      [Integer]%
      {part}%
      {internal}%
      {Part of ISO 14289 standard}%
  \hyxmp@end@ext@decl
}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@pdfx@id@extensions}
% Declare the schema used pre-\PDFstd{X}{4}{}{}.  Because Adobe Acrobat DC
% (at least) defines this even for \PDFstd{X}{4}{}{} and later, we follow
% suit.
% \changes{v5.0}{2020/02/26}{Added this macro}
%    \begin{macrocode}
\newcommand*{\hyxmp@pdfx@id@extensions}{%
  \ifx\hyxmp@pdfx@major\empty
  \else
    \hyxmp@begin@ext@decl
        {Adobe Document Info PDF/X eXtension Schema}%
        {pdfx}%
        {http://ns.adobe.com/pdfx/1.3/}%
    \hyxmp@declare@property
        {GTS_PDFXVersion}%
        {internal}%
        {ID of PDF/X standard}%
    \hyxmp@declare@property
        {GTS_PDFXConformance}%
        {internal}%
        {Conformance level of PDF/X standard}%
    \hyxmp@end@ext@decl
  \fi
%    \end{macrocode}
% Declare the schema used in \PDFstd{X}{4}{}{} and later versions.
%    \begin{macrocode}
  \@tempcnta=0\hyxmp@pdfx@major\relax
  \ifnum\@tempcnta>3
    \hyxmp@begin@ext@decl
        {PDF/X ID Schema}%
        {pdfxid}%
        {http://www.npes.org/pdfx/ns/id/}%
    \hyxmp@declare@property
        {GTS_PDFXVersion}%
        {internal}%
        {ID of PDF/X standard}%
    \hyxmp@end@ext@decl
  \fi
}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@iptc@extensions}
% \changes{v2.2}{2012/12/13}{Added this macro to support
%   \acro{PDF/A} generation}
% \changes{v2.3}{2013/01/08}{Gave the
%   \xmpprop{Iptc4xmpCore:CreatorContactInfo} fields a unique
%   \xmpprop{pdfaType:prefix} to better support conversion of the
%   document to \acro{PDF/A}}
% \changes{v4.0}{2019/03/09}{Moved the header code from here into
%   \protect\cs{hyxmp@begin@extension@decls} and the trailer code
%   from here into \protect\cs{hyxmp@end@extension@decls}}
% \changes{v4.0}{2019/03/16}{Rewrote to more closely honor the
%   \acro{XMP} specification}
% Because \acro{IPTC} metadata are not recognized by the \acro{PDF/A}
% standard, \acro{PDF/A} conversion would normally fail for documents
% that utilize \acro{IPTC} metadata.  Declaring the \acro{IPTC}
% metadata we support enables the document to be converted to
% \acro{PDF/A} format.
%    \begin{macrocode}
\newcommand*{\hyxmp@iptc@extensions}{%
  \hyxmp@begin@ext@decl
      {IPTC Core Schema}%
      {Iptc4xmpCore}%
      {http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/}%
  \hyxmp@declare@property
      [ContactInfo]
      {CreatorContactInfo}
      {external}
      {Document creator's contact information}
%    \end{macrocode}
% We can't call |\hyxmp@end@ext@decl| because we need first need to
% define the \xmpprop{Iptc4xmpCore:ContactInfo} structure.
%    \begin{macrocode}
  \hyxmp@add@to@xml{%
______________</rdf:Seq>^^J%
____________</pdfaSchema:property>^^J%
____________<pdfaSchema:valueType>^^J%
______________<rdf:Seq>^^J%
________________<rdf:li rdf:parseType="Resource">^^J%
__________________<pdfaType:type>ContactInfo</pdfaType:type>^^J%
__________________<pdfaType:namespaceURI>http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/</pdfaType:namespaceURI>^^J%
__________________<pdfaType:prefix>Iptc4xmpCore</pdfaType:prefix>^^J%
__________________<pdfaType:description>%
                   Basic set of information to get in contact with a person%
                 </pdfaType:description>^^J%
__________________<pdfaType:field>^^J%
____________________<rdf:Seq>^^J%
  }%
  \hyxmp@declare@field
      {CiAdrCity}%
      {Contact information city}%
  \hyxmp@declare@field
      {CiAdrCtry}%
      {Contact information country}%
  \hyxmp@declare@field
      {CiAdrExtadr}%
      {Contact information address}%
  \hyxmp@declare@field
      {CiAdrPcode}%
      {Contact information local postal code}%
  \hyxmp@declare@field
      {CiAdrRegion}%
      {Contact information regional information such as state or province}%
  \hyxmp@declare@field
      {CiEmailWork}%
      {Contact information email address(es)}%
  \hyxmp@declare@field
      {CiTelWork}%
      {Contact information telephone number(s)}%
  \hyxmp@declare@field
      {CiUrlWork}%
      {Contact information Web URL(s)}%
  \hyxmp@add@to@xml{%
____________________</rdf:Seq>^^J%
__________________</pdfaType:field>^^J%
________________</rdf:li>^^J%
______________</rdf:Seq>^^J%
____________</pdfaSchema:valueType>^^J%
__________</rdf:li>^^J%
  }%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@prism@extensions}
% \changes{v4.0}{2019/03/15}{Added this macro}
% Because \acro{PRISM} metadata are not recognized by the \acro{PDF/A}
% standard, \acro{PDF/A} conversion would normally fail for documents
% that utilize \acro{PRISM} metadata.  Declaring the \acro{PRISM}
% metadata we support enables the document to be converted to
% \acro{PDF/A} format.
%    \begin{macrocode}
\newcommand*{\hyxmp@prism@extensions}{%
  \hyxmp@begin@ext@decl
      {PRISM Basic Metadata}%
      {prism}%
      {http://prismstandard.org/namespaces/basic/2.1/}%
  \hyxmp@declare@property
      {complianceProfile}%
      {internal}%
      {PRISM specification compliance profile to which this document adheres}%
  \hyxmp@declare@property
      {publicationName}%
      {external}%
      {Publication name}%
  \hyxmp@declare@property
      {aggregationType}%
      {external}%
      {Publication type}%
  \hyxmp@declare@property
      {bookEdition}%
      {external}%
      {Edition of the book in which the document was published}%
  \hyxmp@declare@property
      {volume}%
      {external}%
      {Publication volume number}%
  \hyxmp@declare@property
      {number}%
      {external}%
      {Publication issue number within a volume}%
  \hyxmp@declare@property
      {pageRange}%
      {external}%
      {Page range for the document within the print version of its publication}%
  \hyxmp@declare@property
      {issn}%
      {external}%
      {ISSN for the printed publication in which the document was published}%
  \hyxmp@declare@property
      {eIssn}%
      {external}%
      {ISSN for the electronic publication in which the document was published}%
  \hyxmp@declare@property
      {isbn}%
      {external}%
      {ISBN for the publication in which the document was published}%
  \hyxmp@declare@property
      {doi}%
      {external}%
      {Digital Object Identifier for the document}%
  \hyxmp@declare@property
      [URL]
      {url}%
      {external}%
      {URL at which the document can be found}%
  \hyxmp@declare@property
      [Integer]
      {byteCount}%
      {internal}%
      {Approximate file size in octets}%
  \hyxmp@declare@property
      [Integer]
      {pageCount}%
      {internal}%
      {Number of pages in the print version of the document}%
  \hyxmp@declare@property
      {subtitle}%
      {external}%
      {Document's subtitle}%
  \hyxmp@end@ext@decl
}%
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@declare@extensions}
% Declare all \acro{XMP} extension schemata.  We'll always have at least
% one, the \acro{XMP} Media Management extensions, because we
% automatically generate \xmpprop{xmpMM:DocumentID} and
% \xmpprop{xmpMM:InstanceID}
% values.
%    \begin{macrocode}
\newcommand*{\hyxmp@declare@extensions}{%
  \hyxmp@begin@extension@decls
%    \end{macrocode}
% Declare the Adobe \acro{PDF} schema (always present).
%    \begin{macrocode}
  \hyxmp@pdf@extensions
%    \end{macrocode}
% Declare the \acro{XMP} Media Management extensions (always present).
%    \begin{macrocode}
  \hyxmp@mm@extensions
%    \end{macrocode}
% Declare the \acro{PDF/A} Identification extensions, but only when
% generating a \acro{PDF/A} document.
%    \begin{macrocode}
  \ifHy@pdfa
    \hyxmp@pdfa@id@extensions
  \fi
%    \end{macrocode}
% Conditionally declare the \acro{PDF/UA} Universal Accessibility
% extensions.
%    \begin{macrocode}
  \ifx\@pdfuapart\@empty
  \else
    \hyxmp@pdfua@id@extensions
  \fi
%    \end{macrocode}
% \begin{macro}{\next}
% Conditionally declare the \acro{PDF/X} extensions.
%    \begin{macrocode}
  \ifx\@pdfxversion\@empty
  \else
    \hyxmp@pdfx@id@extensions
  \fi
%    \end{macrocode}
% \end{macro}
% Conditionally declare \acro{IPTC} photo metadata extensions.
%    \begin{macrocode}
  \ifx\hyxmp@iptc@data\@empty
  \else
    \hyxmp@iptc@extensions
  \fi
%    \end{macrocode}
% Conditionally declare \acro{PRISM} basic metadata extensions.
%    \begin{macrocode}
  \ifx\hyxmp@prism@data\@empty
  \else
    \hyxmp@prism@extensions
  \fi
%    \end{macrocode}
%    \begin{macrocode}
  \hyxmp@end@extension@decls
}
%    \end{macrocode}
% \end{macro}
%
% \subsubsection{Combining schemata into an XMP packet}
% \label{sec:combining-schemata}
%
% \begin{macro}{\hyxmp@bom}
% Define a macro for the \term{Unicode} byte-order marker (\acro{BOM}).
% \changes{v2.0}{2012/08/02}{Added by Heiko Oberdiek}
%    \begin{macrocode}
\begingroup
  \ifhyxmp@unicodetex
    \lccode`\!="FEFF %
    \lowercase{%
      \gdef\hyxmp@bom{!}
    }%
  \else
    \catcode`\^^ef=12
    \catcode`\^^bb=12
    \catcode`\^^bf=12
    \gdef\hyxmp@bom{^^ef^^bb^^bf}%
  \fi
\endgroup
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@construct@packet}
% \changes{v1.1}{2006/05/21}{Explicitly set the category codes of
%   characters \string\meta{EF}, \string\meta{BB}, and
%   \string\meta{BF} to ``letter''.  Thanks to Daniel Sch\"omer for
%   the bug report}
% \changes{v2.0}{2012/08/02}{Modified by Heiko Oberdiek to use an
%   appropriate \acro{BOM} representation via
%   \texttt{\string\string\string\hyxmp@bom}}
% \begin{macro}{\hyxmp@xml}
% Successively add \acro{XML} data to |\hyxmp@xml| until we have
% something we can insert into the document's \acro{PDF} catalog.
%    \begin{macrocode}
\def\hyxmp@construct@packet{%
  \gdef\hyxmp@xml{}%
  \hyxmp@add@to@xml{<?xpacket begin="\hyxmp@bom" %
id="W5M0MpCehiHzreSzNTczkc9d"?>^^J%
<x:xmpmeta xmlns:x="adobe:ns:meta/">^^J%
__<rdf:RDF %
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns\hyxmp@hash">^^J%
____<rdf:Description rdf:about=""^^J%
%    \end{macrocode}
% Specify every namespace we can potentially use, even the ones we end
% up not actually using.
%    \begin{macrocode}
_____________________xmlns:pdf="http://ns.adobe.com/pdf/1.3/"^^J%
_____________________xmlns:xmpRights="http://ns.adobe.com/xap/1.0/rights/"^^J%
_____________________xmlns:dc="http://purl.org/dc/elements/1.1/"^^J%
_____________________xmlns:photoshop="http://ns.adobe.com/photoshop/1.0/"^^J%
_____________________xmlns:xmp="http://ns.adobe.com/xap/1.0/"^^J%
_____________________xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/"^^J%
_____________________xmlns:stEvt="http://ns.adobe.com/xap/1.0/sType/ResourceEvent\hyxmp@hash"^^J%
_____________________xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/"^^J%
_____________________xmlns:pdfuaid="http://www.aiim.org/pdfua/ns/id/"^^J%
_____________________xmlns:pdfx="http://ns.adobe.com/pdfx/1.3/"^^J%
_____________________xmlns:pdfxid="http://www.npes.org/pdfx/ns/id/"^^J%
_____________________xmlns:prism="http://prismstandard.org/namespaces/basic/2.1/"^^J%
_____________________xmlns:Iptc4xmpCore="http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/"^^J%
_____________________xmlns:pdfaExtension="http://www.aiim.org/pdfa/ns/extension/"^^J%
_____________________xmlns:pdfaSchema="http://www.aiim.org/pdfa/ns/schema\hyxmp@hash"^^J%
_____________________xmlns:pdfaProperty="http://www.aiim.org/pdfa/ns/property\hyxmp@hash"^^J%
_____________________xmlns:pdfaType="http://www.aiim.org/pdfa/ns/type\hyxmp@hash"^^J%
_____________________xmlns:pdfaField="http://www.aiim.org/pdfa/ns/field\hyxmp@hash">^^J%
  }%
%    \end{macrocode}
% Declare non-standard schemata.
%    \begin{macrocode}
  \hyxmp@check@iptc@data
  \hyxmp@check@prism@data
  \hyxmp@declare@extensions
%    \end{macrocode}
% Insert all the metadata we know how to insert.
%    \begin{macrocode}
  \hyxmp@pdf@schema
  \hyxmp@xmpRights@schema
  \hyxmp@dc@schema
  \hyxmp@photoshop@schema
  \hyxmp@xmp@basic@schema
  \hyxmp@pdfa@id@schema
  \hyxmp@pdfua@id@schema
  \hyxmp@pdfx@id@schema
  \hyxmp@mm@schema
  \hyxmp@iptc@schema
  \hyxmp@prism@schema
  \hyxmp@add@to@xml{%
____</rdf:Description>^^J%
__</rdf:RDF>^^J%
</x:xmpmeta>^^J%
\hyxmp@padding
<?xpacket end="w"?>^^J%
  }%
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
%
% \subsection{Embedding the XMP packet}
%
% The \acro{PDF} specification says that ``a metadata stream may be
% attached to a document through the \pdfterm{Metadata} entry in the
% document catalogue''~\cite{Adobe2008:PDF} so that's what we do here.
%
% \begin{macro}{\hyxmp@embed@packet}
% \begin{macro}{\hyxmp@driver}
% Determine which \pkgname{hyperref} driver is in use and invoke the
% appropriate embedding function.
%    \begin{macrocode}
\newcommand*{\hyxmp@embed@packet}{%
  \hyxmp@construct@packet
  \def\hyxmp@driver{hpdftex}%
  \ifx\hyxmp@driver\Hy@driver
    \hyxmp@embed@packet@pdftex
  \else
    \def\hyxmp@driver{hluatex}%
    \ifx\hyxmp@driver\Hy@driver
      \hyxmp@embed@packet@luatex
    \else
      \def\hyxmp@driver{hdvipdfm}%
      \ifx\hyxmp@driver\Hy@driver
        \hyxmp@embed@packet@dvipdfm
      \else
        \def\hyxmp@driver{hxetex}%
        \ifx\hyxmp@driver\Hy@driver
          \hyxmp@embed@packet@xetex
        \else
          \@ifundefined{pdfmark}{%
            \PackageWarningNoLine{hyperxmp}{%
              Unrecognized hyperref driver `\Hy@driver'.\MessageBreak
              \jobname.tex's XMP metadata will *not* be\MessageBreak
              embedded in the resulting file}%
          }{%
            \hyxmp@embed@packet@pdfmark
          }%
        \fi
      \fi
    \fi
  \fi
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \subsubsection{Embedding using \pdfTeX}
%
% Up to version~0.85, \LuaTeX\ supported the \pdfTeX\ primitives, and
% \pkgname{hyperref} didn't distinguish the two backends.  However, from
% \pkgname{hyperxmp}'s perspective there is one key difference: the
% effect of |\pdfcompresslevel| is local to a group in \pdfTeX\ but is
% global in \LuaTeX\@.
%
% The \acro{PDF} object representing the \acro{XMP} packet is supposed
% to include an uncompressed stream so it can be read by
% non-\acro{PDF}-aware tools.  However, we don't want to unnecessarily
% uncompress \emph{every} \acro{PDF} stream.  The solution, provided by
% Hans Hagen on the |luatex| mailing list (thread:
% \href{http://tug.org/pipermail/luatex/2016-July/006077.html}{``Leaving
%   a single \acro{PDF} object uncompressed''}, 6\,\textsc{Jul}\,2016),
% is to provide the |uncompressed| flag to |\pdfobj|.  Our definition of
% |\hyxmp@embed@packet@pdftex| uses the \pkgname{ifluatex} package to
% distinguish the \pdfTeX\ case from the pre-0.85 \LuaTeX\ case.
%
%    \begin{macrocode}
\RequirePackage{ifluatex}
%    \end{macrocode}
%
% \begin{macro}{\hyxmp@embed@packet@pdftex}
% Embed the \acro{XMP} packet using \pdfTeX\ primitives, which are
% supported by both \pdfTeX\ and pre-0.85 \LuaTeX.  The only difference
% is that in the former case we locally specify |\pdfcompresslevel=0| to
% leave the \acro{PDF} object uncompressed while in the latter case we
% pass the |uncompressed| flag to |\pdfobj| to achieve the same effect.
% \changes{v3.1}{2016/07/06}{Leave the \protect\acro{XMP} packet---and
%   only the \protect\acro{XMP} packet---uncompressed in both
%   \protect\pdfTeX\ and pre-0.85 \protect\LuaTeX}
%    \begin{macrocode}
\newcommand*{\hyxmp@embed@packet@pdftex}{%
  \bgroup
    \ifluatex
    \else
      \pdfcompresslevel=0
    \fi
    \immediate\pdfobj \ifluatex uncompressed\fi stream attr {%
      /Type /Metadata
      /Subtype /XML
    }{\hyxmp@xml}%
    \pdfcatalog {/Metadata \the\pdflastobj\space 0 R}%
  \egroup
}
%    \end{macrocode}
% \end{macro}
%
% \subsubsection{Embedding using \LuaTeX~0.85+}
%
% \begin{macro}{\hyxmp@embed@packet@luatex}
% Embed the \acro{XMP} packet using \LuaTeX~0.85+ primitives.
% \changes{v3.0}{2016/07/02}{Added this macro}
% \changes{v3.1}{2016/07/06}{Updated to use
%   \protect\texttt{\string\string\string\pdfextension\ obj uncompressed}
%   as suggested by Hans Hagen}
%    \begin{macrocode}
\newcommand*{\hyxmp@embed@packet@luatex}{%
  \immediate\pdfextension obj uncompressed stream attr {%
    /Type /Metadata
    /Subtype /XML
  }{\hyxmp@xml}%
  \pdfextension catalog {/Metadata \the\numexpr\pdffeedback lastobj\relax\space 0 R}%
}
%    \end{macrocode}
% \end{macro}
%
% \subsubsection{Embedding using any \texttt{pdfmark}-based backend}
%
% \begin{macro}{\hyxmp@embed@packet@pdfmark}
% Embed the \acro{XMP} packet using \pkgname{hyperref}'s |\pdfmark|
% command.  I believe |\pdfmark| is used by the \optname{dvipdf},
% \optname{dvipsone}, \optname{dvips}, \optname{dviwindo},
% \optname{nativepdf}, \optname{pdfmark}, \optname{ps2pdf},
% \optname{textures}, and \optname{vtexpdfmark} options to
% \pkgname{hyperref}, but I've tested only a few of those.
%    \begin{macrocode}
\newcommand*{\hyxmp@embed@packet@pdfmark}{%
  \pdfmark{%
    pdfmark=/NamespacePush
  }%
  \pdfmark{%
    pdfmark=/OBJ,
    Raw={/_objdef \string{hyxmp@Metadata\string} /type /stream}%
  }%
  \pdfmark{%
    pdfmark=/PUT,
    Raw={\string{hyxmp@Metadata\string}
      2 dict begin
        /Type /Metadata def
        /Subtype /XML def
        currentdict
      end
    }%
  }%
  \pdfmark{%
    pdfmark=/PUT,
    Raw={\string{hyxmp@Metadata\string} (\hyxmp@xml)}%
  }%
  \pdfmark{%
    pdfmark=/Metadata,
    Raw={\string{Catalog\string} \string{hyxmp@Metadata\string}}%
  }%
  \pdfmark{%
    pdfmark=/NamespacePop
  }%
}
%    \end{macrocode}
% \end{macro}
%
% \subsubsection{Embedding using \texttt{dvipdfm}}
%
% \begin{macro}{\hyxmp@embed@packet@dvipdfm}
% Embed the \acro{XMP} packet using \cmdname{dvipdfm}-specific
% |\special| commands.  Note that \cmdname{dvipdfm} rather irritatingly
% requires us to count the number of characters in the |\hyxmp@xml|
% stream ourselves.
%    \begin{macrocode}
\newcommand*{\hyxmp@embed@packet@dvipdfm}{%
  \hyxmp@string@len{\hyxmp@xml}%
  \special{pdf: object @hyxmp@Metadata
    <<
      /Type /Metadata
      /Subtype /XML
      /Length \the\@tempcnta
    >>
    stream^^J\hyxmp@xml endstream%
  }%
  \special{pdf: docview
    <<
      /Metadata @hyxmp@Metadata
    >>
  }%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@string@len}
% Set |\@tempcnta| to the number of characters in a given string~(|#1|).
% The approach is first to tally the number of space characters then to
% tally the number of non-space characters.  While this is rather
% sloppy I haven't found a better way to achieve the same effect,
% especially given that all of the characters in |#1| have already been
% assigned their category codes.
%    \begin{macrocode}
\newcommand*{\hyxmp@string@len}[1]{%
  \@tempcnta=0
  \expandafter\hyxmp@count@spaces#1 {} %
  \expandafter\hyxmp@count@non@spaces#1{}%
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@count@spaces}
% Count the number of spaces in a given string.  We rely on the built-in
% pattern matching of \tex's |\def| primitive to pry one word at a time
% off the head of the input string.
%    \begin{macrocode}
\def\hyxmp@count@spaces#1 {%
  \def\hyxmp@one@token{#1}%
  \ifx\hyxmp@one@token\@empty
    \advance\@tempcnta by -1
  \else
    \advance\@tempcnta by 1
    \expandafter\hyxmp@count@spaces
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\hyxmp@count@non@spaces}
% Count the number of non-spaces in a given string.  Ideally, we'd count
% both spaces and non-spaces but \tex\ won't bind |#1| to a space
% character (category code~10).  Hence, in each iteration, |#1| is bound
% to the next non-space character only.
%    \begin{macrocode}
\newcommand*{\hyxmp@count@non@spaces}[1]{%
  \def\hyxmp@one@token{#1}%
  \ifx\hyxmp@one@token\@empty
  \else
    \advance\@tempcnta by 1
    \expandafter\hyxmp@count@non@spaces
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \subsubsection{Embedding using \XeTeX}
%
% \begin{macro}{\hyxmp@embed@packet@xetex}
% Embed the \acro{XMP} packet using \cmdname{xdvipdfmx}-specific
% |\special| commands.  I don't know how to tell \cmdname{xdvipdfmx}
% always to leave the \pdfterm{Metadata} stream uncompressed, so the
% \acro{XMP} metadata is likely to be missed by non-\acro{PDF}-aware
% \acro{XMP} viewers.
%    \begin{macrocode}
\newcommand*{\hyxmp@embed@packet@xetex}{%
  \special{pdf:stream @hyxmp@Metadata (\hyxmp@xml)
    <<
      /Type /Metadata
      /Subtype /XML
    >>
  }%
  \special{pdf:put @catalog
    <<
      /Metadata @hyxmp@Metadata
    >>
  }%
}
%    \end{macrocode}
% \end{macro}
%
%
% \subsection{Final clean-up}
% \label{sec:clean-up}
%
% Having saved the category code of
% ``\,{\fontencoding{T1}\selectfont\textquotedbl}\,'' at the start of
% the package code (Section~\ref{sec:initial-prep}), we now restore that
% character's original category code.
%
%    \begin{macrocode}
\catcode`\"=\hyxmp@dq@code
%    \end{macrocode}
%
% \iffalse
%</package>
% \fi
%
% \iffalse
%<*doc-helper>
% \fi
%
% ^^A  There's not much point including the documentation helper code
% ^^A  in the documentation itself, but feel free to remove the
% ^^A  following |\iffalse| and matching |\fi| if you'd like to include
% ^^A  it.
% \iffalse
%
% \section{Documentation helper code}
%
% The following code is used to make |hyperxmp.pdf| compliant with the
% \PDFstd{A}{1}{b}{} standard, at least when built from \pdfLaTeX\ or
% \LuaLaTeX, but not currently \XeLaTeX\@.  We include this code in a
% separate file because (a)~it is less distracting squirreled away here
% than placed at the top of the |.dtx| file, and (b)~putting it in a
% separate file makes it easy to disable.  One simply needs to comment
% out the |\input{hyperxmp-stds}| line to produce an ordinary \acro{PDF}
% file, which offers the benefit of live hyperlinks in almost all
% \acro{PDF} readers.
%
% \subsection{Ensuring proper support}
%
% \begin{macro}{\next}
% We can't proceed without a color profile.  For this document we use a
% \acro{CMYK} profile, specifically uncoated FOGRA29L, as a small and
% thus safe color space.  As long as |FOGRA29L_uncoated.icc| lies in the
% \tex\ search path (which normally includes the current directory),
% we'll be able to find it.
%    \begin{macrocode}
\let\next=\endinput
\IfFileExists{FOGRA29L_uncoated.icc}
             {\let\next=\relax}
             {}
\next
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\next}
% We can't proceed unless we're running either \pdfLaTeX\ or
% \LuaLaTeX\@.  \XeLaTeX\ doesn't appear to support all of the
% mechanisms required below to support \PDFstd{A}{1}{b}{} compliance.
% If you know how to adapt the following code to \XeLaTeX, please
% contact the \pkgname{hyperxmp} maintainer.
%    \begin{macrocode}
\let\next=\endinput
\ifPDFTeX
  \let\next=\relax
\else
  \ifLuaTeX
    \usepackage{luatex85}
    \let\next=\relax
  \fi
\fi
\next
%    \end{macrocode}
% \end{macro}
%
% If we're here, we should be able to make |hyperxmp.pdf|
% \PDFstd{A}{1}{b}{}-compliant.
%    \begin{macrocode}
\def\wantpdfstandards{}
\typeout{Generating PDF/A-1b compliant hyperxmp documentation.}
%    \end{macrocode}
%
% \subsection{Complying with the PDF/A-1b standard}
%
% We can't specify \PDFstd{A}{1}{b}{} compliance until after both
% \pkgname{hyperref} and \pkgname{hyperxmp} are loaded so we do so at
% the beginning of the document.
%    \begin{macrocode}
\AtBeginDocument{%
  \hypersetup{%
    pdfapart=1,
    pdfaconformance=b
  }%
}
%    \end{macrocode}
%
% \PDFstd{A}{1}{b}{} forbids object compression.  This is normally the
% default for \pdfLaTeX, but the \TeX\ Live distribution changes the
% default to compression level~2.  Here we explicitly change it back
% to~0.
%    \begin{macrocode}
\pdfobjcompresslevel=0
%    \end{macrocode}
%
% We specify an uncoated FOGRA29 output intent for both
% \PDFstd{A}{1}{b}{} and \acro{PDF/X} (all versions).
%    \begin{macrocode}
\immediate\pdfobj stream attr {/N 4} file {FOGRA29L_uncoated.icc}
\edef\iccobj{\the\pdflastobj}
\pdfcatalog{%
  /OutputIntents [
    <<
      /Type /OutputIntent
      /S /GTS_PDFA1
      /DestOutputProfile \iccobj\space 0 R
      /OutputConditionIdentifier (Uncoated FOGRA29)
      /Info (FOGRA29L)
    >>
    <<
      /Type /OutputIntent
      /S /GTS_PDFX
      /DestOutputProfile \iccobj\space 0 R
      /OutputConditionIdentifier (Uncoated FOGRA29)
      /Info (FOGRA29L)
    >>
  ]
}
%    \end{macrocode}
%
% \begin{macro}{\HyColor@HyperrefBorderColor}
% We just specified a \acro{CMYK} color profile, but \pkgname{hyperref}
% normally produces \acro{RGB} link borders.  The following code
% instructs \pkgname{hyperref} to accept \acro{CMYK} colors.
%    \begin{macrocode}
\makeatletter
\AtBeginDocument{%
  \let\HyColor@HyperrefBorderColor\HyColor@XZeroOneThreeFour
}
\makeatother
%    \end{macrocode}
% \end{macro}
%
% \pkgname{hyperref}'s default colors are specified as \acro{RGB}\@.  We
% need to reassign them so they take on \acro{CMYK} values.  (Note that
% the main document already loaded the \pkgname{xcolor} package with the
% \optname{cmyk} option.)  Annoyingly, very few \acro{PDF} readers
% correctly color hyperlinks defined with \acro{CMYK} link borders.  At
% the time of this writing (March 2020), Adobe Acrobat DC displays the
% \emph{reverse} of the specified color, presumably because it always
% interprets the first three color channels as red, green, and blue.
% Other browsers display no border or a black border.  This is not a
% huge problem in practice because (a)~it's more important to be able to
% distinguish hyperlinks from regular text than to render with correct
% border colors and (b)~\acro{PDF} readers may suppress hyperlink
% borders anyway for \PDFstd{A}{1}{b}{} documents.
%    \begin{macrocode}
\AtBeginDocument{%
  \hypersetup{%
    citebordercolor=green,
    linkbordercolor=red,
    urlbordercolor=cyan
  }%
}
%    \end{macrocode}
%
% \begin{macro}{\@tempdima}
% \begin{macro}{\boxwd}
% \begin{macro}{\boxht}
% \begin{macro}{\next}
% Explicitly specify the \pdfterm{BleedBox} and \pdfterm{TrimBox} to use
% for every page of the documentation.
%    \begin{macrocode}
\makeatletter
\@tempdima=0.996264\paperwidth
\edef\boxwd{\strip@pt\@tempdima}
\@tempdima=0.996264\paperheight
\edef\boxht{\strip@pt\@tempdima}
\makeatother
\edef\next{%
  \protect\pdfpageattr{
    /BleedBox [0.0 0.0 \boxwd\space \boxht]
    /TrimBox [0.0 0.0 \boxwd\space \boxht]
    /StructParents 0
    /Tabs /S
  }%
}
\next
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \fi
%
% \iffalse
%</doc-helper>
% \fi
%
% \Finale
\endinput