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+% This macro source file is from the four volume series
+% "TeX in Practice" by Stephan von Bechtolsheim, published
+% 1993 by Springer-Verlag, New York.
+% Copyright 1993 Stephan von Bechtolsheim.
+% No warranty or liability is assumed.
+% This macro may be copied freely if no fees other than
+% media cost or shipping charges are charged and as long
+% as this copyright and the following source code itself
+% is not changed. Please see the series for further information.
+%
+% Version: 1.0
+% Date: May 1, 1993
+%
+%
+% This source code is documented in 19.3.9, p. III-96.
+% Original source in file "tokens2.TEX", starting line 1430.
+\wlog{L: "cref-2a.tip" ["tokens2.TEX," l. 1430, p. III-96]}%
+% This file DOES NOT belong to format "texip."
+\InputD{namedef.tip}
+\catcode`\@ = 11
+\def\@NewLabel #1#2#3{%
+ \if\NameDefinedConditional{@REF-#1}%
+ \message{\string\@NewLabel: Label "#1" already defined.}%
+ \fi
+ \NameDef{@REF-#1}{{#2}{#3}}%
+}
+\catcode`\@ = 12