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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 11.3.3, p. II-77.
+% Original source in file "par2.TEX", starting line 1465.
+\wlog{L: "itemizel.tip" ["par2.TEX," l. 1465, p. II-77]}%
+% This file DOES belong to format "texip."
+\InputD{parv-1.tip}
+\catcode`\@ = 11
+\newcount\@ItemListDepth
+\@ItemListDepth = 0
+\def\BeginItemize{% 
+    \begingroup
+    \global\advance\@ItemListDepth by 1
+    \ifcase\@ItemListDepth\or
+        \@BeginItemizeLevelOne
+        \def\Item{\ItemLL{$\bullet$}}%
+    \or
+        \@BeginItemizeLevelTwo
+        \def\Item{\ItemLL{--}}%
+    \or
+        \@BeginItemizeLevelThree
+        \def\Item{\ItemLL{*}}%
+    \or
+        \@BeginItemizeLevelFour
+        \def\Item{\ItemLL{+}}%
+    \else
+        \errmessage{\string\BeginItemize: maximum nesting of
+            4 exceeded.}%
+    \fi
+}
+\def\EndItemize{% 
+    \EndAList
+    \endgroup
+    \global\advance\@ItemListDepth by -1
+}
+\catcode`\@ = 12