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2 <!ENTITY % ug-ent SYSTEM "../users_guide/ug-ent.sgml">
3 <!ENTITY ug-book SYSTEM "../users_guide/ug-book.sgml">
5 <!ENTITY % hslibs-ent SYSTEM "../../../hslibs/doc/hslibs-ent.sgml">
6 <!ENTITY hslibs-book SYSTEM "../../../hslibs/doc/hslibs-book.sgml">
11 <book id="book-users-guide">
15 <book id="book-hslibs">