<?xml version="1.0" encoding="UTF-8"?>
-<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<!--
+ ||M|| This file is part of HELM, an Hypertextual, Electronic
+ ||A|| Library of Mathematics, developed at the Computer Science
+ ||T|| Department, University of Bologna, Italy.
+ ||I||
+ ||T|| HELM is free software; you can redistribute it and/or
+ ||A|| modify it under the terms of the GNU General Public License
+ \ / version 2 or (at your option) any later version.
+ \ / This software is distributed as is, NO WARRANTY.
+ V_______________________________________________________________ -->
+
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ xmlns="http://www.w3.org/1999/xhtml"
+>
<xsl:param name="baseurl"/>
<xsl:include href="ld-html-library.xsl"/>
<xsl:include href="ld-html-term.xsl"/>
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<xsl:include href="ld-html-root.xsl"/>
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- doctype-system="html"
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+ method="xml"
+ doctype-public="-//W3C//DTD XHTML 1.1//EN"
+ doctype-system="http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"
encoding="UTF-8"
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