If you are using XSLT to transform XML documents into HTML for display within a website and you have found that your ,
and other regularly self-closing tags are not being closed in the transform output its a good chance you need to take a look at the output method being used by the XSLT.
The output method of the XSLT determines just how strictly the output will follow the XML standard. Add the following to your XSLT:
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes" omit-xml-declaration="no"/>