L elements can be used both in
   <a href="documents.html#syntax-document-html" id="syntax-document-html_xref11">documents in the HTML syntax</a>
   and in 
   <a href="documents.html#syntax-document-xml" id="syntax-document-xml_xref10">documents in the XML syntax</a>.
   Syntax rules for SVG and MathML elements in
   <a href="documents.html#syntax-document-xml" id="syntax-document-xml_xref11">documents in the XML syntax</a>
   are defined in the XML specification
   <a href="references.html#refsXML" id="re