The XLink specification defines an attribute with the name href.
The XHTML specification also uses href attributes on some elements.
And the XInclude specification uses href attributes.
An XSLT style sheet that will transform XHTML documents containing both Scalable Vector Graphics (SVG) pictures and MathML equations into XSL-Formatting object documents.
The a, title, script,
style and font elements in XHTML and SVG
The table element in XHTML and XSL-FO
The text element in XSLT and SVG
The set element in MathML and SVG
An XSLT stylesheet that transforms a style sheet in an older version of the XSLT specification to a style sheet in a newer version of the XSLT specification.