<xsl:comment>
The <xsl:comment> element writes a comment to the output document. It must include only text.
Syntax
xml
<xsl:comment>
TEMPLATE
</xsl:comment>
Required Attributes
None.
Optional Attributes
None.
Type
Instruction, appears within a template.
Specifications
XSLT, section 7.4.
Gecko support
Supported.