Extension attributes (XSLT only)

An extension attribute is an extra attribute on an XSLT-defined element. These attributes are all in the Saxon namespace URI "". This namespace needs to be declared in a namespace declaration, but it does not need to be listed in the extension-element-prefixes attribute.

For example, the saxon:assignable attribute can be set as follows:

<xsl:variable name="counter" saxon:assignable="yes" 

The extension attributes provided with the Saxon product are as follows: