Extension attributes (XSLT only)

An extension attribute is an extra attribute on an XSLT-defined element. These attributes are all in the Saxon namespace http://saxon.sf.net/. 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" 
    xmlns:saxon="http://saxon.sf.net/">

         

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

• saxon:assignable: marks a variable as updateable

• saxon:explain: requests display of optimized expression tree

• saxon:memo-function: marks a function as a memo function

• saxon:read-once: enables serial processing of source documents

• saxon:threads: enables parallel processing of xsl:for-each instructions