xsl:override

Partial experimental implementation in Saxon 9.6.

Content: ( xsl:template | xsl:function | xsl:accumulator | xsl:variable | xsl:param | xsl:attribute-set )*
Permitted parent elements: xsl:use-package
Element has no attributes

Notes on the Saxon implementation

New in XSLT 3.0. Partial experimental implementation in Saxon 9.6. Not fully tested; use with caution!

Links to W3C specifications

XSLT 3.0 Specification