A Saxon extension instruction is invoked using a name such as <saxon:localname>.
The saxon prefix (or whatever prefix you choose to use) must be associated with the
Saxon namespace URI http://saxon.sf.net/. The prefix must also be designated as an
extension element prefix by including it in the
extension-element-prefixes attribute on the xsl:stylesheet element, or the
xsl:extension-element-prefixes attribute on any enclosing literal result element or
extension element.
However, top-level elements such as saxon:collation and
saxon:script can be used without
designating the prefix as an extension element prefix.
The extension instructions and declarations are:
saxon:assign: assigns a new value to a global variable
saxon:break: breaks out of a saxon:iterate loop
saxon:call-template: calls a template whose name is decided at run-time
saxon:catch: used within saxon:try to catch dynamic errors
saxon:collation: names and describes a collating sequence
saxon:continue: continues execution of a saxon:iterate loop
saxon:doctype: constructs a serialized DOCTYPE declaration
saxon:entity-ref: creates an entity reference in the serialized output
saxon:finally: continues execution of a saxon:iterate loop
saxon:import-query: imports functions from an XQuery library module
saxon:iterate: iterates over a sequence in order, allowing parameters to be set
saxon:mode: declares properties of a mode
saxon:script: declares an extension function
saxon:try: evaluates an expression with recovery from dynamic errors
saxon:while: iterates until a condition becomes false
