f:xpointer-idref

f:xpointer-idref — Parses an XPointer for a same-document ID reference.

Function:

{http://docbook.org/ns/docbook/functions}xpointer-idref#1

Defined in:

modules/xlink.xsl

Used in:

main.xsl

Synopsis

f:xpointer-idref( $xpointer) as xs:string?

Description

In DocBook, there are generally two ways to refer to other elements in the current document by ID: using the linkend (or linkends) attribute or using the xlink:href attribute.

The f:xpointer-idref() function returns the ID portion of an XPointer that is a reference to another ID in the current document.

In other words:

f:xpointer-idref('#foo') is foo,
f:xpointer-idref('id(foo)') is foo,
and f:xpointer-idref('http://example.org/#foo') is the empty sequence.