xpath - What is // in XSLT? -

what // in xslt? (e.g. $currentpage//node)

what // in xslt? e.g. ($currentpage//node)

in xpath abbreviation:

// short /descendant-or-self::node()/

the value of attributes of xslt instructions (such select attribute) must xpath expression.

therefore,

($currentpage//node) 

stands for

($currentpage/descendant-or-self::node()/node) 

this selects elements named node children of nodes either contained in variable $currentpage or descendents of nodes contained in variable $currentpage.

do note in provided expression node() node-test (it selects node types on descendant-or-self:: axis, such elements, text nodes, comments , processing-instructions.

on other side, somepath/node shorthand somepath/child::node , selects elements named node children of context node.

i recommend not use name node element in order avoid confusion.