id

The id() function returns a sequence containing all the elements in the same document as the context node (or as some other specified node), with given ID attribute values.

For example, if the code attribute is defined as an ID attribute, then the expression «id('A321-780') » might return the single element <product code="A321-780"> .

Argument	Data Type	Meaning
Values	xs:string*	Specifies the required ID values
document (optional)	node()	A node identifying the document in which the ID values are to be located. If omitted, the document containing the context node is used
Result	element()*	A sequence of nodes, in document order, containing the nodes with the required ID values