Given a sequence of nodes, returns those nodes in the sequence that have no ancestor that is also in the sequence.
outermost($seq as node()*) ➔ node()*
The input sequence
Links to W3C specifications
XPath 3.1 Functions and Operators
Available in XPath 3.0, XSLT 3.0, XQuery 3.0, and later versions. From Saxon 9.6, available in all editions.
Notes on the Saxon implementation
Available since Saxon 9.5.