Module node_ops 

Node operations for XPath evaluation.

This module implements XPath 2.0 node comparison and navigation operations:

• is (node identity)
• << (precedes in document order)
• >> (follows in document order)
• Root navigation

Functions

are_siblings

Check if two nodes are siblings (same parent).

compare_document_order

Compare two nodes by document order.

context_node

Get the context node from an optional context.

following_node

Check if node a follows node b in document order.

get_root

Get the root node from a given node.

is_ancestor

Check if node ancestor is an ancestor of node descendant.

is_descendant

Check if node descendant is a descendant of node ancestor.

is_root

Check if a node is the document root.

preceding_node

Check if node a precedes node b in document order.

same_node

Check if two nodes are identical (same node).