XPointers

• A syntax for addressing into an XML document

• Extend XPath to support non-well-formed points and ranges

• Used by XLink and XInclude

xpointer(id("ebnf"))
xpointer(descendant::language[position()=2])
ebnf
xpointer(/child::spec/child::body/child::*/child::language[2])
xpointer(/spec/body/*/language[2])
/1/14/2
xpointer(id("ebnf"))xpointer(id("EBNF"))