Match References, Variables and Fixed Strings
The <group>
and <data>
elements can reference match groups from parent expressions or from stored matches in variables. In the case of the <group>
element, referenced values are passed on to child expressions whereas the <data>
element can use match group references for name and value attributes. In the case of both elements the way of specifying references is the same.
Last modified October 6, 2025: Add section on v7.10 upgrade path (dcd5ca1)