In the context of the regex dialect of XSLT 2.0, I am looking for two "meta-regexes" that analyse other regexes. Each is discussed in a part of its own. (Part 1 posted as: Meta-regex for variable-length matching regexes (XSLT)) Part 2 Aim: A regex that provides for pre-calculating the length of the match that a fixed-length matching ...

In the context of the regex dialect of XSLT 2.0, I am looking for two "meta-regexes" that analyse other regexes. Each is discussed in a part of its own. (Part 2 posted as: Meta-regex to find fixed length of regex match (XSLT)) Part 1 Aim: A regex that would identify all those regexes that might yield matches of varying length, as ...