BNF Code builder: Adding parent to column list to act as a filter

Myself and @HelenCEBM have come across a potential improvement in the codelist future (not urgent!) during making an anticoagulant codelist that is being used in at least 2 pharmacoepi style papers and in aftershocks work.

The first purpose of a codelist is to identify a patient group for a single research study but now we are starting to reuse it wold be good if it could be slghtly more flexible.

In the anticoagulant work we want to identify everyone on all the various "anticoagulant" VMPs/AMPs but subsequently in all the descriptive tables we want to report at chemical subtsance level (as opposed to "anticoaglants")

We could make a separate for each but using the backend we have added a further column chemical to act as a filter.

We were wondering if this could be made a feature of the builder? i.e. include parent as sometimes you may have a chapter and want to include subparagraphs.