eid is already selected via 'V is `Etype`'

Also : ccplugin - generator serves all actions, not split up by type
       es.py - add CUSTOM_ATTRIBUTES mechanism

`indexable_attributes` in yams return only String and Bytes

so it is easier to override this behavior

`esearch` view relies on this attr

[views] exact search on code (example with Did & unitid, and cote:search_term) should go into specific cube