Assuming you mean to say that the Extradata field contains the exact string of characters “MORE THAN 3 PAGES”, then you’d configure the Metadata Fields Management task this way:
Yes, Phil, “MORE THAN 3 PAGES” is the exact value to the field of _vger_fld_ExtraData. I tried the syntax you suggested GetMeta(_vger_fld_ExtraData[0], 10, Job.Group[?].Document[?]) Equal More Than 3 pages, it indeed worked.
I did have checked the online PlanePress user guide written by Objectif lune before I asked the question, but there wasn’t any sample to follow.