docs: def schema_match_up(doc, schema):
      '''
      SCHEMA mini-recompile for:
  
        each SEARCH then MATCH function
        each TYPE then CHOICE function
      
      given the doc, it returns a schema copy that implements the match
      '''
      copy = schema.copy(seq_prefix="", seq_suffix="")
      copy = _schema_match_up_search(doc, copy)
      copy = _schema_match_up_type_choice(doc, copy)
      return copy