IDLSID ( contxt, ids, srtype, entys, nitems, ifail )
====================================================

  Identify entities by identifier

    Can be called from the GO.

Receives:
  KI_tag_part              *contxt         --- entity giving context for search
  KI_tag_list_int          *ids            --- ids of required entities
  KI_cod_ty                *srtype         --- type of required entities
                                           --- ( one of TYTOIN, TYTORG, TYTOSH,
                                           ---  TYTOFA, TYTOLO, TYTOED, TYTOVX,
                                           ---  TYGESU, TYGECU, TYGEPT, TYGETF,
                                           ---  TYADAT, TYADLI, TYADFE )

Returns:
  KI_tag_list_entity       *entys          --- required entities
  KI_int_nitems            *nitems         --- number of entries in 'entys'
  KI_cod_error             *ifail          --- error code

Specific errors:
  KI_bad_type_combn         'srtype' inconsistent with 'contxt'
  KI_bad_type               'srtype' is invalid

Description:
  The part 'contxt' is searched for entities with identifiers in the list
  'ids' and of type 'srtype'.  These entities are returned in 'entys'.  A NULTAG
  will be returned in the list if an identifier is not found.

  See IDENID for acceptable combinations of context and entity type.

  See OUIDEN for further explanation about identifiers.