DQ8 (Request for acquiring Instrument Group) is available to confirm the attribute of series.
Also, since [ins_id_s](Trade Code) in DQ124 (Request for acquiring instrument series) and DQ126 (Request for acquiring combination series) is to be set according to Naming Conventions, those queries are available.
For the Naming Conventions, please refer to [7.4.1 Table of Naming Conventions] on [J-GATE3.0_Connectivity_Manual_Commonalities_part_Appendix].