Data items in the MA_RESTRAINTS category provides the list of the different types of spatial restraints used in the modeling.
loop_ _ma_restraints.restraint_id _ma_restraints.data_id _ma_restraints.name _ma_restraints.restraint_type _ma_restraints.details 1 1 . "distance restraints" . 2 2 . "dihedral restraints" . # ... abbreviated ...