4 gr_pushs, pushs, iterated push
5 gr_nexts, nexts, iterated next
6 gr_tls, tls, iterated tail
8 gr_uni, uni, uniform relocations
9 gr_basic, basic relocation
12 gr_isi, isi, isid, test for identity
13 gr_isu, isuni, test for uniform relocations
14 gr_fcla, fcla, finite colength assignment, finite colength
15 gr_isf, isf, isfin, test for finite colength
20 gr_sle, sle, inclusion