4 pr_pushs, pushs, iterated push
5 pr_nexts, nexts, iterated next
6 pr_tls, tls, iterated tail
8 pr_uni, uni, uniform relocations
9 pr_basic, basic relocation
12 pr_isi, isi, isid, test for identity
13 pr_isu, isuni, test for uniform relocations
14 pr_fcla, fcla, finite colength assignment, finite colength
15 pr_isf, isf, isfin, test for finite colength
20 pr_sle, sle, inclusion