Built-ins Seattle 2006

Built-ins	compare/3	callable/1	forall/2	numbervars/3	retractall/1	sort/2	keysort/2	ground/1	call/N
ALS Prolog 3.1	yes	no	no	yes	no	yes	yes
Amzi! Prolog 6.2.2	yes*	no	no	yes	yes	yes	yes
B-Prolog 6.9	yes	yes	yes	yes	yes	yes	yes	yes	no
CIAO 1.10	yes	yes	no	yes	yes	lib	lib	lib	lib
CxProlog 0.95	no	no	no	yes	yes	yes	yes	yes
ECLiPSe 5.5	yes	no	no	lib	no**	yes	yes
GNU Prolog 1.2.16	yes	yes	no	yes	yes	yes	yes	no
IF/Prolog 5.1	yes	no	no	yes***	yes	yes	no	yes
JIProlog 3.0.2-3	yes	yes	yes	yes	yes	yes	no
K-Prolog 5.1.2a	yes	no	no	no	no	yes	yes
LPA MacProlog32 1.25	yes	yes	yes	yes	yes	yes	yes
LPA WinProlog 4.50	yes	yes	yes	yes	yes	yes	yes
MasterProLog 4.1	yes	no	no	no	yes	yes	yes
Minerva 2.4	no	no	no	no	yes	yes	no
Open Prolog 1.1b5	yes	no	no	yes	no	yes	yes
PrologII+ 4.5	no	no	no	?	yes	yes	yes
Qu-Prolog 6.7	yes	yes	no	no	yes	yes	no	no
Quintus Prolog 3.3	yes	yes	lib	yes	yes	yes	yes	yes
SICStus Prolog 4.0	yes	yes	no	yes	yes	yes	yes	yes	yes
SWI Prolog 5.6.23	yes	yes	yes	yes	yes	yes	yes	yes	yes
XSB 3.0	yes	yes	no	lib	yes	yes	yes	lib	no
YAP 5.1	yes	yes	no	yes	yes	yes	yes	yes

* Returns '==' instead of '='
** There is a retract_all/1 built-in predicate