Work on FIXMEs from migration

[olafmersmann]

Here's the list of FIXMEs:

541:# FIXME: "combinatorial" has no direct VariableType; dimensionality "?" unknown.
593:    # FIXME: original "2+" - schema requires set[int]; truncated to 2..10.
616:    # FIXME: original "2+" - truncated to 2..10.
637:# FIXME: implementation unknown.
640:    # FIXME: original "2+" - truncated to 2..10.
663:# FIXME: implementation unknown.
666:    # FIXME: original "2+" - truncated to 2..10.
688:# FIXME: implementation unknown.
691:    # FIXME: original "2+" - truncated to 2..10.
712:# FIXME: implementation unknown.
715:    # FIXME: original "2+" - truncated to 2..10.
736:# FIXME: implementation unknown.
739:    # FIXME: original "2+" - truncated to 2..10.
794:# FIXME: variable type and dimensionality unknown ("?").
825:# FIXME: variable type unknown.
888:# FIXME: "discrete" has no direct VariableType - using integer.
1094:# FIXME: implementation unknown. "ordinal" not representable, using integer+categorical+continuous.
1121:# FIXME: implementation unknown.
1178:    # FIXME: original "scalable" - truncated to 1..10.
1204:    # FIXME: original "scalable" - truncated to 1..10.
1227:# FIXME: "permutations" has no direct VariableType; constraints are implicit permutations.
1231:    # FIXME: original "scalable" - truncated to 1..10.
1254:# FIXME: reference is a title-only string; implementation unavailable; dimensionality unknown.
1286:    # FIXME: original "1+" - truncated to 1..10.
1386:# FIXME: implementation unknown.
1390:    # FIXME: original "2+" - truncated to 2..10.
1410:# FIXME: implementation unknown.
1414:    # FIXME: original "2+" - truncated to 2..10.
1434:# FIXME: implementation unknown.
1438:    # FIXME: original "2+" - truncated to 2..10.
1458:# FIXME: implementation unknown.
1462:    # FIXME: original "2+" - truncated to 2..10.
1484:# FIXME: implementation unknown.
1511:# FIXME: implementation unknown.
1538:# FIXME: implementation unknown.
1565:# FIXME: implementation unknown.
1569:    # FIXME: original "2+" - truncated to 2..10.
1590:# FIXME: implementation unknown.
1594:    # FIXME: original "2+" - truncated to 2..10.
1616:# FIXME: variable type unknown.
1965:# FIXME: no implementation provided.
1991:# FIXME: no implementation provided.
2017:# FIXME: no implementation provided.
2197:# FIXME: "Conditional" variable type has no schema representation; box number expressed as 2 per variable cannot be encoded.
2246:# FIXME: "Ordinal" variable type not in schema; falling back to integer.
2345:# FIXME: "number of constraints: millions" cannot be expressed precisely.
2388:# FIXME: no implementation available.
2419:# FIXME: no public source code; no implementation URL.
2450:# FIXME: bilevel dimensionality (upper 54 / lower 13208) expressed as {54, 13208}; impl not public.
2484:# FIXME: Permutation Constraints not representable in ConstraintType; using multiple Constraint objects.
2651:    # FIXME: original "scalable" - truncated to 1..10.
2680:# FIXME: implementation not found.