Subreadings in Constraint Grammar

Current situation

Typical input with sub-readings:

^foobar/foo+bar/fubar/flue+barge$

Right now, only the last sub-reading is used, in the above example, vislcg3 treats it as if it were

^foobar/bar/fubar/barge$

This works great for compounds where the stuff before the + is mostly inconsequential, while for other multiword expressions it is not so good... (Also, mapping tags are only put on the last sub-reading now.)

Wait can't we just split on the + with pretransfer before sending this to cg-proc?

No, because we first have to disambiguate between eg. ^foobar/foo+bar/fubar/flue+barge$ (what would that even look like if split? wouldn't work)

What we need

• We may need to refer to an earlier sub-reading in order to disambiguate
• We may want to put a mapping tag on an earlier sub-reading
• And of course we want to be able to refer to the last as in the current situation

Referring to the final sub-reading

Northern Sámi postpositions take genitive. Possible input fragment:

^soahtefámu/soahti<N><Sg><Nom><Cmp>+fápmu<N><Sg><Acc>/soahti<N><Sg><Nom><Cmp>+fápmu<N><Sg><Gen>$ ^vuostá/vuostá<Po>/vuostá<Pr>/vuostá<N><Sg><Nom>$

Correct output:

^soahtefámu/soahti<N><Sg><Nom><Cmp>+fápmu<N><Sg><Gen><@→P>$ ^vuostá/vuostá<Po><@←ADVL>$^

If the input noun were unambiguously nominative, the Po reading should not be selected, so we might have a rule somewhere with

REMOVE Po if (-1 (Nom))

but if this matched non-final sub-readings, we would get the wrong tagging here. Currently, non-final sub-readings are ignored, so the sme-nob CG's work fine (as do the nn-nb ones for compounding there).

Referring to non-final sub-readings

Possible input:

^D'an/Da<pr>+an<det><def><sp>$ ^emgann/emgann<n><m><sg>$
^ez/e<vpart><obj>/ael<n><m><pl>/mont<vblex><pri><p2><sg>/monet<vblex><pri><p2><sg>/e<pr>+da<det><pos><mf><sp>$
^an/an<det><def><sp>/mont<vblex><pri><p1><sg>/monet<vblex><pri><p1><sg>$

Correct output:

^D'an/Da<pr><@ADVL→>+an<det><def><sp><@→N>$
^emgann/emgann<n><m><sg><@P←>$ ^ez/e<vpart><obj><@Pcle>$
^an/mont<vblex><pri><p1><sg><@+FMAINV>$

Some file

SECTION

SUBSTITUTE ("од") ("од:5") ("од") (-1 (adj));


^помладо/adj<pref><comp>+млад<adj><nt><sg><nom><ind>$ ^од/од<pr>$ ^30/30<num>$^./.<sent>$

MAP (@+FMAINV) TARGET VerbFin ;

^n'eus/ne<adv>+bezañ<vblex><pri><impers><sp>/ne<adv>+kaout<vblex><pri><p1><pl>$ ^kador/kador<n><f><sg>$ ^ebet/ebet<adv>$^./.<sent>$

^D'an/Da<pr>+an<det><def><sp>$ 
^emgann/emgann<n><m><sg>$ 
^ez/e<vpart><obj>/ael<n><m><pl>/mont<vblex><pri><p2><sg>/monet<vblex><pri><p2><sg>/e<pr>+da<det><pos><mf><sp>$ 
^an/an<det><def><sp>/mont<vblex><pri><p1><sg>/monet<vblex><pri><p1><sg>$

Here we want:

^D'an/Da<pr><@ADVL→>+an<det><def><sp><@→N>$              to.the
^emgann/emgann<n><m><sg><@P←>$                           battle
^ez/e<vpart><obj><@Pcle>$                                 
^an/mont<vblex><pri><p1><sg><@+FMAINV>$                  go.i