[Zaf-commit] SF.net SVN: zaf:[9673] trunk/dict/zu/hunspell/zu_aff.py

[<fri...@us...>]

Revision: 9673
          http://zaf.svn.sourceforge.net/zaf/?rev=9673&view=rev
Author:   friedelwolff
Date:     2009-02-24 09:52:02 +0000 (Tue, 24 Feb 2009)

Log Message:
-----------
Apply noun rules as a continuation class for infinitive verbs. This has some consequences, mostly positive. Several are mentioned in comments.

Modified Paths:
--------------
    trunk/dict/zu/hunspell/zu_aff.py

Modified: trunk/dict/zu/hunspell/zu_aff.py
===================================================================
--- trunk/dict/zu/hunspell/zu_aff.py	2009-02-24 09:01:40 UTC (rev 9672)
+++ trunk/dict/zu/hunspell/zu_aff.py	2009-02-24 09:52:02 UTC (rev 9673)
@@ -424,6 +424,9 @@
     locative_sfx = aff.add_group(suffix=True, flag="m")
     # This group will contain rules for locative suffixes
 
+    noun = aff.add_group(suffix=False, flag="N")
+    # This group will contain most prefixes for nouns
+
     for morpheme in subject_morphemes:
         # Indicative short form, present, positive with subject morpheme only
         verb_rules(main_subjects, affix=morpheme, continuation_classes=[past_indicative, question])
@@ -473,7 +476,27 @@
     verb_rules(infixes, affix="sayoku", needaffix=True, morphology="PROG_DISTANT_FUTURE_IND_LONG", continuation_classes=[simple_subjects])
 
     #infinitive
-    verb_rules(infixes, affix="uku", morphology="INFINITIVE", continuation_classes=[locative])
+    verb_rules(infixes, affix="uku", morphology="INFINITIVE", continuation_classes=[locative, noun])
+    # Infinitive forms are by defintion also class 15 nouns, and should
+    # therefore be handled as nouns. Therefore the noun rules are added as a
+    # continuation class. This allows us to recognise forms such as
+    # "nokuthanda", "ngukuthanda", etc.
+    #
+    # Using the noun continuation class is problematic since the it generates
+    # incorrect forms for noun rules with needsaffix=True, since the needed
+    # extra (third) affix is not supported by hunspell. Consequently incorrect
+    # forms like "nakuthanda" is accepted as an infinitive noun with negative
+    # associative copulative, even though it still needed a negative subject
+    # morpheme like "angi-" or "azi-". Luckily "nakuthanda" is a valid word for
+    # another reason ("You(pl) loved it long ago").
+    #
+    # Several correct forms are not recognised, such as "ungukuthanda", since
+    # the 'u-' as third prefix is not supported. These forms shouldn't be too
+    # frequent.
+    #
+    # This can probably be solved by applying some or all of the noun rules
+    # directly to the verb stem along with the infinitive prefix.
+
     #infinitive + -sa- progressive aspectual morpheme
     verb_rules(infixes, affix="ukusa", morphology="INFINITIVE_PROG", continuation_classes=[locative])
     #infinitive, negative
@@ -545,9 +568,6 @@
 
     ###  Nouns  ###
 
-    noun = aff.add_group(suffix=False, flag="N")
-    # This group will contain most prefixes for nouns
-
     for morpheme in possesive_morphemes:
         noun_rules(noun, affix=morpheme, morphology="POSSESSIVE")
 


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