command eb for example-based grammar conversion; see 'help eb' and the example in examples/animals/QuestionsI.gfe

examples/animals/Animals.gf

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+-- The Question grammar specialized to animals.
+
+abstract Animals = Questions ** {
+
+  flags startcat=Phrase ;
+
+  fun
+    -- a lexicon of animals and actions among them
+    Dog, Cat, Mouse, Lion, Zebra : Entity ;
+    Chase, Eat, See : Action ;
+}
+

examples/animals/AnimalsEng.gf

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+--# -path=.:present:prelude
+--resource/english:resource/abstract:resource/../prelude
+
+concrete AnimalsEng of Animals = QuestionsEng **
+  open LangEng, ParadigmsEng, IrregEng in {
+
+  lin
+    Dog = regN "dog" ;
+    Cat = regN "cat" ;
+    Mouse = mk2N "mouse" "mice" ;
+    Lion = regN "lion" ;
+    Zebra = regN "zebra" ;
+    Chase = dirV2 (regV "chase") ;
+    Eat = dirV2 eat_V ;
+    See = dirV2 see_V ;
+}

examples/animals/AnimalsFre.gf

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+--# -path=.:present:prelude
+
+concrete AnimalsFre of Animals = QuestionsFre **
+  open LangFre, ParadigmsFre, IrregFre in {
+
+  lin
+    Dog   = regN "chien" ;
+    Cat   = regN "chat" ;
+    Mouse = regGenN "souris" feminine ;
+    Lion  = regN "lion" ;
+    Zebra = regGenN "zèbre" masculine ;
+    Chase = dirV2 (regV "chasser") ;
+    Eat   = dirV2 (regV "manger") ;
+    See   = voir_V2 ;
+}

examples/animals/AnimalsSwe.gf

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+--# -path=.:present:prelude
+
+concrete AnimalsSwe of Animals = QuestionsSwe **
+  open LangSwe, ParadigmsSwe, IrregSwe in {
+
+  lin
+    Dog = regN "hund" ;
+    Cat = mk2N "katt" "katter" ;
+    Mouse = mkN "mus" "musen" "möss" "mössen" ;
+    Lion = mk2N "lejon" "lejon" ;
+    Zebra = regN "zebra" ;
+    Chase = dirV2 (regV "jaga") ;
+    Eat = dirV2 äta_V ;
+    See = dirV2 se_V ;
+}

examples/animals/Questions.gf

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+-- Simple questions and answers, in present tense.
+
+abstract Questions = {
+  cat 
+    Phrase ; Entity ; Action ;
+  fun
+    Who    : Action -> Entity -> Phrase ;           -- who chases X
+    Whom   : Entity -> Action -> Phrase ;           -- whom does X chase
+    Answer : Entity -> Action -> Entity -> Phrase ; -- X chases Y
+}

examples/animals/QuestionsEng.gf

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+concrete QuestionsEng of Questions = QuestionsI with 
+  (Lang = LangEng) ;

examples/animals/QuestionsFre.gf

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+concrete QuestionsFre of Questions = QuestionsI with 
+  (Lang = LangFre) ;

examples/animals/QuestionsI.gf

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+-- to compile: echo "eb -file=QuestionsI.gfe" | gf $GF_LIB_PATH/present/LangEng.gfo
+-- or use directly gf <mkAnimals.gfs
+
+incomplete concrete QuestionsI of Questions = open Lang in {
+  lincat
+    Phrase = Utt ;
+    Entity = N ;
+    Action = V2 ;
+
+  lin 
+    Who  love_V2 man_N           = (
+UttQS (UseQCl (TTAnt TPres ASimul) PPos (QuestVP whoSg_IP (ComplSlash (SlashV2a love_V2) (DetCN (DetQuant IndefArt NumPl) (UseN man_N)))))
+)
+ ;
+    Whom man_N love_V2           = (
+UttQS (UseQCl (TTAnt TPres ASimul) PPos (QuestSlash whoPl_IP (SlashVP (DetCN (DetQuant DefArt NumSg) (UseN man_N)) (SlashV2a love_V2))))
+  --- UttQS (UseQCl (TTAnt TPres ASimul) PPos (QuestSlash whoSg_IP (SlashVP (DetCN (DetQuant DefArt NumSg) (UseN man_N)) (SlashV2a love_V2))))
+)
+ ;
+    Answer woman_N love_V2 man_N = (
+UttNP (DetCN (DetQuant DefArt NumSg) (ApposCN (ApposCN (UseN woman_N) (DetCN (DetQuant IndefArt NumPl) (UseN love_N))) (DetCN (DetQuant IndefArt NumPl) (UseN man_N))))
+  --- UttNP (DetCN (DetQuant DefArt NumSg) (ApposCN (UseN woman_N) (DetCN (DetQuant IndefArt NumPl) (ApposCN (UseN love_N) (DetCN (DetQuant IndefArt NumPl) (UseN man_N))))))
+  --- UttS (UseCl (TTAnt TPres ASimul) PPos (PredVP (DetCN (DetQuant DefArt NumSg) (UseN woman_N)) (ComplSlash (SlashV2a love_V2) (DetCN (DetQuant IndefArt NumPl) (UseN man_N)))))
+)
+ ;
+
+}

examples/animals/QuestionsI.gfe

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+-- to compile: echo "eb -file=QuestionsI.gfe" | gf $GF_LIB_PATH/present/LangEng.gfo
+-- or use directly gf <mkAnimals.gfs
+
+incomplete concrete QuestionsI of Questions = open Lang in {
+  lincat
+    Phrase = Utt ;
+    Entity = N ;
+    Action = V2 ;
+
+  lin 
+    Who  love_V2 man_N           = %ex Utt "who loves men" ;
+    Whom man_N love_V2           = %ex Utt "whom does the man love" ;
+    Answer woman_N love_V2 man_N = %ex Utt "the woman loves men" ;
+
+}

examples/animals/QuestionsSwe.gf

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+concrete QuestionsSwe of Questions = QuestionsI with 
+  (Lang = LangSwe) ;