richer extraction syntax

lib/resource/exper/abstract/Grammar.gf

@@ -0,0 +1,22 @@
+--1 Grammar: the Main Module of the Resource Grammar
+
+-- This grammar is a collection of the different grammar modules,
+-- To test the resource, import [``Lang`` Lang.html], which also contains
+-- a lexicon.
+
+abstract Grammar = 
+  Noun,
+  Verb, 
+  Adjective,
+  Adverb,
+  Numeral,
+  Sentence, 
+  Question,
+  Relative,
+  Conjunction,
+  Phrase,
+  Text,
+  Structural,
+  Idiom ;
+
+