comments in phrasebook abstract syntax

examples/phrasebook/phrasebook.html

@@ -92,6 +92,13 @@ Quasi-incremental translation: many basic types are also used as phrases.
 <P>
 Disambiguation, esp. of politeness distinctions.
 </P>
+<H1>Ontology</H1>
+<P>
+The abstract syntax defines the <B>ontology</B> behind the phrasebook. The ontology
+consists of the following <B>categories</B>. Some explanations can be found in the
+abstract syntax file
+<A HREF="http://code.haskell.org/gf/examples/phrasebook/Sentences.gf"><CODE>Sentences.gf</CODE></A>.
+</P>
 <H1>Files</H1>
 <P>
 <CODE>Sentences</CODE>: general syntactic structures implementable in a uniform way. 
@@ -117,7 +124,7 @@ Separate concrete syntaxes.
 the input language is ambiguous.
 </P>
 <P>
-Here is the module structure produced by
+Here is the module structure as produced by
 </P>
 <PRE>
     &gt; i -retain DisambPhrasebookEng.gf