tested and fixed

library/help/database.factor

@@ -62,4 +62,13 @@ TUPLE: term entry ;
 
 M: term article-title term-entry ;
 
-M: term article-content terms get hash ;
+M: term article-content
+    term-entry terms get hash
+    [ "No such glossary entry" ] unless* ;
+
+: add-term ( term element -- ) swap terms get set-hash ;
+
+! Missing topics
+M: f article-title drop "No such topic" ;
+
+M: f article-content drop "No such topic" ;

library/help/help.factor

@@ -1,6 +1,6 @@
 IN: help
-USING: arrays gadgets-presentations io kernel namespaces parser
-sequences words ;
+USING: arrays gadgets-presentations hashtables io kernel
+namespaces parser sequences words ;
 
 : help ( topic -- )
     [
@@ -8,22 +8,20 @@ sequences words ;
         article-content print-element terpri
     ] with-markup ;
 
-: glossary ( name -- )
-    <term> help ;
+: glossary ( name -- ) <term> help ;
 
 : HELP:
-    scan-word
-    [ >array reverse "help" set-word-prop ] ; parsing
+    scan-word [ >array "help" set-word-prop ] [ ] ; parsing
 
 : ARTICLE:
-    [
-        >array reverse [ first2 2 ] keep
-        tail add-article
-    ] ; parsing
+    [ >array [ first2 2 ] keep tail add-article ] [ ] ; parsing
+
+: GLOSSARY:
+    [ >array [ first 1 ] keep tail add-term ] [ ] ; parsing
 
 [ word? ] "Show word documentation" [ help ] define-command
 [ term? ] "Show term definition" [ help ] define-command
 [ link? ] "Show article" [ help ] define-command
 
-H{ } clone articles set
-H{ } clone terms set
+H{ } clone articles global set-hash
+H{ } clone terms global set-hash