Vernac classification streamlined (handles VERNAC EXTEND)

The warning output by vernacextend when the classifier is missing
is the documentation of this commit:

Warning: Vernac entry "Foo" misses a classifier. A classifier is a
function that returns an expression of type vernac_classification (see
Vernacexpr). You can:
- Use '... EXTEND Foo CLASSIFIED AS QUERY ...' if the new
  vernacular command does not alter the system state;
- Use '... EXTEND Foo CLASSIFIED AS SIDEFF ...' if the new
  vernacular command alters the system state but not the parser nor it starts
  a proof or ends one;
- Use '... EXTEND Foo CLASSIFIED BY f ...' to specify a global
  function f.  The function f will be called passing "Foo" as the
  only argument;
- Add a specific classifier in each clause using the syntax:
  '[...] => [ f ] -> [...]'.
Specific classifiers have precedence over global classifiers. Only one
classifier is called.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16680 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 1 insertions, 1 deletions

diff --git a/plugins/xml/xmlentries.ml4 b/plugins/xml/xmlentries.ml4
index 5ca6e155b..8cf3a0bdc 100644
--- a/plugins/xml/xmlentries.ml4
+++ b/plugins/xml/xmlentries.ml4
@@ -25,7 +25,7 @@ END
 
 (* Print XML and Show XML *)
 
-VERNAC COMMAND EXTEND Xml
+VERNAC COMMAND EXTEND Xml CLASSIFIED AS QUERY
 | [ "Print" "XML" filename(fn) global(qid) ] -> [ Xmlcommand.print_ref qid fn ]
 
 | [ "Show" "XML" filename(fn) "Proof" ] -> [ Xmlcommand.show fn ]