Fix typo in documentation for the units enumeration

diff --git a/docbook/relaxng/docbook/src/callouts.rnc b/docbook/relaxng/docbook/src/callouts.rnc
index 4f391fd97bbbc36387b918e99e7f9fa9b1a8688c..224d75eec17638bff64285fcbaf40a4707c27656 100644 (file)
--- a/docbook/relaxng/docbook/src/callouts.rnc
+++ b/docbook/relaxng/docbook/src/callouts.rnc
@@ -63,7 +63,7 @@ db.area.units.enumeration =
 
 db.area.units-enum.attribute =
    [
-      db:refpurpose [ "Identifies the units used in the coords attribute The default units vary according to the type of callout specified: " db:tag [ class="attavlue" "calspair" ] " for graphics and " db:tag [ class="attavlue" "linecolumn" ] " for line-oriented elements." ]
+      db:refpurpose [ "Identifies the units used in the coords attribute The default units vary according to the type of callout specified: " db:tag [ class="attvalue" "calspair" ] " for graphics and " db:tag [ class="attvalue" "linecolumn" ] " for line-oriented elements." ]
    ]
    attribute units { db.area.units.enumeration }?