Extension for db:table-filter

Extension proposal for <db:table-filter> element: What if we want to exclude a group of tables? For example, I'd like to have such possibility to hide "KexiDB system" table (defined by "kexi__" name prefix).

<define name="db-table-filter-pattern">
 <element name="db:table-filter-pattern">
   <ref name="db-table-filter-pattern-attlist"/>
   <ref name="string"/>
 </element>
</define>

A specification fragment for this extension follows... (new elements are marked as bold)

Table Filer Pattern Exclude

The db:table-filter-pattern-exclude attribute indicates that table names matching a table filter pattern defined by db-table-filter-pattern element should be excluded.

<define name="db-table-filter-pattern-attlist" combine="interleave">
  <optional>
  <attribute name="db:table-filter-pattern-exclude" a:defaultValue="false">
   <ref name="boolean"/>
  </attribute>
  </optional>
</define>