Example: Single <ditavalref> as a child of
      <map>
  
  This section is non-normative.
In this scenario, a <ditavalref> element is a direct child of
    the <map> element, which is equivalent to setting global filtering
    conditions for the map.
Example
This section is non-normative.
The following map is equivalent to processing all the contents of the map with the conditions in the novice.ditaval document. If additional conditions are provided externally (for example, as a parameter to the publishing process), those conditions take precedence.
<map>
  <title>Sample map</title>
  <ditavalref href="novice.ditaval"/>
  <!-- lots of content -->
</map>