Examples of branch filtering

In this section:

1. Example: Single <ditavalref> on a branch
   A single <ditavalref> element can be used to supply filtering conditions for a branch.
2. Example: Multiple <ditavalref> elements on a branch
   Multiple <ditavalref> elements can be used on a single map branch to create multiple distinct copies of the branch.
3. Example: Single <ditavalref> as a child of <map>
   Using a <ditavalref> element as a direct child of the <map> element is equivalent to setting global filtering conditions for the map.
4. Example: Single <ditavalref> in a reference to a map
   Using a <ditavalref> element in a reference to a map is equivalent to setting filtering conditions for the referenced map.
5. Example: Multiple <ditavalref> elements as children of <map> in a root map
   Using multiple instances of the <ditavalref> element as direct children of the <map> element in a root map is equivalent to setting multiple sets of global filtering conditions for the root map.
6. Example: Multiple <ditavalref> elements in a reference to a map
   Using multiple instances of the <ditavalref> element in a reference to a map is equivalent to referencing that map multiple times, with each reference nesting one of the <ditavalref> elements.
7. Example: <ditavalref> within a branch that already uses <ditavalref>
   When a branch is filtered because a <ditavalref> element is present, another <ditavalref> deeper within that branch can supply additional conditions for a subset of the branch.
8. Example: <ditavalref> error conditions
   It is an error condition when multiple, non-equivalent copies of the same file are created with the same resource name.