Suppose you have a Component document "Server" with documents for sub components. Now you need to list all documents of type View that are associated with the component or any of its subordinate documents.

To limit your search to all documents that have the document named "Server" as their ancestor add

$<AncestorNames>=[Server]

to your where clause.

To filter on the doctype View, you need to append another constraint so that the final where clause looks like this:

$<AncestorNames>=[This Root Page] AND Doctype=view

If you need to list the descendants of a document on that document, you can use the AncestorIds property.This is especially helpful for template authors since the ID is unique, whereas the name might not be.

The projectdoc Toolbox adds the page identifier as artificial property. So the where clause for this search looks like this:

$<AncestorIds> = [${Page ID}]