It only matches attributes in the root element but will not search in any toggled down sub elements.
As an example: in the delivery schema find the contact date. If you toggle down the Delivery scheduling element and search the phrase again it works
with a parameter for the depth.
This is a good idea. We will add this into our backlog and work on this as soon as we have an opportunity. For the moment, this is not prioritized.
As mentioned by Eric above, this is in our backlog.