CRX path to use in DDX?

When doing DDX, what is the path to use to pull a PDF or XDP file from the CRX repository?

I know the path to use if the file is in a folder on the server.

If I load a PDF or XDP via the AEM Forms UI under Assets, what path do I use to retrieve it via the DDX?

<DDX xmlns="http://ns.adobe.com/DDX/1.0/">
<PDF result="result">
<XDP>
<XDP source="file:////adobe/xdps/eForms/EMED-48-07-TEST.xdp"/>
</XDP>
<PDF source="file:////adobe/DocumentStorage/eforms_static/dev/45098.pdf"/>
<NoForms/>
</PDF>
</DDX>