Further to OSLC + POXProfile post, RPE 2.1 with CLM 6.0.2 simplifies the data source configuration; especially while configuring dynamic data source for traceability reports.
Watch video, created by Dragos, on requirement (DNG) to use case design (DM) traceability document generation using Permanent / OSLC links from DNG and DM without having to go through building Rest URL.
See jazz wiki for Plain Old XML (POX) profile.
Take a look at RPE documentation on creating traceability document from CLM 6.0.2 and RPE 2.1 using POX Profile.
Data source configuration
Use the permanent link from DM, DNG, QM along with POX Profile header without having to convert the link to Reportable Rest API link.
Dynamic data source configuration
URL manipulation or additional server request are no longer required for some of the scenarios as mentioned in OSLC + POXProfile.
There is no need to go through REST schema discover for scenarios like DM usecase design and other artifacts. Use the permanent link as it is along with POX header.