This document studies and analyses potential PDL services to enable identity and trust service management. The scope of the work includes objective(s) to analyse and identify required PDL framework services related to aspects such as (i) DID and trust service management; (ii) to support DID for end devices and end-users as applicable; (iii) to achieve controlled transparency to share trust data with service providers; and (iv) to support co-operation with APIs related to public services (e.g., eIDAS framework and EBSI services) and private services.