The Elastos DID framework is a set of APIs that's compatible with W3C DIDs specs.
Elastos DID runs on the Elastos Identity Chain (EID) and is based on Ethereum chain. It issues DIDs to any device or individual that needs a trust-based system, which is exactly what the SmartWeb is designed for.
JSON-RPC interface is utilized by Elastos to provide parsing methods of DID and verifiable credentials. Elastos defines the interface specification for parsing or querying DID and credential on EID side chain.