systems

Mumbai is a test network tuned for Matic / Polygon. If you don’t find Mumbai as a predefined network in your wallet, you can connect to it manually via Matic’s guide.

Each data asset can have a decentralized identifier (DID) that resolves to a DID document (DDO) for associated metadata. The DDO is essentially JSON filling in metadata fields. For more details on working with OCEAN DIDs check out the DID concept documentation. The DDO Metadata documentation goes into more depth regarding metadata structure.