1) The document provides guidance on assigning Digital Object Identifiers (DOIs) through DataCite. It discusses initial decisions around what objects to mint DOIs for, DOI construction, metadata requirements, and manual or automatic minting workflows.
2) Maintaining DOIs requires ensuring a correct URL and metadata for each object over the long term (minimum 10 years) and providing open access to landing pages with metadata and object access.
3) The quality of the DOI system relies on objects being cite-worthy, having well described metadata, and the institution committing to long-term storage.