Crossref metadata
- Metadata and content type overview
- Relationships between DOIs and other objects
- Authors and editors
- Journals and journal articles
- Journal title management
- Books and book chapters
- Conference proceedings
- Datasets (database)
- Dissertations
- Peer Reviews
- Posted content (includes preprints)
- Reports and Working Papers
- Standards
- Components
- License metadata (Access Indicators)
- NLM / JATS abstracts
- As-crawled URLs
- Article numbers / IDs
- Internal and other identifiers
- Publication IDs