Every top-level publication in the Crossref system is assigned a unique publication ID. These are used mostly for internal purposes, but may be useful when retrieving data using OAI-PMH or identifying a specific title. For most purposes, publication IDs are always preceded by the publication type (J, B, or S). Non-journal publications are 'B'. This includes books, conference proceedings, standards, reports, dissertations, posted content, and datasets.
Publication IDs may be retrieved via the following:
- OAI-PMH: an OAI-PMH ListSets request will return titles and publication IDs for journals, books, conference proceedings, and series-level data:
J (journal) is the default set, set=B must be specified to retrieve book or conference proceeding titles, S for series-level titles. Sets may be further limited by publisher prefix.
The publication ID is listed within the <setspec> element, after the set and publisher prefix. For example, within the following set, 24 is the publication ID for Journal of Clinical Psychology:
<setName>Journal of Clinical Psychology</setName>
- Browsable title list: this list includes the publication ID next to each title in the search results, select id to reveal the ID.
- UNIXSD metadata: the UNIXSD output format includes the journal-id (J) or book-id (B)