“Complete ISSN data” is a complete set of bibliographic data elements that constitute a full description for a serial publication in the ISSN Register, plus additional data extracted from authority databases. Depending on the resources, it may include for example:

- Other variant titles,

- Subject,

- Current and earliest Publishers,

- Corporate editor name,

- ISNI,

- Dates of publication,

- Frequency,

- Type of resource,

- Language,

- Coverage by abstracting and indexing databases,

- Related publications,

- Links to external resources.

Complete ISSN data on open access scholarly publications included in ROAD (Directory of Open Access Scholarly Resources) are accessible for free via the Free Access Portal.