Incorporation of an Existing Identifier into a DOI Name

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Incorporation of an Existing Identifier into a DOI Name

An existing identifier scheme can be included in the DOI syntax.

hmtoggle_arrow1 Purposes

DOI names can incorporate established identifiers (like ISBN, ISAN, ISWC, PII, or any proprietary identifier) to allow integration with existing systems. Use of DOI name allows ready interoperability with existing abstraction identifiers, with associated manifestation identifiers and other metadata; with rights metadata; and builds on what is practical in each sector.

hmtoggle_arrow1 Considerations to be Taken into Account

Where syntax rules permit the incorporation of an existing identifier from another scheme as part of the DOI name, such rules do not form part of ISO 26324 but are documented separately by the registration authority. In such cases, attention is drawn to the following points.

•The same referent shall be denoted by both the DOI name and the included identifier string, to the degree that is necessary to distinguish it as a separate entity within each identifier scheme.

•Within the DOI System itself, the DOI name is an opaque string. No definitive information relating to the other identifier scheme should be inferred from the specific character string used for a DOI name, and the DOI name is not guaranteed to be usable in any non-DOI applications designed for the other identifier scheme.

•Specific syntax rules for the incorporation of an existing identifier from another scheme shall be maintained by the ISO 26324 Registration Authority.

hmtoggle_arrow1 Examples

Examples 1 and 2 show the incorporation of an ISBN and an ISSN into a DOI name. Other agreed syntaxes for integration are also possible. Example 3 shows that the DOI name is not a replacement for the other identifier scheme.

•Example 1
10.978.86123/45678 shows a possible incorporation of an ISBN (978-86-123-4567-8) into a DOI prefix and suffix.

•Example 2
10.1038/issn.1476-4687 shows a DOI suffix using an ISSN.

•Example 3
10.97812345/99990 is a DOI name. It cannot be validly submitted to an ISBN point-of-sale ordering system, or converted to a GS1 bar code for use as an ISBN bar code. It does not conform to the ISBN syntax.
978-12345-99990 is an ISBN. It cannot be validly submitted to a DOI resolution service; it does not conform to the DOI syntax.
However both identifier strings have the same referent.