6. Subject

Obligation: Recommended

Occurrences: 0-n

Definition: Subject, keyword, classification code, or key phrase describing the resource.

Allowed values, examples, other constraints:

Free text.

Sub-properties:

Example XML

<subjects>
  <subject xml:lang="en" subjectScheme="Library of Congress Subject Headings (LCSH)" schemeURI="https://id.loc.gov/authorities/subjects.html" valueURI="https://id.loc.gov/authorities/subjects/sh2009009655.html">Climate change mitigation</subject>
  <subject xml:lang="en" subjectScheme="ANZSRC Fields of Research" schemeURI="https://www.abs.gov.au/statistics/classifications/australian-and-new-zealand-standard-research-classification-anzsrc" classificationCode="370201">Climate change processes</subject>
</subject>

6.a subjectScheme

Occurrences: 0-1

Definition: The name of the subject scheme or classification code or authority if one is used.

Allowed values, examples, other constraints:

Free text.

Examples:

  • Library of Congress Subject Headings (LCSH)

  • ANZSRC Fields of Research

6.b schemeURI

Occurrences: 0-1

Definition: The URI of the subject identifier scheme.

Allowed values, examples, other constraints:

Example: https://id.loc.gov/authorities/subjects.html

6.c valueURI

Occurrences: 0-1

Definition: The URI of the subject term.

Allowed values, examples, other constraints:

Example: https://id.loc.gov/authorities/subjects/sh85118622.html

6.d classificationCode

Occurrences: 0-1

Definition: The classification code used for the subject term in the subject scheme.

Allowed values, examples, other constraints:

Example: 310607 (where 310607 is the classification code associated with the subject term “Nanobiotechnology” in the ANZSRC Fields of Research subject scheme)

The classificationCode sub-property may be used for subject schemes, like ANZSRC, which do not have valueURIs for each subject term.