| Format / standard | Full name or organisation | Subject or Domain | Notes |
| CDWA | Categories for the Description of Works of Art | Art | Core identifies the minimum information necessary to uniquely and unambiguously identify a particular work of art or museum object. |
| CIMI | CIMI Consortium | Museums | Now defunct but some organisations will have legacy metadata in this format. |
| DDI | Data Documentation Initiative | Social science datasets | Originated in the Inter-university Consortium for Political and Social Research and is now the project of an Alliance of about 25 institutions in North America and Europe. |
| EAD | Encoded Archival Description | Archival | Used to encode/mark up finding aids in archives. Retains/reflects the arrangement/structure/provenance of archival resources. |
| IEEE-LOM | IEEE Learning Objects Metadata | Educational | Good for recording the level at which a resource is pitched and the use/audience for which it is designed. |
| MARC | Machine Readable Cataloguing: including MARC21 USMARC UKMARC UNIMARC | Library | Bibliographic. The tagging structure within which AACR2 rules are normally applied. Developed initially for books/journals but used for all types of library resources physical and digital. |
| MODS | Metadata Object Description Schema | Bibliographic | XML schema primarily for library resources which is easier to use than MARC but allows for richer description than Dublin Core. |
| MPEG7 & MPEG21 | Moving Picture Experts Group | Audio-visual | A family of standards used for coding audio-visual information (e.g. movies video music) in a digital compressed format. |
| Qualified DC | Qualified Dublin Core | All | Emphasis on interoperability between resources from all domains subjects and resource types whether physical or digital. |
| RSLP Collection Level Description | UKOLN | Collections | Interoperable method for describing digital and/or traditional collections from libraries/archives/museums. |
| Simple DC | Simple Dublin Core | All | Emphasis on interoperability between resources from all domains subjects and resource types whether physical or digital. |
| SPECTRUM/MDA | MDA | Museums | "The museum documentatioin standard. Spectrum documents objects and the processes they undergo as well as identifying and describing the information which needs to be recorded to support the procedures. " |
| TEI header | Text Encoding Initiative | Digital text | An XML or SGML-encoded bibliographic record that is attached to and forms a part of the digital text itself. |
| VRA Core 3.0 | Visual Resources Association Core 3.0 | Art images | A single element set that can be repeated to describe in a single over-arching structure original works of visual art and also images of them. |
| AACR2 | Anglo-American Cataloguing Rules | Library/bibliographic | The rules for the description of and the provision of access points for all library materials. |
| ABC Harmony | | All | Entirely developmental/conceptual model for cross-domain interoperability and to record the lifecycle/recycling of complext digital resources. |
| AMICO | Art Museum Image Consortium | Art images | The specification of the AMICO Library a growing online collection of high-quality digital documentation of works of art from around the world. Based on the CDWA. |
| CIDOC | International Committee for Documentation of the International Council of Museums | Museums and archives | A conceptual reference model providing definitions and a formal structure for describing implicit/explicit concepts/relationships used in cultural heritage documentation. |
| EPICS/ONIX | | Book industry | Schema used by publishers to describe their book and other resources electronically to data aggregators wholesalers booksellers and anyone else involved in the sale of their publications. |
| FRBR | Functional Requirements for Bibliograrphic Records | Library | Developmental. Records relationships between bibliogrpahic works manifestations versions etc. |
| IAFA/ROADS | Resource Organisation and Discovery in Subject-based Services | All | Developmental project co-ordinated by UKOLN that developed a metadata format for cross-subject interoperability but the project is now defunct. |
| IMS | IMS Global Learning Consortium Inc. | Education | Specifications for describing interoperable learning packages. |
| INDECS | Interoperability of Data in E-Commerce | E-commerce | Intellectual property (IP) and rights. |
| ISAD(G) | General International Standard Archival Description | Archival | Rules for the description of archival resources. |
| MAD3 | Manual for Archival Description 3rd ed. | Archival | Rule for describing archival resources. |
| Object ID | | Art and antiquities | "An international standard for describing art antiques and antiquities to help combat theft." |
| P/META | | Audiovisual | Used for information exchange by the TV and broadcast media. |
| PICS | Platform for Internet Content Selection | Internet content | Labelling/rating internet content e.g. to control what children can access. |
| SMPTE | | Audiovisual | Used for information exchange by the TV and broadcast media. |
| SOIF | Summary Object Interchange Format | Web objects | The attribute-value pair record format which Harvest Brokers use to exchange Harvest content summaries. |