Property: modified
The date, or date and time, on which the content of an information resource is changed.
URI: dct:modified
Obligation and Cardinality
The table below details the classes which use this property and the conditions of its use.
| Class | Range | Obligation | Cardinality |
|---|---|---|---|
| CataloguedResource | Date | Mandatory | One |
| Distribution | Date | Recommended | One |
| DataService | Date | Mandatory | One |
| Dataset | Date | Mandatory | One |
Usage Notes
Purpose
The use of modified:
-
Helps users assess the relevance of the content to their information needs.
-
Helps users distinguish when the content of an information resource was changed after it was initially issued.
-
Provides evidence of accountability and quality control by tracking revisions to the content of an information resource.
Do not confuse with
- METADATA RECORD UPDATE DATE: the date, or date and time, on which a catalogue record is changed.
Guidelines
The DATE MODIFIED refers to the last date on which the content of an information resource revised. The date of the most recent update is the only date retained.
Be as specific as possible, including month and day as well as year, if known.
In the case of records which describe an information resource with more than one item (file), such as serial resources or resources with more than one part (eg. book chapters), the DATE MODIFIED should reflect the most recent date that any one item was modified. For example, if a new issue of a serial is added to a record, the DATE MODIFIED should be the date that the new issue was modified.
For most publications and many other information resources in the Government Data Catalogue, the DATE CREATED and DATE MODIFIED will be the same and will likely remain the same.
TODOs
- Update distinctFrom to include all date properties
- Refresh guidance to reflect updated thinking around marketplace
Identifier and Mapping Information
Schema Source
- from schema: https://github.com/co-cddo/ukgov-metadata-exchange-model/blob/main/src/model/uk_cross_government_metadata_exchange_model.yaml