dcataccessURL

dcat:accessURL, commonly written as dcat:accessURL in the DCAT vocabulary, is a property used to specify the web address through which a dataset distribution can be accessed. In DCAT records, this property links a dcat:Distribution to the resource that provides access to the data, such as a downloadable file, an API endpoint, or a streaming service. The canonical IRI for the property is http://www.w3.org/ns/dcat#accessURL.

Usage and context: dcat:accessURL is typically found on a dcat:Distribution resource that belongs to a dcat:Dataset. It is often used together with other descriptive properties such as dct:title, dct:description, dct:format, and dcat:byteSize. In many DCAT profiles, dcat:downloadURL is also used to indicate a direct data file URL, and dcat:accessURL may be used for general access points or browseable interfaces. When access to data is provided via a service rather than a direct file, dcat:accessURL can point to the service endpoint and can be complemented by dcat:accessService to describe the service.

Rationale and implications: The property serves as an actionable pointer that data portals and catalog users can follow to obtain the distribution. It does not itself carry the data, but identifies the location where the data can be retrieved. Best practices include using stable, persistent URLs and documenting any access requirements (such as authentication or licensing) in accompanying properties.

See also: DCAT, dcat:Distribution, dct:format, dcat:downloadURL, dcat:accessService.