# ConceptScheme This type is derived from . ## **Properties** ### **Required properties** | Property | Expected Type | Description | | -------- | ------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | @type | [`Text`](https://schema.org/Text) | Must always be present and set to `"@type": "ConceptScheme"` | | @id | [`URL`](https://schema.org/URL) |

A unique URI-based identifier for the record.

@id properties are used as identifiers for compatibility with JSON-LD. The value of such a property must always be an absolute URI that provides a stable globally unique identifier for the resource, as described in RFC3986.

The primary purpose of the URI format in this context is to provide natural namespacing for the identifier. Hence, the URI itself may not resolve to a valid endpoint, but must use a domain name controlled by the resource owner (the organisation responsible for the OpenActive open data feed).


Example

"@id": ""

| | concept | Array of [`Concept`](https://developer.openactive.io/data-model/types/concept) |

A collection of concepts that are part of this scheme


Example

"concept": \[
{
"@id": "",
"type": "Concept",
"prefLabel": "Martial Arts",
"inScheme": "",
"narrower": ""
}
]

| | title | [`Text`](https://schema.org/Text) |

The title of the scheme


Example

"title": "Activity List"

| | url | [`URL`](https://schema.org/URL) |

A URL to a web page (or section of a page) that describes the concept scheme.


Example

"url": ""

| ### **Recommended properties** | Property | Expected Type | Description | | ----------- | --------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | description | [`Text`](https://schema.org/Text) |

A plain text description of the taxonomy, which must not include HTML or other markup.


Example

"description": "An example activity list."

| | license | [`URL`](https://schema.org/URL) |

Reference to the license under which the activity list has been published.


Example

"license": ""

| Except as otherwise noted, the content of this page is licensed under the [Creative Commons Attribution License (CC-BY V4.0)](https://creativecommons.org/licenses/by/4.0/), and code samples are licensed under the [MIT License](https://opensource.org/licenses/MIT), for anyone to access, use and share; using attribution "[OpenActive](https://www.openactive.io/)".