# Concept

This type is derived from <http://www.w3.org/2004/02/skos/core#Concept>.

## **Properties**

### **Required properties**

| Property  | Expected Type                     | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| --------- | --------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| @type     | [`Text`](https://schema.org/Text) | Must always be present and set to `"@type": "Concept"`                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| @id       | [`URL`](https://schema.org/URL)   | <p>The <code>@id</code> of a Concept from the <a href="https://github.com/openactive/activity-list">OpenActive Activity List</a>. This value <a href="https://developer.openactive.io/publishing-data/activity-list-references">must always exactly match</a> an <code>id</code> from the <a href="https://github.com/openactive/activity-list">OpenActive Activity List</a>.</p><p><br>Example</p><p><code>"@id": "<https://openactive.io/activity-list#a454c7e6-52da-426d-9bd1-743e9d7d266d>"</code></p> |
| inScheme  | [`URL`](https://schema.org/URL)   | <p>A stable URL reference for the taxonomy, which must be <code><https://openactive.io/activity-list></code> to <a href="https://developer.openactive.io/publishing-data/activity-list-references">reference the OpenActive Activity List</a>.</p><p><br>Example</p><p><code>"inScheme": "<https://openactive.io/activity-list>"</code></p>                                                                                                                                                                |
| prefLabel | [`Text`](https://schema.org/Text) | <p>A human readable string that minimally describes the Concept, for use in user interfaces.</p><p><br>Example</p><p><code>"prefLabel": "Salsa"</code></p>                                                                                                                                                                                                                                                                                                                                                 |

### **Optional properties**

| Property     | Expected Type                              | Description                                                                                                                                                                                                                 |
| ------------ | ------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| altLabel     | Array of [`Text`](https://schema.org/Text) | <p>An alternative human readable string for use in user interfaces.</p><p><br>Example</p><p><code>"altLabel": \[</code><br>  <code>"Five a side"</code><br><code>]</code></p>                                               |
| broader      | Array of [`URL`](https://schema.org/URL)   | <p>A broader Concept URI</p><p><br>Example</p><p><code>"broader": \[</code><br>  <code>"<https://openactive.io/activity-list#6ca15167-51da-4d91-a1ae-8a45dc47b0ea>"</code><br><code>]</code></p>                            |
| definition   | [`Text`](https://schema.org/Text)          | <p>A human readable string that unambiguously defines the Concept, for use in user interfaces.</p><p><br>Example</p><p><code>"definition": "Latin American style of dance with Cuban origins."</code></p>                   |
| hiddenLabel  | Array of [`Text`](https://schema.org/Text) | <p>An alternative human readable string used to drive autocomplete search matches, that is hidden from the user.</p><p><br>Example</p><p><code>"hiddenLabel": \[</code><br>  <code>"5-a-side"</code><br><code>]</code></p>  |
| narrower     | Array of [`URL`](https://schema.org/URL)   | <p>A more specific concept URI</p><p><br>Example</p><p><code>"narrower": \[</code><br>  <code>"<https://openactive.io/activity-list#b3829f3e-a63e-455f-a51c-1f50ecf85ad5>"</code><br><code>]</code></p>                     |
| notation     | [`Text`](https://schema.org/Text)          | <p>A human-readable identifier for the concept.</p><p><br>Example</p><p><code>"notation": "salsa"</code></p>                                                                                                                |
| related      | Array of [`URL`](https://schema.org/URL)   | <p>A related Concept URI</p><p><br>Example</p><p><code>"related": \[</code><br>  <code>"<https://openactive.io/activity-list#5cdf5ead-e19d-4619-9585-cfe509c3fe52>"</code><br><code>]</code></p>                            |
| topConceptOf | [`URL`](https://schema.org/URL)            | <p>A reference to the Scheme URI, the existence of which indicates that this Concept is at the top level of the hierarchy.</p><p><br>Example</p><p><code>"topConceptOf": "<https://openactive.io/activity-list>"</code></p> |

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