> For the complete documentation index, see [llms.txt](https://docs.os.uk/os-downloads/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-openmap-local/os-openmap-local-technical-specification/feature-types/importantbuilding.md).

# ImportantBuilding

A generalised building that belongs to a FunctionalSite.

<figure><img src="https://1897589978-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcNpJpLP8RROUaWVQo5ea%2Fuploads%2Fc7ALeTd2bGVmFWxnTS74%2Fimage.png?alt=media&amp;token=5d2c1e9b-5082-457d-b9da-4329ad9c69e9" alt="UML class diagram for the FunctionalSite and ImportantBuilding Feature Types."><figcaption><p>UML class diagram for the FunctionalSite and ImportantBuilding Feature Types.</p></figcaption></figure>

## FunctionalSite attributes

### BuildingTheme

A description of the theme that a particular site falls under (that is, air transport, education, medical care and so on.). The valid values are defined in the SiteThemeType Code List.

* **Type:** BuildingTheme
* **Length:** 27
* **Multiplicity:** \[1]

### classification

A description of the actual function of a site (that is, airfield, junior school, hospital and so on.) The valid values are defined in the SiteClassification code list. For sites with multiple functions, the values will be provided together and separated by a ‘,’.

* **Type:** SiteClassification
* **Length:** 90
* **Multiplicity:** \[1]

### distinctiveName

The name of the site (for example, ‘Brighton College’). Note this may be null if the captured value is a house number.

* **Type:** CharacterString
* **Length: 120**
* **Multiplicity:** \[0..1]

### featureCode

A unique feature code to facilitate styling.

* **Type:** Integer
* **Multiplicity:** \[1]

### geometry

Polygon representing the generalised important building.

* **Type:** GM\_Surface
* **Multiplicity:** \[1]

### siteTheme

A description of the theme that a particular site falls under (that is, air transport, education, medical care and so on.). The valid values are defined in the SiteThemeType Code List.

* **Type:** SiteTheme
* **Length: 21**
* **Multiplicity:** \[1]


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