# OS MasterMap Topography Layer Downloads

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### Product download

This page provides downloadable files to support the product in use. To download the product itself, please visit the [OS Data Hub](https://osdatahub.os.uk/data).
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## OS MasterMap – Real-World Object catalogue

A catalogue listing the real-world objects (RWOs) present in OS MasterMap data and the features and attributes associated with them is available as a PDF download below.

{% file src="/files/zUcfiEZ4a2WPruuWp2IZ" %}

## Stylesheets

Predefined stylesheets for OS MasterMap Topography Layer are available for download from the [OS MasterMap Topography Layer Stylesheets GitHub repository](https://github.com/OrdnanceSurvey/OSMM-Topography-Layer-stylesheets). To download a ZIP containing all stylesheets, navigate to *Code* > *Download ZIP*.

## OS MasterMap XML schema

The OS MasterMap XML schema is available from the [application schemas page on the Ordnance Survey website](https://www.ordnancesurvey.co.uk/xml/schema/v9/index.html). Previous versions of this schema are available to download from the website, the most recent version is included below:

### OS MasterMap XML schema, version 9

* [OSAerialMetadata.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSAerialMetadata.xsd)
* [OSComplexTypes.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSComplexTypes.xsd)
* [OSDNFFeatures.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSDNFFeatures.xsd)
* [OSGeometryTopology.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSGeometryTopology.xsd)
* [OSImageMetadata.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSImageMetadata.xsd)
* [OSMeasures.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSMeasures.xsd)
* [OSOrthoMetadata.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSOrthoMetadata.xsd)
* [OSQueryResult.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSQueryResult.xsd)
* [OSSimpleTypes.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSSimpleTypes.xsd)
* [OSIMIngestionMetadata.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSIMIngestionMetadata.xsd)
* [OSIMProductMetadata.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSIMProductMetadata.xsd)
* [OSIMSupplierMetadata.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/OSIMSupplierMetadata.xsd)

### OpenGIS Consortium schemas

* [feature.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/feature.xsd)
* [geometry.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/geometry.xsd)
* [gml.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/gml.xsd)
* [GML 2.1.2 implementation specification](http://www.opengeospatial.org/docs/02-069.pdf)

### W3C schemas

* [xml.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/xml.xsd)
* [xlink.xsd](https://www.ordnancesurvey.co.uk/xml/schema/v9/xlink.xsd)

{% hint style="info" %}
The XML File Repository License, covering the terms and conditions for the use of all Ordnance Survey XML schemas, is made available through the [Terms and Conditions page](/os-downloads/resources/site-resources/terms-and-conditions.md) in the Resources section.
{% endhint %}


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