# Code lists

A code list or enumeration is a controlled set of values which can be used to populate a specific column. 

## Code lists used in OS VectorMap District

* [RailwayStationClassification](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification/code-lists/railwaystationclassification)
* [RailwayTrackClassification](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification/code-lists/railwaytrackclassification)
* [RoadClassification](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification/code-lists/roadclassification)
* [RoundaboutClassification](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification/code-lists/roundaboutclassification)
* [DrawLevelValue](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification/code-lists/drawlevelvalue)
* [OverrideValue](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification/code-lists/overridevalue)
* [TidalBoundaryClassification](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification/code-lists/tidalboundaryclassification)
* [FunctionalSiteClassification](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification/code-lists/functionalsiteclassification)
* [NamedPlaceClassification](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification/code-lists/namedplaceclassification)
* [FontHeightClassification](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification/code-lists/fontheightclassification)
* [AdministrativeBoundaryClassification](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-district/os-vectormap-district-technical-specification/code-lists/administrativeboundaryclassification)