> 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/transport-network-portfolio/os-mastermap-highways-network-fundamentals/os-mastermap-highways-network-getting-started-guide/relationships-between-highways-tables.md).

# Relationships between Highways tables

#### Relationships between Highways tables.

<table data-full-width="true"><thead><tr><th width="197">Table</th><th width="148">Specification</th><th width="178">GML file</th><th>Contains geometry</th><th width="174">Column ID Primary</th><th width="136">Relates to</th><th width="346">Column ID ForeignD Foreign</th></tr></thead><tbody><tr><td>RoadLink</td><td>Linear Network</td><td>RoadLink</td><td>Y</td><td>TOID</td><td>N/A</td><td>N/A</td></tr><tr><td>RoadLinkAlternativeIdentifier</td><td>Linear Network</td><td>RoadLink</td><td>N</td><td>TOID (id in GML/technical spec)</td><td>RoadLink</td><td>TOID</td></tr><tr><td>RoadLinkFormsPartOf</td><td>Linear Network</td><td>RoadLink</td><td>N</td><td>TOID</td><td>Road or Street</td><td>formsPartOf - Will be either Road TOID or Street USRN</td></tr><tr><td>RoadLink_TopoTOIDRef</td><td>Linear Network</td><td>RoadLink</td><td>N</td><td>TOID</td><td>Topo Area</td><td>RelatedRoadAreaTOID - Will be the TOID of the Topo area(s) that represent the RoadLink</td></tr><tr><td>AccessRestriction_NetworkRef</td><td>Routing and Asset Management Information</td><td>AccessRestriction</td><td>N</td><td>TOID</td><td>RoadLink</td><td>RoadLink_TOID - The TOID in the RoadLink table</td></tr><tr><td>AccessRestriction</td><td>Routing and Asset Management Information</td><td>AccessRestriction</td><td>N</td><td>TOID</td><td>AccessRestriction_NetworkRef, AccessRestriction_Inclusion, AccessRestriction_Exemption</td><td>TOID</td></tr><tr><td>AccessRestriction_Inclusion</td><td>Routing and Asset Management Information</td><td>AccessRestriction</td><td>N</td><td>TOID</td><td>AccessRestriction</td><td>TOID</td></tr><tr><td>AccessRestriction_Exemption</td><td>Routing and Asset Management Information</td><td>AccessRestriction</td><td>N</td><td>TOID</td><td>AccessRestriction</td><td>TOID</td></tr><tr><td>Hazard_NetworkRef</td><td>Routing and Asset Management Information</td><td>Hazard</td><td>Y</td><td>TOID</td><td>RoadLink and RoadNode</td><td>RoadLink_TOID and RoadNode _TOID - The TOID in the respective tables</td></tr><tr><td>Hazard</td><td>Routing and Asset Management Information</td><td>Hazard</td><td>Y</td><td>TOID</td><td>Hazard_NetworkRef</td><td>TOID</td></tr><tr><td>Hazard_NodeReference_LinkReference</td><td>Routing and Asset Management Information</td><td>Hazard</td><td>N</td><td>TOID</td><td>RoadLink</td><td>RoadLink_TOID</td></tr><tr><td>RestrictionForVehicles_NetworkRef</td><td>Routing and Asset Management Information</td><td>VehicleRestriction, RestrictionForVehicles</td><td>N</td><td>TOID</td><td>RoadLink and RoadNode</td><td>RoadLink_TOID and RoadNode _TOID - The TOID in the respective tables</td></tr><tr><td>RestrictionForVehicles</td><td>Routing and Asset Management Information</td><td>VehicleRestriction, RestrictionForVehicles</td><td>Y</td><td>TOID</td><td>RestrictionForVehicles_NetworkRef</td><td>TOID</td></tr><tr><td>RestrictionForVehicles_NodeReference_LinkReference</td><td>Routing and Asset Management Information</td><td>VehicleRestriction, RestrictionForVehicles</td><td>N</td><td>TOID</td><td>RoadLink</td><td>RoadLinkTOID</td></tr><tr><td>Road</td><td>Linear Network</td><td>Road</td><td>N</td><td>TOID</td><td>Road_NetworkRef</td><td>TOID</td></tr><tr><td>Road_NetworkRef</td><td>Linear Network</td><td>Road</td><td>N</td><td>TOID</td><td>RoadLink</td><td>RoadLink_TOID - Is the TOID of the RoadLink table</td></tr><tr><td>RoadNode</td><td>Linear Network</td><td>RoadNode</td><td>Y</td><td>TOID</td><td>N/A</td><td>N/A</td></tr><tr><td>RoadNode_RelatedRoadArea</td><td>Linear Network</td><td>RoadNode</td><td>N</td><td>TOID</td><td>Topo Area</td><td>RelatedRoadAreaTOID - Will be the TOID of the Topo area(s) that represent the RoadNode</td></tr><tr><td>Street_NetworkRef</td><td>Linear Network</td><td>Street</td><td>N</td><td>USRN</td><td>RoadLink</td><td>RoadLink_TOID - Will be the TOID of the RoadLink table</td></tr><tr><td>Street</td><td>Linear Network</td><td>Street</td><td>N</td><td>USRN</td><td>Street_NetworkRef</td><td>USRN</td></tr><tr><td>Structure_NetworkRef</td><td>Routing and Asset Management Information</td><td>Structure</td><td>N</td><td>TOID</td><td>RoadLink and RoadNode</td><td>RoadLink_TOID and RoadNode _TOID - The TOID in the respective tables</td></tr><tr><td>Structure</td><td>Routing and Asset Management Information</td><td>Structure</td><td>Y</td><td>TOID</td><td>Structure_NetworkRef</td><td>TOID</td></tr><tr><td>Structure_NodeReference_LinkReference</td><td>Routing and Asset Management Information</td><td>Structure</td><td>N</td><td>TOID</td><td>RoadLink</td><td>RoadLink_TOID</td></tr><tr><td>TurnRestriction_NetworkRef</td><td>Routing and Asset Management Information</td><td>TurnRestriction</td><td>N</td><td>TOID</td><td>RoadLink</td><td>RoadLink_TOID - The TOID in the RoadLink table</td></tr><tr><td>TurnRestriction</td><td>Routing and Asset Management Information</td><td>TurnRestriction</td><td>N</td><td>TOID</td><td>TurnRestriction_NetworkRef, TurnRestriction_Exemption, TurnRestriction_Inclusion</td><td>TOID</td></tr><tr><td>TurnRestriction_Exemption</td><td>Routing and Asset Management Information</td><td>TurnRestriction</td><td>N</td><td>TOID</td><td>TurnRestriction</td><td>TOID</td></tr><tr><td>TurnRestriction_Inclusion</td><td>Routing and Asset Management Information</td><td>TurnRestriction</td><td>N</td><td>TOID</td><td>TurnRestriction</td><td>TOID</td></tr><tr><td>Maintenance Point</td><td>Routing and Asset Management Information</td><td>Maintenance</td><td>Y</td><td>ID</td><td>Street</td><td>Reference_To_StreetUSRN - The USRN in the Street table</td></tr><tr><td>Maintenance Line</td><td>Routing and Asset Management Information</td><td>Maintenance</td><td>Y</td><td>ID</td><td>Street</td><td>Reference_To_StreetUSRN - The USRN in the Street table</td></tr><tr><td>Maintenance Area</td><td>Routing and Asset Management Information</td><td>Maintenance</td><td>Y</td><td>ID</td><td>Street</td><td>Reference_To_StreetUSRN - The USRN in the Street table</td></tr><tr><td>Maintenance No Geometry</td><td>Routing and Asset Management Information</td><td>Maintenance</td><td>N</td><td>ID</td><td>Street</td><td>Reference_To_StreetUSRN - The USRN in the Street table</td></tr><tr><td>Reinstatement Point</td><td>Routing and Asset Management Information</td><td>Reinstatement</td><td>Y</td><td>ID</td><td>Street</td><td>Reference_To_StreetUSRN - The USRN in the Street table</td></tr><tr><td>Reinstatement Line</td><td>Routing and Asset Management Information</td><td>Reinstatement</td><td>Y</td><td>ID</td><td>Street</td><td>Reference_To_StreetUSRN - The USRN in the Street table</td></tr><tr><td>Reinstatement Area</td><td>Routing and Asset Management Information</td><td>Reinstatement</td><td>Y</td><td>ID</td><td>Street</td><td>Reference_To_StreetUSRN - The USRN in the Street table</td></tr><tr><td>Reinstatement No Geometry</td><td>Routing and Asset Management Information</td><td>Reinstatement</td><td>Y</td><td>ID</td><td>Street</td><td>Reference_To_StreetUSRN - The USRN in the Street table</td></tr><tr><td>Junction</td><td>Linear Network</td><td>RoadJunction</td><td>N</td><td>TOID</td><td>RoadNode</td><td>TOID, RoadNode_TOIDs (the junction can reference back to multiple road nodes)</td></tr><tr><td>Highways Dedication</td><td>Routing and Asset Management Information</td><td>Dedication</td><td>Y</td><td>ID</td><td>Road, Street or Path</td><td>NetworkRef - TOID in RoadLink and PathLink table and USRN in the Street table</td></tr><tr><td>Special Designation Point</td><td>Routing and Asset Management Information</td><td>SpecialDesignation</td><td>Y</td><td>networkRef</td><td>Street</td><td>NetworkRef - USRN in the Street table</td></tr><tr><td>Special Designation Line</td><td>Routing and Asset Management Information</td><td>SpecialDesignation</td><td>Y</td><td>networkRef</td><td>Street</td><td>NetworkRef - USRN in the Street table</td></tr><tr><td>Special Designation Area</td><td>Routing and Asset Management Information</td><td>SpecialDesignation</td><td>Y</td><td>networkRef</td><td>Street</td><td>NetworkRef - USRN in the Street table</td></tr><tr><td>Special Designation No Geometry</td><td>Routing and Asset Management Information</td><td>SpecialDesignation</td><td>N</td><td>networkRef</td><td>Street</td><td>NetworkRef - USRN in the Street table</td></tr><tr><td>Ferrylink</td><td>Linear Network</td><td>FerryLink</td><td>Y</td><td>TOID</td><td>N/A</td><td>N/A</td></tr><tr><td>Ferrylink</td><td>Linear Network</td><td>FerryLink</td><td>N</td><td>TOID</td><td>FerryNode</td><td>FerryNode_TOID (one for startNode and one for endNode)</td></tr><tr><td>FerryNode</td><td>Linear Network</td><td>FerryNode</td><td>Y</td><td>TOID</td><td>N/A</td><td>N/A</td></tr><tr><td>FerryTerminal</td><td>Linear Network</td><td>FerryTerminal</td><td>N</td><td>refToFuncationalSite,roadNodeRef, pathNodeRef</td><td>Road Node, Path Node and Functional Site</td><td>TOID</td></tr><tr><td>PathLink</td><td>Paths</td><td>PathLink</td><td>Y</td><td>TOID</td><td>N/A</td><td>N/A</td></tr><tr><td>PathLinkAlternativeIdentifier</td><td>Paths</td><td>PathLink</td><td>N</td><td>TOID</td><td>PathLink</td><td>TOID</td></tr><tr><td>PathLinkFormsPartOf</td><td>Paths</td><td>PathLink</td><td>N</td><td>TOID</td><td>Path or Street</td><td>formsPartOf - Will be either Path TOID or Street USRN</td></tr><tr><td>PathLink_TopoTOIDRef</td><td>Paths</td><td>PathLink</td><td>N</td><td>TOID</td><td>Topo Area</td><td>RelatedPathAreaTOID - Will be the TOID of the Topo area(s) that represent the PathLink</td></tr><tr><td>PathLink</td><td>Paths</td><td>PathLink</td><td>N</td><td>TOID</td><td>PathNode</td><td>PathNode_TOID (one for startNode and one for endNode)</td></tr><tr><td>Path</td><td>Paths</td><td>Path</td><td>N</td><td>TOID</td><td>Path_NetworkRef</td><td>TOID</td></tr><tr><td>Path_Ref_PathLink</td><td>Paths</td><td>Path</td><td>N</td><td>TOID</td><td>PathLink</td><td>PathLink_TOID - Is the TOID of the PathLink table</td></tr><tr><td>PathNode</td><td>Paths</td><td>PathNode</td><td>Y</td><td>TOID</td><td>N/A</td><td>N/A</td></tr><tr><td>PathNode_RelatedRoadArea</td><td>Paths</td><td>PathNode</td><td>N</td><td>TOID</td><td>Topo Area</td><td>RelatedPathAreaTOID - Will be the TOID of the Topo area(s) that represent the PathNode</td></tr><tr><td>ConnectingLink</td><td>Paths</td><td>ConnectingLink</td><td>Y</td><td>TOID</td><td>PathNode and ConnectingNode</td><td>TOID</td></tr><tr><td>ConnectingNode</td><td>Paths</td><td>ConnectingNode</td><td>Y</td><td>TOID</td><td>RoadLink</td><td>TOID</td></tr></tbody></table>


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