> 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-paths/os-mastermap-highways-network-paths-technical-specification/feature-types/specialdesignation.md).
# SpecialDesignation
Special Designations are statutory and advisory designations that can be applied to protect a highway when street or road works are to be undertaken.
A Special Designation feature will reference back to the Path Network through Network Reference and will reference a Street Feature. Features which are a partial reference will provide a Network Reference Location.
Context diagram: SpecialDesignation
## SpecialDesignation attributes
A description applied to a highway to protect it during Street or Road Works.
### **Constraints:**
* If partialRefernce = true then NetworkReferenceLocation shall be expressed.
### id
Unique identifier.
* **Attribute name**: gml\_id (GML), unique\_id (GeoPackage)
* **Type**: CharacterString
* **Size**: 17
* **Multiplicity**: \[1]
### identifier
Uniform Resource Identifier.
* **Attribute name**: identifier (GML), identifier (GeoPackage)
* **Type**: CharacterString
* **Size**: 35
* **Multiplicity**: \[1]
### inspireId
External object identifier of the spatial object.
* **Attribute name**: inspireId
* **Type**: Identifier
* **Multiplicity**: \[0..1]
### beginLifespanVersion
Date and time at which this version of the spatial object was inserted or changed in the spatial data set.
{% hint style="info" %}
The time part is always set to zero.
{% endhint %}
* **Attribute name**: beginLifespanVersion (GML), begin\_lifespan\_version (GeoPackage)
* **Type**: DateTime
* **Multiplicity**: \[1]
### networkRef
Spatial reference of the network-related property.
* **Attribute name**: networkRef (GML), network\_ref (GeoPackage)
* **Type**: NetworkReference
* **Multiplicity**: \[1..\*]
### validFrom
The time when the transport property started to exist in the real world.
{% hint style="info" %}
The time part is always set to zero.
{% endhint %}
* **Attribute name**: validFrom (GML), valid\_from (GeoPackage)
* **Type**: DateTime
* **Multiplicity**: \[1]
### validTo
The time from which the transport property no longer exists in the real world.
{% hint style="info" %}
The time part is always set to zero.
{% endhint %}
* **Attribute name**: validTo (GML), valid\_to (GeoPackage)
* **Type**: DateTime
* **Multiplicity**: \[1]
### designation
Type of Special Designation.
* **Attribute name**: designation (GML), designation (GeoPackage)
* **Type**: [SpecialDesignationTypeValue](/os-downloads/products/transport-network-portfolio/os-mastermap-highways-network-fundamentals/os-mastermap-highways-network-code-lists/specialdesignationtypevalue.md)
* **Size**: 30
* **Multiplicity**: \[1]
### description
Additional information describing the special designation.
* **Attribute name**: description (GML), description (GeoPackage)
* **Type**: CharacterString
* **Size**: 50
* **Multiplicity**: \[0..1]
### timeInterval
Time period to which the restriction applies.
* **Attribute name**: startTime (GML), endTime (GML), start\_time (GeoPackage), end\_time (GeoPackage)
* **Type**: [TemporalPropertyType](/os-downloads/products/transport-network-portfolio/os-mastermap-highways-network-routing-and-asset-management-information/os-mastermap-highways-network-routing-and-asset-management-information-technical-specification/data-types/temporalpropertytype.md)
* **Multiplicity**: \[0..1]
### contactAuthority
Highway authority to be contacted for further consultation about the special designation.
* **Attribute name**: contactAuthority (GML), contact\_authority (GeoPackage)
* **Type**: [ResponsibleAuthority](/os-downloads/products/transport-network-portfolio/os-mastermap-highways-network-paths/os-mastermap-highways-network-paths-technical-specification/structured-data-types/responsibleauthority.md)
* **Multiplicity**: \[0..1]
### partialReference
Flag to indicate that the maintenance feature partially references a Street.
* **Attribute name**: partialReference (GML), partial\_reference (GeoPackage)
* **Type**: Boolean
* **Size**: 5
* **Multiplicity**: \[1]
### reasonForChange
The reason for a change made to a feature.
* **Attribute name**: reasonForChange (GML), reason\_for\_change (GeoPackage)
* **Type**: [ChangeValue](/os-downloads/products/transport-network-portfolio/os-mastermap-highways-network-fundamentals/os-mastermap-highways-network-code-lists/changevalue.md)
* **Size**: 32
* **Multiplicity**: \[1]
---
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