These pages describe the single feature type (OS Open USRN) available for the OS Open USRN product. The attributes associated with the feature type are listed on the following page. The following information is given for each attribute.

Feature type attribution information

Name and definition

The name of the attribute and what it is describing.

Attribute type

The nature of the attribute (for example, a numeric value).

Size

The maximum length of the values in the attribute.

Multiplicity

Describes how many times this element is expected to be populated in the data. An attribute may be optional or mandatory within the OS Open USRN product and this is denoted by:

• '1’ – Mandatory: There must be a value.

• ‘0..1’ – Optional: If populated, a maximum of one attribute will be returned.

OS Open USRN attributes

The following sub-sections provide details about the attributes included with the single feature type (OS Open USRN) in the product:

id

A non-persistent integer which is autogenerated and is required within the OGC GeoPackage format.

• Type: Integer

• Multiplicity: [1]

usrn

Unique Street Reference Number (USRN), a unique and persistent identifier assigned by the Roads or Highway Authority.

• Type: Integer

• Size: 8

• Multiplicity: [1]

street_type

The type of Street assigned by the Roads or Highway Authority.

• Type: Text

• Size: 35

• Multiplicity: [1]

geometry

The aggregated geometry of either matched OS Road Links or the Elementary Street Units.

• Type: Geometry (MultiLineString)

• Multiplicity: [1]