# AddressBase Plus attribute comparison

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## Royal Mail Address Feature Type

The [Royal Mail Address Feature Type](https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address) (data schema version 1.0) was released 30 September 2025, providing 100% of Royal Mail Postcode Address File (PAF) with point geometry. At the same time the pre-existing OS NGD Address feature types (Built Address, Historic Address, Non-Addressable Object and Pre-Build Address) were also updated to a new data schema version (v3.0).

Prior to this release, Royal Mail PAF data was only available for matched addresses and was supplied in the pre-existing feature types' corresponding Postal Address Related Components.

The [Postal Address](https://docs.os.uk/osngd/data-structure/address/related-components/postal-address) Related Component has therefore been discontinued from the pre-existing feature types' data schema version 3.0, but is still provided against the older (maintenance) data schema versions 1.0 and 2.0.

**However, for complete coverage and ease of use it is recommended to use the new** [**Royal Mail Address Feature Type**](https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address)**.**
{% endhint %}

<table data-full-width="true"><thead><tr><th width="147.8182373046875">AddressBase Attribute</th><th width="135.27276611328125">Code List (AddressBase)</th><th width="224.404052734375">OS NGD Feature Type</th><th width="150.8182373046875">OS NGD Attribute</th><th width="182">Code List (OS NGD)</th><th>Notes</th></tr></thead><tbody><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#uprn">UPRN</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#uprn">uprn</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#udprn">UDPRN</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#udprn">udprn</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#change-type">Change type</a></td><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-fundamentals/code-lists-and-enumerations/changetypecode">ChangeTypeCode</a></td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#changetype">changetype</a></td><td><a href="https://docs.os.uk/osngd/code-lists/code-lists-overview/changetypevalue">changetypevalue</a></td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#state">State</a></td><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-fundamentals/code-lists-and-enumerations/statecode">StateCode</a></td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#buildstatus">buildstatus</a>, <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#addressstatus">addressstatus</a></td><td><a href="https://docs.os.uk/osngd/code-lists/code-lists-overview/buildstatuscode">buildstatusvalue</a>, <a href="https://docs.os.uk/osngd/code-lists/code-lists-overview/addressstatuscode">addressstatusvalue</a></td><td>The AddressBase State has been enhances by splitting into two attributes, <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#buildstatus">buildstatus</a> referring to the ‘physical’ state of the building, and <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#addressstatus">addressstatus</a> referring to address lifecycle stage.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#state-date">State date</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#buildstatusdate">buildstatusdate</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#class">Class</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#classificationcode">classificationcode</a></td><td>N/A</td><td>Attribute serves the same purpose, but is also enhanced with the additional attributes <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#classificationdescription">classificationdescription</a>, <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#primaryclassificationdescription">primaryclassificationdescription</a>, <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#secondaryclassificationdescription">secondaryclassificationdescription</a>, <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#tertiaryclassificationdescription">tertiaryclassificationdescription</a>, and <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#quaternaryclassificationdescription">quaternaryclassificationdescription</a>. Removing the requirement for a separate lookup table.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#parent-uprn">Parent UPRN</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#parentuprn">parentuprn</a></td><td>N/A</td><td>Attribute serves the same purpose but is also enhanced with the additional attributes <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#rootuprn">rootuprn</a> and <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#hierarchylevel">hierarchylevel</a>, which provides the top-level Addressable Object in the parent-child structure and where an address sits in that hierarchy respectively.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#position">Position</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#easting">easting</a>, <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#northing">northing</a></td><td>N/A</td><td>Attributes serve the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#position-lat-long">Position lat long</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#latitude">latitude</a>, <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#longitude">longitude</a></td><td>N/A</td><td>Attributes serve the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#rpc">RPC</a></td><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-fundamentals/code-lists-and-enumerations/rpccode">RPCCode</a></td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#positionalaccuracy">positionalaccuracy</a></td><td><a href="https://docs.os.uk/osngd/code-lists/code-lists-overview/positionalaccuracyvalue">positionalaccuracyvalue</a></td><td>Attribute serves the same purpose. It is now the full description rather than a code.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#local-custodian-code">Local custodian code</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#localcustodiancode">localcustodiancode</a></td><td>N/A</td><td>Attribute serves the same purpose, but is also enhanced with the additional attribute <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#localcustodiandescription">localcustodiandescription</a>, removing the requirement for a separate lookup table.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#country">Country</a></td><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-fundamentals/code-lists-and-enumerations/countrycode">CountryCode</a></td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#country">country</a></td><td><a href="https://docs.os.uk/osngd/code-lists/code-lists-overview/countryvalue">countryvalue</a></td><td>Attribute serves the same purpose. It is now the full name rather than a code.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#la-start-date">LA start date</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#effectivestartdate">effectivestartdate</a></td><td>N/A</td><td>The OS NGD's effective start date is the earliest date between AddressBase's Local Authority start date and entry date.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#last-update-date">Last update date</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#versiondate">versiondate</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#entry-date">Entry date</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#effectivestartdate">effectivestartdate</a></td><td>N/A</td><td>The OS NGD's effective start date is the earliest date between AddressBase's Local Authority start date and entry date.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#rm-organisation-name">RM organisation name</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#organisationname">organisationname</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#la-organisation">LA organisation</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#organisationname">organisationname</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#department-name">Department name</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#departmentname">departmentname</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#legal-name">Legal name</a></td><td>N/A</td><td>N/A</td><td>N/A</td><td>N/A</td><td>Legal name cannot currently be populated by local authorities in England and Wales, and there are no plans for it to be populated. Less than 0.1% of records contain a value for legal name which are all located in Scotland, due to a difference in specification there. There are no plans to increase this population and instead the use of <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#organisationname">organisationname</a> is encouraged.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#sub-building-name">Sub building name</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#subbuildingname">subbuildingname</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#building-name">Building name</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#buildingname">buildingname</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#building-number">Building number</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#buildingnumber">buildingnumber</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#sao-start-number">SAO start number</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#subname">subname</a></td><td>N/A</td><td>The SAO attributes are now combined into the single attribute subname.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#sao-start-suffix">SAO start suffix</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#subname">subname</a></td><td>N/A</td><td>The SAO attributes are now combined into the single attribute subname.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#sao-end-number">SAO end number</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#subname">subname</a></td><td>N/A</td><td>The SAO attributes are now combined into the single attribute subname.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#sao-end-suffix">SAO end suffix</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#subname">subname</a></td><td>N/A</td><td>The SAO attributes are now combined into the single attribute subname.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#sao-text">SAO text</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#subname">subname</a></td><td>N/A</td><td>The SAO attributes are now combined into the single attribute subname.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#alt-language-sao-text">Alt language SAO text</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#alternatelanguagesubname">alternatelanguagesubname</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#pao-start-number">PAO start number</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#number">number</a></td><td>N/A</td><td>The PAO number attributes are now combined into the single attribute number.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#pao-start-suffix">PAO start suffix</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#number">number</a></td><td>N/A</td><td>The PAO number attributes are now combined into the single attribute number.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#pao-end-number">PAO end number</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#number">number</a></td><td>N/A</td><td>The PAO number attributes are now combined into the single attribute number.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#pao-end-suffix">PAO end suffix</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#number">number</a></td><td>N/A</td><td>The PAO number attributes are now combined into the single attribute number.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#pao-text">PAO text</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#name">name</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#alt-language-pao-text">Alt language PAO text</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#alternatelanguagename">alternatelanguagename</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#usrn">USRN</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#usrn">usrn</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#usrn-match-indicator">USRN match indicator</a></td><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-fundamentals/code-lists-and-enumerations/usrnmatchindicatorcode">USRNMatchIndicatorCode</a></td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#usrnmatchindicator">usrnmatchindicator</a></td><td><a href="https://docs.os.uk/osngd/code-lists/code-lists-overview/usrnmatchindicatorcode">usrnmatchindicatorcode</a></td><td>Attribute serves the same purpose. It is now the full description rather than a code.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#area-name">Area name</a></td><td>N/A</td><td>N/A</td><td>N/A</td><td>N/A</td><td>This attribute is used to show the third level of geographic area name. Offical address components will be found within the relevant <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#locality">locality</a> / <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#townname">townname</a> / <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#islandname">islandname</a> attribution</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#level">Level</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#floorlevel">floorlevel</a></td><td>N/A</td><td>Attribute serves the same purpose but is also enhanced with the additional attributes <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#lowestfloorlevel">lowestfloorlevel</a> and <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#highestfloorlevel">highestfloorlevel</a>.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#official-flag">Official flag</a></td><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-fundamentals/code-lists-and-enumerations/officialflagcode">OfficialFlagCode</a></td><td>Built/Historic/Pre-Build Address</td><td>N/A</td><td>N/A</td><td>This attribute is no longer required as the Official Address will always in the main Feature Type (i.e. Built/Historic/Pre-Build Address), alternate addresses are in the held in the <a href="https://docs.os.uk/osngd/data-structure/address/related-components/alternate-address">Alternate Address</a>, Related Component table.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#os-address-toid">OS address TOID</a></td><td>N/A</td><td>N/A</td><td>N/A</td><td>N/A</td><td>This is a legacy cross reference that is no longer populated or maintained.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#os-address-toid-version">OS address TOID version</a></td><td>N/A</td><td>N/A</td><td>N/A</td><td>N/A</td><td>This is a legacy cross reference that is no longer populated or maintained.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#os-road-link-toid">OS road link TOID</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td>Available in the <a href="https://docs.os.uk/osngd/data-structure/address/related-components/related-entity">Related Entity</a>, Related Component table</td><td>N/A</td><td>Information is now provided in a cross-reference table. Not only is the OSMM Road Link TOID provided but also the new OS NGD Road Link (along with other OS NGD related feature types)</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#os-road-link-toid-version">OS road link TOID version</a></td><td>N/A</td><td>N/A</td><td>N/A</td><td>N/A</td><td>The TOID version attribute is no longer supplied as the latest version of TOID is always included.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#os-topo-toid">OS topo TOID</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td>Available in the <a href="https://docs.os.uk/osngd/data-structure/address/related-components/related-entity">Related Entity</a>, Related Component table</td><td>N/A</td><td>Information is now provided in a cross-reference table. Not only is the OSMM Topographic Area TOID provided but also the new equivalent OS NGD feature types.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#os-topo-toid-version">OS topo TOID version</a></td><td>N/A</td><td>N/A</td><td>N/A</td><td>N/A</td><td>The TOID version attribute is no longer supplied as the latest version of TOID is always included.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#voa-ct-record">VOA CT record</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td>Available in the <a href="https://docs.os.uk/osngd/data-structure/address/related-components/other-classification">Other Classification</a>, Related Component table</td><td>N/A</td><td>Information is now provided in a cross-reference table as 'VOA Council Tax'.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#voa-ndr-record">VOA NDR record</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td>Available in the <a href="https://docs.os.uk/osngd/data-structure/address/related-components/other-classification">Other Classification</a>, Related Component table</td><td>N/A</td><td>Information is now provided in a cross-reference table as 'VOA Non Domestic Rates'.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#street-description">Street description</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#streetname">streetname</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#alt-language-street-description">Alt language street description</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#alternatelanguagestreetname">alternatelanguagestreetname</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#dependent-thoroughfare">Dependent thoroughfare</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#dependentthoroughfare">dependentthoroughfare</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#thoroughfare">Thoroughfare</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#thoroughfare">thoroughfare</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#welsh-dependent-thoroughfare">Welsh dependent thoroughfare</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#welshdependentthoroughfare">welshdependentthoroughfare</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#welsh-thoroughfare">Welsh thoroughfare</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#welshthoroughfare">welshthoroughfare</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#double-dependent-locality">Double dependent locality</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#doubledependentlocality">doubledependentlocality</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#dependent-locality">Dependent locality</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#dependentlocality">dependentlocality</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#locality">Locality</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#locality">locality</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#welsh-dependent-locality">Welsh dependent locality</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#welshdependentlocality">welshdependentlocality</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#welsh-double-dependent-locality">Welsh double dependent locality</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#welshdoubledependentlocality">welshdoubledependentlocality</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#town-name">Town name</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#townname">townname</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#administrative-area">Administrative area</a></td><td>N/A</td><td>Street Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/street-address#snnauthoritydescription">snnauthoritydescription</a></td><td>N/A</td><td>In AddressBase Plus this was the Local Highway Authority name. This can be found in the <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/street-address">Street Address</a> feature type and is now supplied additionally with the authority's code as well as name.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#post-town">Post town</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#posttown">posttown</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#welsh-post-town">Welsh post town</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#welshposttown">welshposttown</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#postcode">Postcode</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#postcode">postcode</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#postcode-locator">Postcode locator</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#postcode">postcode</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#postcode-type">Postcode type</a></td><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-fundamentals/code-lists-and-enumerations/postcodetypecode">PostcodeTypeCode</a></td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#postcodetype">postcodetype</a></td><td><a href="https://docs.os.uk/osngd/code-lists/code-lists-overview/postcodetypevalue">postcodetypevalue</a></td><td>Attribute serves the same purpose. It is now the full description rather than a code.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#delivery-point-suffix">Delivery point suffix</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#deliverypointsuffix">deliverypointsuffix</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#addressbase-postal">Addressbase postal</a></td><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-fundamentals/code-lists-and-enumerations/addressbasepostalcode">AddressbasePostalCode</a></td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#postcodesource">postcodesource</a></td><td><a href="https://docs.os.uk/osngd/code-lists/code-lists-overview/addressbasepostalcode">addressbasepostalvalue</a></td><td>Attribute serves the same purpose. It is now the full description rather than a code.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#po-box-number">PO Box number</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address/Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#poboxnumber">poboxnumber</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#ward-code">Ward code</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td>Available in the <a href="https://docs.os.uk/osngd/data-structure/address/related-components/related-entity">Related Entity</a>, Related Component table</td><td>N/A</td><td>Information is now provided in a cross-reference table as 'Ward'.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#parish-code">Parish code</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td>Available in the <a href="https://docs.os.uk/osngd/data-structure/address/related-components/related-entity">Related Entity</a>, Related Component table</td><td>N/A</td><td>Information is now provided in a cross-reference table as 'Parish Or Community'.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#rm-start-date">RM start date</a></td><td>N/A</td><td>Royal Mail Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/royal-mail-address#entrydate">entrydate</a></td><td>N/A</td><td>Attribute serves the same purpose.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#multi-occ-count">Multi occ count</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#parentuprn">parentuprn</a>, <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#rootuprn">rootuprn</a>, and <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#hierarchylevel">hierarchylevel</a></td><td>N/A</td><td>Full hierarchy is now provided via the <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#parentuprn">parentuprn</a>, <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#rootuprn">rootuprn</a>, and <a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#hierarchylevel">hierarchylevel</a> attributes. Using these attributes it is possible to traverse up and down the hierarchy and determine any exact counts as required. It is also possible to calculate this using the OS NGD <a href="https://docs.os.uk/osngd/data-structure/buildings/building-features/building">Building</a> and <a href="https://docs.os.uk/osngd/data-structure/buildings/building-features/building-part">Building Part</a> Feature types.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#voa-ndr-primary-description-code">VOA NDR primary description code</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td>Available in the <a href="https://docs.os.uk/osngd/data-structure/address/related-components/other-classification">Other Classification</a>, Related Component table</td><td>N/A</td><td>Information is now provided in a cross-reference table as 'VOA Primary Description'.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#voa-ndr-scat-code">VOA NDR scat code</a></td><td>N/A</td><td>Built/Historic/Pre-Build Address</td><td>Available in the <a href="https://docs.os.uk/osngd/data-structure/address/related-components/other-classification">Other Classification</a>, Related Component table</td><td>N/A</td><td>Information is now provided in a cross-reference table as 'VOA Special Category'.</td></tr><tr><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-plus/addressbase-plus-technical-specification/feature-types/address#alt-language">Alt language</a></td><td><a href="https://docs.os.uk/os-downloads/addressing-and-location/addressbase-fundamentals/code-lists-and-enumerations/languagecode">LanguageCode</a></td><td>Built/Historic/Pre-Build Address</td><td><a href="https://docs.os.uk/osngd/data-structure/address/gb-address/built-address#alternatelanguage">alternatelanguage</a></td><td><a href="https://docs.os.uk/osngd/code-lists/code-lists-overview/languagevalue">languagevalue</a></td><td>Attribute serves the same purpose.</td></tr></tbody></table>


---

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.os.uk/more-than-maps/os-ngd-migration/comparison-of-end-of-life-address-products/addressbase-plus-attribute-comparison.md?ask=<question>
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