> 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/addresses-and-names-portfolio/addressbase-premium/addressbase-premium-technical-specification/structured-data-types/classification-type-32-record.md).
# Classification – (Type 32 Record)
A structured entry that provides the code for the type of BLPU and the classification scheme from which the code is taken. This record holds the classification of a property and allows one to search upon the use of a feature.
## Data type attributes
The following page provides details about the attributes included with this data type, their types in the different output formats, and other important metadata about them.
### fid
A non-persistent integer which is autogenerated and is required within the OGC GPKG format.
* **Attribute Name**: Not provided (GML), Not provided (CSV), fid (GPKG)
* **Data Type:** Integer
* **Multiplicity**: \[1]
### Record identifier
Identifies this record as a Classification Record (type 32).
* **Attribute Name**: Not provided (GML), RECORD\_IDENTIFIER (CSV), Not provided (GPKG)
* **Data Type:** Integer
* **Size**: 2
* **Multiplicity**: \[1]
### Change type
Type of record change – please see [COU supply](/os-downloads/products/addresses-and-names-portfolio/addressbase-premium/addressbase-premium-technical-specification/supply-and-update.md#cou-supply) for more information.
* **Attribute Name**: Not provided (GML), CHANGE\_TYPE (CSV), change\_type (GPKG)
* **Code List Name:** [ChangeTypeCode](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/code-lists-and-enumerations/changetypecode.md)
* **Size**: 1
* **Multiplicity**: \[1]
### Pro order
The order in which the records were processed in to create the data supply.
* **Attribute Name**: Not provided (GML), PRO\_ORDER (CSV), Not provided (GPKG)
* **Data Type**: Integer
* **Size**: 16
* **Multiplicity**: \[1]
### UPRN
Unique Property Reference Number (UPRN) - foreign key used to reference the LPI to the corresponding BLPU.
* **Attribute Name**: Not provided (GML), UPRN (CSV), uprn (GPKG)
* **Data Type**: Integer
* **Size**: 12
* **Multiplicity**: \[1]
### Class key
Unique key for the classification record and primary key for this table.
* **Attribute Name**: classKey (GML), CLASS\_KEY (CSV), class\_key (GPKG)
* **Data Type**: CharacterString (GML), char (CSV), String (GPKG)
* **Size**: 14
* **Multiplicity**: \[1]
### Classification codes
{% hint style="info" %}
The [AddressBase Classification Scheme](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/classification-scheme) provides varying levels of classification for addresses which are captured and maintained by the Local Authorities and Ordnance Survey.
{% endhint %}
A code that describes the classification of the record.
* **Attribute Name**: classificationCode (GML), CLASSIFICATION\_CODE (CSV), classification\_code (GPKG)
* **Data Type**: CharacterString (GML), char (CSV), String (GPKG)
* **Size**: 6
* **Multiplicity**: \[1]
### Class scheme
The name of the classification scheme used for this record.
* **Attribute Name**: classScheme (GML), CLASS\_SCHEME (CSV), class\_scheme (GPKG)
* **Data Type**: CharacterString (GML), char (CSV), String (GPKG)
* **Size**: 60
* **Multiplicity**: \[1]
### Scheme version
The name of the classification scheme used for this record.
* **Attribute Name**: schemeVersion (GML), SCHEME\_VERSION (CSV), scheme\_version (GPKG)
* **Data Type**: CharacterString (GML), float (CSV), double (GPKG)
* **Size**: (precision, scale) – 2(1)
* **Multiplicity**: \[1]
### Start date
Date on which this classification record was first loaded into the database.
* **Attribute Name**: Provided in [EntityWithLifeCycle](/os-downloads/products/addresses-and-names-portfolio/addressbase-premium/addressbase-premium-technical-specification/structured-data-types/entity-with-lifecycle.md) (GML), START\_DATE (CSV), start\_date (GPKG)
* **Data Type**: Date
* **Multiplicity**: \[1]
### End date
Date this classification record ceased to exist.
* **Attribute Name**: Provided in [EntityWithLifeCycle](/os-downloads/products/addresses-and-names-portfolio/addressbase-premium/addressbase-premium-technical-specification/structured-data-types/entity-with-lifecycle.md) (GML), END\_DATE (CSV), end\_date (GPKG)
* **Data Type**: Date
* **Multiplicity**: \[0..1]
### Last update date
The date on which any attribute on this record was last changed.
* **Attribute Name**: Provided in [EntityWithLifeCycle](/os-downloads/products/addresses-and-names-portfolio/addressbase-premium/addressbase-premium-technical-specification/structured-data-types/entity-with-lifecycle.md) (GML), LAST\_UPDATE\_DATE (CSV), last\_update\_date (GPKG)
* **Data Type**: Date
* **Multiplicity**: \[1]
### Entry date
The date on which the address record associated with this classification record was inserted into the Local Authority database.
* **Attribute Name**: Provided in [EntityWithLifeCycle](/os-downloads/products/addresses-and-names-portfolio/addressbase-premium/addressbase-premium-technical-specification/structured-data-types/entity-with-lifecycle.md) (GML), ENTRY\_DATE (CSV), entry\_date (GPKG)
* **Data Type**: Date
* **Multiplicity**: \[1]
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