# Header – (Type 10 Record)

A structured entry that provides key information about the source, time and supply mechanism of the AddressBase Premium file.

{% hint style="info" %}
A Header record is not provided in GML or GPKG
{% endhint %}

## Data type attributes <a href="#data-type-attributes" id="data-type-attributes"></a>

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.

### Record identifier

Identifies the record as a Header Record (type 10).

* **Attribute Name**: Not provided (GML), RECORD\_IDENTIFIER (CSV), Not provided (GPKG)
* **Data Type:** Integer
* **Size**: 2
* **Multiplicity**: \[1]

### Custodian name

Name of the data provider organisation.

* **Attribute Name**: Not provided (GML), CUSTODIAN\_NAME (CSV), Not provided (GPKG)
* **Data Type:** char
* **Size**: 40
* **Multiplicity**: \[1]

### Local custodian code

Unique identifier for the data provider code.

* **Attribute Name**: Not provided (GML), LOCAL\_CUSTODIAN\_CODE (CSV), Not provided (GPKG)
* **Data Type:** Integer
* **Size**: 4
* **Multiplicity**: \[1]

### Process date

The date on which the data supply was generated.

* **Attribute Name**: Not provided (GML), PROCESS\_DATE (CSV), Not provided (GPKG)
* **Data Type:** Date
* **Multiplicity**: \[1]

### Volume number

The sequential number of the volume in the transfer set.

* **Attribute Name**: Not provided (GML), VOLUME\_NUMBER (CSV), Not provided (GPKG)
* **Data Type:** Integer
* **Size**: 3
* **Multiplicity**: \[1]

### Entry date

Date of data entry for this volume.

* **Attribute Name**: Not provided (GML), ENTRY\_DATE (CSV), Not provided (GPKG)
* **Data Type:** Date
* **Multiplicity**: \[1]

### Time stamp

Time of file creation in HH:MM:SS.

* **Attribute Name**: Not provided (GML), TIME\_STAMP (CSV), Not provided (GPKG)
* **Data Type:** Time
* **Multiplicity**: \[1]

### Version

{% hint style="info" %}
The version number relates to the product schema and not this technical specification.
{% endhint %}

Version number of the product schema, for example, 1.0, 2.0.

* **Attribute Name**: Not provided (GML), VERSION (CSV), Not provided (GPKG)
* **Data Type:** char
* **Size**: 7
* **Multiplicity**: \[1]

### File type

States whether the data supply is a full supply or change only supply.

* **Attribute Name**: Not provided (GML), FILE\_TYPE (CSV), Not provided (GPKG)
* **Code List Name:** [FileTypeCode](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/code-lists-and-enumerations/filetypecode)
* **Size**: 1
* **Multiplicity**: \[1]