> 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/buildings-and-infrastructure-portfolio/os-open-toid/os-open-toid-overview/product-supply.md).
# Product supply
OS Open TOID provides unique identifiers and generalised coordinates for point, line and polygon features from a range of source products. These features are represented by a single point with associated information attached. Both the GeoPackage and CSV formats contain:
* TOID (unique identifier)
* Source Product (the product the feature can be found in)
* Version Number (indication of how many times the feature has been edited)
* Version Date (when the feature was last updated)
* XY (location derived for the feature)
A JSON (JavaScript Object Notation) file containing version information will also be supplied with the product.
## Available formats
The OS Open TOID and associated geometry data are available in 100km tiles and distributed in two formats using British National Grid (BNG) projection:
* GeoPackage (GPKG)
* Comma-separated values (CSV)
These formats allow the data to be easily integrated and ingested with either a GIS application or a database, respectively.
### GeoPackage overview
GeoPackage (GPKG) is an open standard data format as defined by the Open Geospatial Consortium (OGC). GeoPackage is designed to be a lightweight format that can contain large amounts of varied and complex data in a single, easy-to-distribute and ready-to-use file.
Please be advised that older versions of GIS software may need updating before being able to display and interact with GeoPackage files.
GeoPackage offers users the following benefits:
* The single file is easy to transfer and offers the end-user a rich experience.
* Attribute names are not limited in length, making it user-friendly.
* The file size limit is very large at 140TB, so lots of data can be easily accommodated (please note that a file size limit may be imposed by the file system to which the file is written).
* It supports raster, vector and database formats, making it a highly versatile solution.
* It is an OGC standard.
* In most cases, it is a plug and play format.
For information on how to open, use and understand a GeoPackage dataset, please refer to our [‘Getting Started with GeoPackage’ guide](/os-downloads/resources/product-resources/getting-started-with-geopackage-and-vector-tiles-guides/getting-started-with-geopackage.md). Further detailed information on GeoPackage can be taken from the [GeoPackage website](https://www.geopackage.org).
### CSV overview
CSV files are a delimited text file that uses commas or other characters to separate individual elements of a feature. It is used to store data, often in the form of a table. These tables can be freely loaded into databases and programs, allowing for the easy loading and updating of data holdings.
The CSV format of OS Open TOID means:
* The first row will contain header information.
* There will be one record per line in each file.
* Fields will be separated by commas.
* No comma will be placed at the end of each row in the file.
* Records will be terminated by Carriage Return / Line Feed.
## Supply mechanism
OS Open TOID is supplied as a free online download and is available without registration from the [OS Data Hub](https://osdatahub.os.uk/data/downloads/open).
## Coverage
This product covers Great Britain.
OS Open TOID and associated geometry data are available in 100km tiles and distributed in two product formats (GeoPackage or CSV) using British National Grid (BNG) projection.
## Currency
OS Open TOID will be updated through a Full Supply on a 6-weekly basis (in-line with the OS MasterMap Topography Layer COU (Change-Only Update) releases outlined in the [Product Refresh Dates page](/os-downloads/resources/product-resources/product-refresh-dates.md) and will maintain consistency with the OS MasterMap products).
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