# Open Identifiers Policy Our Open Identifiers (ID) policy makes it easier for third parties to share information and link datasets. It is published as part of our OS Open MasterMap Implementation Programme, delivering some of our obligations under the [Public Sector Geospatial Agreement](https://www.ordnancesurvey.co.uk/customers/public-sector/public-sector-geospatial-agreement) (PSGA) between OS and the Government Digital Service, part of the Department of Science, Innovation and Technology. The policy is available in full on our website under [Open Identifiers (ID) policy](https://www.ordnancesurvey.co.uk/products/open-mastermap-programme/open-id-policy) covering both our OpenData products and services and Premium products and services. {% embed url="" %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.os.uk/os-downloads/resources/site-resources/open-identifiers-policy.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.