# Context

You can save documents with the same `Key` under different `Context`. Which means, that `Key`, `Rank` and `Context` become a unique key. 

You use a `Key` to store a certain value. Use the `Context` to store that value in a specific context.

For example, you want to store PDF files, related to a costumer. Use the `Key` as the file name (reference) and use the *CustomerId* as the `Context`.

<figure><img src="https://2245798658-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJFHpAiTyY4pRTGiX4HTM%2Fuploads%2FfsAR6jcfZ3co3ZLlNrB0%2Fimage.png?alt=media&#x26;token=6301c2fe-2c9c-4d2f-9a65-fca2e89bc0b6" alt=""><figcaption><p>Same Key under different Context</p></figcaption></figure>