The document provides specifications for integrating a requester application with the Digital Locker system to allow users to select and share files from their Digital Locker accounts. The key steps are: 1. Register the requester application with Digital Locker to get an API key. 2. Integrate the Digital Locker requester widget on the web page using the JavaScript library. 3. Provide an upload service endpoint for Digital Locker to send the file URL, which the requester application must then use to retrieve and store the file.