# Extra - [Understanding the Database](https://enappd.gitbook.io/ionic-grocery-shopping-app-platform/extra/understanding-the-database.md): Understand the existing database, and how you can add/ remove any fields from it - [App Specific Requirements](https://enappd.gitbook.io/ionic-grocery-shopping-app-platform/extra/app-specific-requirements.md): This page described additional requirement to run this app properly. - [Add More Features](https://enappd.gitbook.io/ionic-grocery-shopping-app-platform/extra/add-more-features.md): Check how you can add more features to this app package - [FAQs](https://enappd.gitbook.io/ionic-grocery-shopping-app-platform/extra/faqs.md) --- # 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://enappd.gitbook.io/ionic-grocery-shopping-app-platform/extra.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.