# Page Not Found The URL `mod-5-oop/5-has-many-belongs-to` does not exist. This page may have been moved, renamed, or deleted. ## Suggested Pages You may be looking for one of the following: - [7. Introduction to System Design & UML Diagrams](https://marcylabschool.gitbook.io/marcy-lab-school-docs/mod-2-oop/7-system-design-uml.md) - [5. Inheritance](https://marcylabschool.gitbook.io/marcy-lab-school-docs/mod-2-oop/5-inheritance.md) - [Cheat Sheet](https://marcylabschool.gitbook.io/marcy-lab-school-docs/mod-2-oop/cheatsheet.md) - [3. Classes](https://marcylabschool.gitbook.io/marcy-lab-school-docs/mod-2-oop/3-classes.md) - [8. System Design Strategies and Principles](https://marcylabschool.gitbook.io/marcy-lab-school-docs/mod-2-oop/8-system-design-strategies.md) ## How to find the correct page If the exact page cannot be found, you can still retrieve the information using the documentation query interface. ### Option 1 — Ask a question (recommended) Perform an HTTP GET request on the documentation index with the `ask` parameter: ``` GET https://marcylabschool.gitbook.io/marcy-lab-school-docs/mod-2-oop/7-system-design-uml.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. ### Option 2 — Browse the documentation index Full index: https://marcylabschool.gitbook.io/marcy-lab-school-docs/sitemap.md Use this to discover valid page paths or navigate the documentation structure. ### Option 3 — Retrieve the full documentation corpus Full export: https://marcylabschool.gitbook.io/marcy-lab-school-docs/llms-full.txt Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive. ## Tips for requesting documentation Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/marcy-lab-school-docs/mod-2-oop/7-system-design-uml.md`). You may also use `Accept: text/markdown` header for content negotiation.