# Page Not Found

The URL `ref/mdb/plugins/SPATIAL_REF_SYS` does not exist.

You might be looking for one of these pages:
- [MYSQL_JSON](https://mariadb.com/docs/server/reference/plugins/other-plugins/mysql_json.md)
- [Special Functions](https://mariadb.com/docs/server/reference/sql-functions/special-functions.md)
- [online_alter_log](https://mariadb.com/docs/server/reference/plugins/other-plugins/online_alter_log.md)
- [User Variables Plugin](https://mariadb.com/docs/server/reference/plugins/other-plugins/user-variables-plugin.md)
- [SPATIAL INDEX](https://mariadb.com/docs/server/reference/sql-structure/geometry/spatial-index.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://mariadb.com/docs/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://mariadb.com/docs/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/docs/server/reference/plugins/other-plugins/mysql_json.md`)
- Use `Accept: text/markdown` header for content negotiation