# Page Not Found

The URL `manual-zh/applications/data-models-relationships.html` does not exist.

You might be looking for one of these pages:
- [聚合管道更新](https://docs.mongoing.com/mongodb-crud-operations/update-documents/updates-with-aggregation-pipeline.md)
- [数据模型设计](https://docs.mongoing.com/shu-ju-mo-xing/data-model-design.md)
- [一对一嵌套关系模型](https://docs.mongoing.com/shu-ju-mo-xing/data-model-design/model-one-to-one-relationships-with-embedded-documents.md)
- [聚合表达式中的变量](https://docs.mongoing.com/aggregation/aggregation-reference/variables-in-aggregation-expressions.md)
- [数据建模介绍](https://docs.mongoing.com/shu-ju-mo-xing/data-modeling-introduction.md)

## How to find the correct page

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

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/mongodb-crud-operations/update-documents/updates-with-aggregation-pipeline.md`)
- Use `Accept: text/markdown` header for content negotiation