# Advanced Usage

_<small>Documentation pages for `BitBadger.Npgsql.Documents` redirect here. This library replaced it as of v3; see project home if this applies to you.</small>_

While the functions provided by the library cover lots of use cases, there are other times when applications need something else. Below are some of those.

- [Customizing Serialization][ser]
- [Related Documents and Custom Queries][rel]
- [Transactions][txn]
- [Referential Integrity with Documents][ref] (PostgreSQL only; conceptual)


[ser]: ./custom-serialization.md "Advanced Usage: Custom Serialization • BitBadger.Documents"
[rel]: ./related.md "Advanced Usage: Related Documents • BitBadger.Documents"
[txn]: ./transactions.md "Advanced Usage: Transactions • BitBadger.Documents"
[ref]: /concepts/referential-integrity.html "Appendix: Referential Integrity with Documents &bull; Concepts &bull; Relationanl Documents"