> For the complete documentation index, see [llms.txt](https://docs.sharelogic.com/unifi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sharelogic.com/unifi/2.2/transport.md).

# Transport

- [Transport Data Flow](https://docs.sharelogic.com/unifi/2.2/transport/transport-data-flow.md): An overview of the flow of data through Unifi's built in message bus.
- [Transactions](https://docs.sharelogic.com/unifi/2.2/transport/transactions.md): A Transaction is an instance of a Message occurence.  It contains and tracks the processing of a Message using Stages and HTTP Requests.
- [Stages](https://docs.sharelogic.com/unifi/2.2/transport/stages.md): The Stage is the root staging table for all data mapping.  Stages are created dynamically at the time of data being sent/received.  The Staged Data fields will vary dependent on the data being sent.
- [HTTP Requests](https://docs.sharelogic.com/unifi/2.2/transport/http-requests.md): Every request is handled and tracked by a HTTP Request record.
- [Response Actions](https://docs.sharelogic.com/unifi/2.2/transport/response-actions.md): Response Actions are interceptors that allow you to customise the way responses are handled.