> For the complete documentation index, see [llms.txt](https://docs.virtual-flow.org/documentation-vf1/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.virtual-flow.org/documentation-vf1/principles-and-theory.md).

# Background  and Principles

In order to be able to use VirtualFlow, some background and principles about the platform need to be comprehended:

* [The directory structure of VirtualFlow](/documentation-vf1/principles-and-theory/directory-structure.md)
* [The structure of the input and output databases](/documentation-vf1/principles-and-theory/naming-conventions.md)
* [How jobs of VirtualFlow are organized](/documentation-vf1/principles-and-theory/job-organization.md)