> For the complete documentation index, see [llms.txt](https://gitbook.brown.edu/xromm/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook.brown.edu/xromm/xromm-xmaportal-user-manual/xromm-data-organization.md).
# XMAPortal : Data Organization
## Overall data organization within the XMA Portal.
Each repository contains a number of studies. Each study within each repository is associated with one or more PI(s) (Principal Investigator), each study is also associated with a study leader which is usually the grad. student or post-doc. that performed the actual experiments within each study.
## Data organization within each study
The figure below shows the data organization within each study. A study usually contains several trials, and each trial contains files and metadata associated with that trial. A study can also contain files that are not part of a trial.
