> For the complete documentation index, see [llms.txt](https://cmo-ci.gitbook.io/beagle-operators/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cmo-ci.gitbook.io/beagle-operators/beagle-internals/db-models.md).
# DB Models
All of the information necessary to store and query files and run information is represented in a postgres database, with a Django ORM API for querying for file information, and creating runs
**File** - Represents a file existing either on either a local or remote file system
**FileMetadata** - Represents arbitrary information associated with a File object. Stored in unstructured JSON format
**Port** - Represents an input to or output from a pipeline. Used to link File objects to the inputs and outputs of Pipeline Runs.
**Pipeline** - Stores the information related to a pipeline, the code for which is hosted in GitHub
**Run** - Represents a run of a pipeline.
\
**Operator** - Represents the logic / code that needs to be executed in order to build the inputs to a pipeline. This DB is linked to a python Class of type Operator, and this class implements the method get\_jobs() which will return a list of serialized job information objects.
## Schema Diagram
