> Source URL: /guides/ontology.guide
# PathMX BYOO (Bring Your Own Ontology) Guide

A core pillar of PathMX is "type hinted" file names. This allows you and your agents to reason about the role of each file in the repository.

A type hint is a file name prefixed with a type identifier. For example:

- `task.guide.md` is a task guide
- `project-1.spec.md` is a project specification
- `project-1.project.md` the project itself (created from the spec)
- `week-1.lab.md` a lab assignment

Ontologies should match the domain you are building for.

For example, if you are creating an event site, you may type hint files like this:

- `speaker-1.keynote.md`
- `session-1.workshop.md`
- `session-1.breakout.md`

If not type hint is specified, the file will be typed as a `document` by default.

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## Paths

PathMX comes with one specicific ontology built in: the "path" ontology.

If you name a file with the suffix `.path.md` it will be parsed as a PathMX path.

A path is a way to sequence your content into a progressable learning path with support for locations, schedudling, presentors and more.

Read more about the Paths Plugin [here](./paths-plugin.guide.md).

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## Tags

The Tags Plugin looks for `*.tags.md` files and parses them into re-usable HTML-like tag components. This allows you to build unique and bespoke user interfaces for your content.

Read more about the Tags Plugin [here](./tags-plugin.guide.md).


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## Backlinks

The following sources link to this document:

- [Ontology Guide](/guides/cs1-quickstart.guide.llm.md)
- [Ontology Guide](/guides/agents.guide.llm.md)