> ## Documentation Index
> Fetch the complete documentation index at: https://developer.onecodex.com/llms.txt
> Use this file to discover all available pages before exploring further.

# The Metadata Resource

Metadata resources provide a means for adding structured metadata to your samples. The Metadata resource include a number of default fields, and can also be extended with arbitrary custom metadata. Permissions on metadata follow the Samples they describe – i.e., the Metadata resource for a public sample will be publicly accessible. Here is an example metadata entry:

<Frame caption="The metadata editing modal on the One Codex web application. Note that the Project is actually a property on the Sample resource.">
  <img src="https://mintcdn.com/onecodex/DiToQ9fYtYBO3lRU/images/api/metadata_edit_modal.png?fit=max&auto=format&n=DiToQ9fYtYBO3lRU&q=85&s=0d304ce5482f272b19bb81deb3f6b645" width="914" height="578" data-path="images/api/metadata_edit_modal.png" />
</Frame>

Metadata include the following **properties**: