instead of the mimetype. According to [MISP DataModels](https://www.misp-project.org/datamodels/#types)
```
mime-type: A media type (also MIME type and content type) is a two-part identifier for file formats and format contents transmitted on the Internet
```
more precisely defined in [RFC2045](https://tools.ietf.org/html/rfc2045) and others.
The description returned by libmagic is more useful than the generic mime-type,
but I did not find a place to put the description in the current data model.
