Need a MIME type

[rebeccaringuette]

The ASDF file format needs to obtain a MIME media type for accurate referencing, such as application/asdf. For example, the MIME format for FITS is application/fits with an available explanation on https://mime-type.com/application/fits/. This can then be used in accurate referencing for controlled vocabularies, such as https://cn.dataone.org/cn/v2/formats.
See the related addition request at DataONEorg/object-formats#44.
The information in the following linked comment may prove useful. zarr-developers/zarr-specs#123 (comment)

[perrygreenfield]

I think that is a good idea.