Custom mimetypes (MIME types)

What’s a mimetype?

When an internet request and response occurs, a Content-Type header is passed. A mimetype, also referred to as MIME type, identifies how the content that is being returned should be handled or used, based on type, by the application and browser. A MIME type is made up of a MIME group (i.e. application, image, audio, etc.) and a MIME subtype. For example, a MIME type is image/png where MIME group is image and subtype is png.

As types may contain vendor specific items, a custom vendor specific MIME type, vnd, can be used. A vendor specific MIME type will contain vnd such as application/vnd.jupyter.cells.

Custom mimetypes used in Jupyter and IPython projects

  • application/vnd.jupyter
  • application/vnd.jupyter.cells
  • application/vnd.jupyter.dragindex used by nbdime
  • application/x-ipynb+json for notebooks

Listing of custom mimetypes used for display

  • application/vnd.geo+json - GeoJSON spec application/vnd.geo+json is now deprecated and replaced by application/geo+json
  • application/geo+json - preferred GeoJSON spec
  • application/vnd.plotly.v1+json - Plotly JSON Schema