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Mediakit decides how to present a file from its extension. Extensions it maps to an image type get a thumbnail; extensions it maps to any other known type get an icon for that type. Both maps have sensible defaults, and both can be replaced. You would change them to add a format your teams use that is not recognised by default, or to stop treating a format as an image.

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Prerequisites

  • Administrator access to the Polarion server configuration
  • Permission to restart the Polarion service

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The Two Properties

Both are Polarion system properties, and both take the same format: extension=mimetype pairs separated by semicolons.

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Replace, Don’t Extend

Setting a property replaces the whole default list — it does not add to it.Whatever you set becomes the complete map. If you set nextedy.files.imagemimes to a single pair, that one extension is the only one treated as an image, and every other image format loses its thumbnail.To add a format, take the full default list from Supported File Types, append your pair, and set the result.

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Apply a Change

1

Compose the full value

Start from the current default list, add or remove pairs, and keep the extension=mimetype;… format.
2

Set the system property

Add the property to your Polarion configuration alongside the server’s other system properties.
3

Restart Polarion

Restart the service so the new value is read, then reload a work item with the gallery to confirm the file type now presents as you intended.

Supported File Types

The complete default lists for both properties.
Last modified on September 3, 2026