How do I get the file extension or mimetype of a document via API?

Hi,

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I'm searching for a way to get the mimetype of a document uploaded to a task or project via the REST API.

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When I'm using the endpoint "/docu/search", we're getting only the name without the file extension.

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https://developer.workfront.com/documents.html#get-/docu/search

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Is there a way to get the file extension or mimetype of a document via API?

Thanks

Patrick