For some use cases we have in mind in the MICO EU project, we'd need to send really large content to Stanbol. Therefore the current REST interface (posting the content directly) is not suitable in such scenario. So we'd need to have a way to send content by reference to the Stanbol Enhancer.
I've found RFC2017 (http://tools.ietf.org/html/rfc2017), which defines a way to parsed external content by using
Content-type: message/external-body; access-type=URL; URL="http://example.org/file"
If the community fins this feature interesting, we can start to play a bit with a draft implementation, and contribute it as soon as it's working.