An Ontology of Reasoning, Certainty and Attribution (ORCA) by Anita de Waard and Jodi Schneider.
Anita’s slides for her presentation tomorrow at ISWC2012.
Interesting slides that conclude with copious references to the literature.
I don’t doubt that “hedging” can be detected, but am less certain about the granularity allowed by the presented model.
Still, interesting research and merits your attention.