“MnM is an annotation tool which provides both automated and semi-automated support for annotating web pages with semantic contents. MnM integrates a web browser with an ontology editor and provides open APIs to link to ontology servers and for integrating information extraction tools.” ok….
See also Amilcare (http://nlp.shef.ac.uk/amilcare/) an “adaptive Information Extraction (IE) system intended as support to document annotation in the Semantic Web framework” and Dot.Kom (http://nlp.shef.ac.uk/dot.kom/) another tool for the “automatic or semi-automatic … extraction of information from web-related documents.”
In fact the the entire Knowledge Media Institute site at the Open University is utterly fascinating.
And finally a ‘backwards link’ search on the MnM page leads to http://annotation.semanticweb.org/tools which I wish I had found earlier – a seemingly authoritative list of semantic web authoring and annotation tools. – SWL