9. A method in a computer system for assigning semantic characterization to a content stream, comprising the steps of: a) accessing the content stream; b) extracting tokens from the content stream, each token comprising metadata about a part of the content stream; c) associating one or more profiles with the extracted tokens; and d) representing at least a portion of the content stream in a semantic space corresponding to one or more profiles.
9. A method in a computer system for assigning semantic characterization to a content stream, comprising the steps of: a) accessing the content stream; b) extracting tokens from the content stream, each token comprising metadata about a part of the content stream; c) associating one or more profiles with the extracted tokens; and d) representing at least a portion of the content stream in a semantic space corresponding to one or more profiles. 17. A method as recited in claim 9, further comprising the step of querying the semantic space.