1. A method for computing summary information on documents, wherein the method comprises: identifying, by a computer, a result set of matching documents and query-dependent subsections of the matching documents by applying a query to a set of documents, computing summary information, the summary information comprising a plurality of aggregated summary value metrics (SVMs), each of the aggregated SVMs corresponding to a different attribute-value pair in a plurality of attribute-value pairs, each of the attribute-value pairs specifying a different value of a single attribute, wherein for each of the aggregated SVMs, the aggregated SVM for an attribute-value pair is a measure of a probability that, within a given scope within the matching documents, the attribute of the attribute-value pair has the value of the attribute-value pair; and displaying a graphical user interface object that presents the summary information to a user.