Patent Document ID: 9268844
Application ID: 13836435

Base Claim:
1. A method of filtering documents considered to be relevant to a subject, comprising: selecting a set of documents considered to be relevant to a subject, wherein each document is an electronic document that comprise two or more distinct fields including at least a first field and a second field, each of the two or more distinct fields providing data corresponding to a category of data about the respective document; clustering documents in the set of documents into a cluster hierarchy according to data contained in the first field, the cluster hierarchy comprising a plurality of branches, each branch having a sub-tree; merging a received number of levels of the cluster hierarchy; and re-clustering the merged levels according to data contained in the second field.

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Claim 3:
3. The method of claim 1 , wherein the first field is a non-content field associated with each document in the set of documents and the second field is a content field associated with each document in the set of documents, wherein the content field comprises body text of the document and the non-content field comprises a field other than body text of the document.