3. The method of claim 2 , wherein the domain specific shingling function comprises identifying a plurality of different domains in each one of the plurality of documents based on the metadata.
3. The method of claim 2 , wherein the domain specific shingling function comprises identifying a plurality of different domains in each one of the plurality of documents based on the metadata. 4. The method of claim 3 , wherein the clustering comprises: calculating, by the processor, a similarity score for each one of the plurality of different domains of a document to a corresponding domain of each remaining document of the plurality of documents; calculating, by the processor, an overall similarity score based on the similarity score for the each one of the plurality of different domains for the document to the each remaining document of the plurality of documents; and clustering, by the processor, the document and one or more of the each remaining document of the plurality of documents when the overall similarity score is above a threshold.