Patent Document ID: 8600972
Application ID: 13403268

Base Claim:
1. A system for creating an index for a document collection, the system comprising: at least one processor; and a computer readable storage medium storing instructions that, when executed by the processor, causes the processor to: compare a keyword in one or more documents to a plurality of noisy keywords associated with a document collection; determine whether the keyword is a noisy keyword; determine, for one of the documents, a keyword position and a number of noisy keywords preceding the keyword; create, for the one of the documents, a token including a document identifier, an indication whether the keyword is a noisy keyword, the keyword position, and the number of noisy keywords preceding the keyword; and store the token in an index.

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Claim 3:
3. The system of claim 1 , the computer readable medium further storing instructions that, when executed by the processor, further causes the processor to: receive a search query, wherein the search query includes at least one search phrase; receive, for the at least one search phrase, an indication from a user specifying to perform one of a noisy phrase search or a noiseless phrase search; process a search using the at least one search phrase, wherein the search can be performed as a noisy phrase search or as a noiseless phrase search; and output a search result.