Patent ID: 8560548
Filing Date: 2013-10-15
Classification: G06F

Abstract:
1. A computer-implemented method for accessing content items in a content store comprising: maintaining a text index of content items in a content store to enable a keyword search on the content items; receiving a query having a keyword and generating a hit list from the text index using the keyword, the hit list comprising two or more content items of the content store; extracting frequent phrases from text within content items of the hit list by estimating an intersection size, wherein the estimating comprises executing an algorithm to intersect a first posting list generated from globally frequent phrases with a second posting list generated from the hit list, wherein the algorithm terminates the executing in response to the earlier of identifying a predetermined M maximum number of comparisons or a predetermined I maximum number of common points; assigning a relative relevance to the frequent phrases wherein frequent phrases having a relatively high relevance are relevant phrases; and grouping content items into topics based on presence of relevant phrases within the content items of the hit list.