1. A machine implemented system that effectuates queryline tracking, comprising: an analysis component that constructs and utilizes an evolving topic model to discover, within one or more documents delivered in a stream, one or more themes or storylines associated with a query, wherein the evolving topic model is incrementally constructed as the one or more documents having new data are delivered in the stream; a ranking component that utilizes the one or more documents and the one or more themes or storylines to provide a relative ordering of the one or more documents with respect to the theme, the ranking component employing a word-document co-occurrence matrix represented by a bipartite graph constructed by the analysis component to provide the relative ordering of the one or more documents; and a notification component that generates and propagates an alert based at least in part on the relative ordering and a novelty related to the one or more themes or storylines.
8. The system of claim 1 , the evolving topic model employs an incremental aspect model with probabilistic and spectral techniques to discover the one or more themes or storylines within the one or more documents.