1. A tangible, machine-readable media, comprising: code adapted to analyze a data series based on a grammar comprising at least an initial grammar; code adapted to calculate a statistical heuristic for each sub-sequence of the analyzed data series; code adapted to compare a selected statistical heuristic with one or more reference conditions; code adapted to update the grammar and the data series with a symbol representing a sequence corresponding to the selected statistical heuristic based upon a non-termination result of the comparison; and code adapted to identify the sequence as a sequence of interest based upon a termination result of the comparison.