Patent ID: 9594755
Date: 2017-03-14
CPC Classifications: G06F

Claim:
1. An electronic document repository system comprising: a storage arrangement for storing a plurality of electronic documents; tagging means for permitting users of the repository system to apply tags to the documents; automatic tag processing means for generating a lattice representation and assigning stored documents to nodes of the lattice representation based upon the tags applied to the documents; and a lattice representation difference determiner configured to compare two lattice representations of the type generated by the automatic tag processing means and to generate a difference value indicating an extent by which the compared lattice representations differ from one another according to an edit distance measure, wherein assignment of stored documents to nodes of the lattice is performed in dependence upon the difference value generated by the difference determiner, wherein the system is configured to generate a new lattice representation from the tagged documents in the repository system on a periodic basis and to ascertain an amount of drift of the lattice between each iteration or between a reference lattice and the lattice generated after each iteration, and wherein it is further configured to perform an action in the event that the drift exceeds some threshold criterion.