16. A computer method for creating an accumulation of documents stored as a set of clusters comprising the step of utilizing a stackable ash to determine whether to add a document to the set of clusters.
16. A computer method for creating an accumulation of documents stored as a set of clusters comprising the step of utilizing a stackable ash to determine whether to add a document to the set of clusters. 18. The computer method for creating an accumulation of documents stored as a set of clusters as in claim 16 , utilizing a mask to identify document clusters.