Abstract: A computer-implemented method for document management includes extracting from an input document a set of terms, each term including a fixed number of words. Respective numbers of the terms that occur in each of a group of stored documents are counted, and a respective association rate is computed between the input document and each of at least some of the stored documents responsively to the respective numbers of the terms that were counted in the stored documents. One or more of the stored documents are identified as versions of the input document responsively to the association rate, and an identification of the stored documents that are versions of the input document is outputted.

Abstract: A method for document management includes automatically extracting respective features from each of a set of documents. The features are processed in a computer so as to generate respective vectors for the documents, each vector including elements having respective values that represent properties of a respective document. A similarity between the documents is assessed by computing a measure of distance between the respective vectors. The documents are automatically clustered responsively to the similarity so as to identify a cluster of the documents belonging to a common document type. Similar methods may be used in supervised categorization, wherein documents are compared and categorized based on a training set that is prepared for each document type.

Abstract: A computer-implemented method for processing information includes collecting data objects from one or more data repositories, the data objects having respective properties, which identify the data objects. The properties of the collected data objects are analyzed in order to derive respective identifiers corresponding to the data objects. A text string that matches one of the identifiers of a data object is identified within a context in a document. Responsively to the context, an indication that the identified text string is a valid instance of the data object is generated, and the document is processed responsively to the indication.