7. A system comprising: a disambiguation computer configured to disambiguate a document feature from an electronic document by being further configured to extract the document feature from the electronic document, and link, on-the-fly, as data is requested by a user computer, the extracted document feature to a set of document features having a primary document feature and a secondary document feature stored in a knowledge database of document features of a plurality of electronic documents, the secondary document feature including a proximity cluster of co-occurring features in the plurality of electronic documents; and an in-memory database computer configured to add the disambiguated document feature to the knowledge database of co-occurring document features when the disambiguated document feature matches a document feature of interest in an alert database based at least in part on the linked set of document features including the proximity cluster, wherein the in-memory database computer comprises a main memory storing an in-memory database that comprises the knowledge database, wherein the in-memory database computer is further configured to generate an electronic user alert regarding the matching.
7. A system comprising: a disambiguation computer configured to disambiguate a document feature from an electronic document by being further configured to extract the document feature from the electronic document, and link, on-the-fly, as data is requested by a user computer, the extracted document feature to a set of document features having a primary document feature and a secondary document feature stored in a knowledge database of document features of a plurality of electronic documents, the secondary document feature including a proximity cluster of co-occurring features in the plurality of electronic documents; and an in-memory database computer configured to add the disambiguated document feature to the knowledge database of co-occurring document features when the disambiguated document feature matches a document feature of interest in an alert database based at least in part on the linked set of document features including the proximity cluster, wherein the in-memory database computer comprises a main memory storing an in-memory database that comprises the knowledge database, wherein the in-memory database computer is further configured to generate an electronic user alert regarding the matching. 12. The system of claim 7 wherein the extracted document feature and the set of document features are linked temporarily.