Abstract: In some embodiments, techniques for knowledge-based validation of entities extracted from digital documents are provided. For example, a process may involve selecting, from among a plurality of entities extracted from a digital document, a first set of correlated entities. Selecting the first set of correlated entities may be based on a correlation that is indicated by relative location of the entities of the first set of correlated entities within the digital document or by similarity among tags of the entities of the first set. The method may also include determining, using a knowledge model, that the first set of correlated entities is not valid; and generating, using the knowledge model, a first modified set of correlated entities, wherein each entity of the first modified set of correlated entities corresponds to a respective entity of the first set of correlated entities.