28. The medium of claim 25 , wherein the semantic extractor and the reconstruction unit are implemented based on an auto-encoder.
25. A machine-readable non-transitory medium having information recorded thereon for document archiving, the information, when read by the machine, causes the machine to perform the following: receiving a document via a communication platform; analyzing the received document in accordance with at least one model to form a feature-based vector characterizing the document; generating a semantic-based representation of the document based on the feature-based vector, wherein the semantic-based representation has a reduced dimension; constructing a reconstructed feature-based vector based on the semantic-based representation of the document, by mapping the semantic-based representation to a feature space of the feature-based vector; forming a blurred feature-based representation of the document based on a difference between the feature-based vector and the reconstructed feature-based vector; generating a unified representation for the document based on the blurred feature-based representation and the semantic-based representation; and archiving the document in an information archive based on the unified representation of the document.