Duality is an important topic in informetrics, especially in connection with the classical informetric laws. Yet this concept is less studied in information retrieval. It deals with the unification or symmetry between queries and documents, search formulation versus indexing, and relevant versus...

Information quality has become the number one issue a knowledge worker faces in today’s environment, due to the high noise‐to‐signal ratio of non‐essential content in knowledge repositories and the lack of quality measurement for the information. This paper discusses information...