Generally speaking, interoperability is the ability of two or more systems or components to exchange information and to use the information that has been exchanged (IEEE., 1990). When this ability is not achieved, interoperability becomes a problem that must be solved.
Solutions to interoperability problems can be characterized according to interoperability approaches defined in (ISO14258, 1999). EI problems can be localized into interoperability barriers and characterized by EI concerns, as defined in the Framework for Enterprise Interoperability (FEI). FEI has been initially elaborated in INTEROP NoE (Chen, Dassisti, & Elvester, 2007) and is now published as an international standard (ISO 11354 - 1). It defines a classification scheme for interoperability knowledge according to three dimensions: