Interoperability is the ability of information systems and procedures to which they give support, to share data and to facilitate the exchange of information and knowledge between them. It Is necessary for cooperation, development, integration and joint services by public administrations; for the execution of the various public policies; for different principles and rights; for technology transfer and reuse of applications for the benefit of a better efficiency; for cooperation between different applications that enable new services; all that facilitate the development of electronic administration and the information society.
In the field of public administrations, the consecration of the right of citizens to contact them via electronic means behaves obliged them. This obligation needs, as assumptions, promoting conditions for freedom and equality are real and effective, as well as the removal of obstacles that prevent or hinder the full exercise of the principle of technological neutrality and adaptability to the progress of information technologies and communication, thereby guaranteeing independence in the election of technological alternatives by citizens, as well as the freedom to develop and implement technological advances in an area of free market.
Law 40 / 2015, 1 October, of Legal Regime of the public Sector, recognizes the protagonism of interoperability and refers to it as one of the aspects that is bound to the laws are common and should therefore be addressed by the regulation of the state.