Health professionals are encouraged to use MOS and NOS for three main reasons :

• enhance the interoperability of information systems by harmonising names, attributes, codes and nomenclatures;
• share the same understanding of the information, regardless of which directory or reference document it is taken from;
• facilitate the specification, analysis and conception of a project. 

The ANS offers training on MOS-NOS and the elaboration method for exchanges’ functional specs (see our Documentation section).

The illustration below gives you examples of the types of professionals using the MOS-NOS: 

The MSSanté network system creates a Secure Space, which is managed by the ANS. This Secure Space includes messaging service providers under contract with the Agency (health structures, operators, administrators, etc.) in order to secure globally the electronic messaging services proposed to health professionals. There are many messaging services integrated to the Secure Space, which protects the sharing of health data.

The MOS is a collection of concepts described homogeneously and neutrally in terms of technologies. It offers a common description of the information processed and exchanged in the information systems to make digital communication easier.

The overall consistency of the MOS is founded on the definition and description of its UML (Unified Modelling Language) concepts.

Some MOS concepts can be coded. They are associated with the nomenclatures of health objects (NOS), i.e. lists of codes/labels.

You are encouraged to use MOS and NOS to :

• optimise and coordinate efforts when you analyse or conceive a system (or an application) by re-using the same semantic components;
• make sure there is consistency in your internal developments and with external systems, for the best possible interoperability.

The European Commission’s studies have determined there is a need for a base vocabulary, such as MOS and NOS, which can be used as a starting point for:

• develop and evolve information systems (IS) to formalise the conceptual and logical data they utilise (for instance, the MOS is a reference for the modelling of the RPPS);
• share information between ISs to create specific models of data they can use (thus, the MOS is underlying the ROR exposure model);
• combine and synthetise elements originating from different sources;
• publish data in a common format, such as a directory or catalogue of service (for example, the Annuaire Santé / Health Pro Directory).

MSSanté is a secure messaging system that enables authorised professional to share sensitive patient data in a safe manner, in the context of the patient’s care monitoring. As of now, billing and invoicing data are not included in this perimeter.

MSSanté is an umbrella term which refers to the network of secure messaging services dedicated to healthcare, integrated in a Secure Space. Mailiz is one of the messaging services that is part of this Secure Space, which is managed by the ANS and proposed to health professionals by the Ordres de Santé (Health Governing Bodies).