IEC 61158-5-14:2010 specifies the structure and services of the type 14 IEC fieldbus Application Layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498) and the OSI Application Layer Structure (ISO/IEC 9545). This second edition cancels and replaces the first edition published in 2007 and constitutes a technical revision. The main change with respect to the previous edition are: - updated Normative references and Bibliography; - corrections of the edit error; - specification changes for CPF3; - update of the requirements for all conformance classes; - update of the requirements for all conformance services. This bilingual version published in 2012-01 corresponds to the English version published in 2010-08.