This International Standard specifies a representation of information associated with engineering, con-struction and operation of process plants. This representation supports: - the information requirements of the process industries in all phases of a plant?s life-cycle; NOTE 1 The process industries include those involved in oil and gas production, refining, power generation, and manufacturing of chemicals, pharmaceuticals, and food. - sharing and integration of information amongst all parties involved in the plant?s life-cycle.The following are within the scope of ISO 15926: - a generic, conceptual data model that supports representation of all life-cycle aspects of a process plant;- reference data that represents information common to many process plants and users; - scope and information requirements for additional reference data; - methods for the analysis of requirements and development of reference data; - procedures for registration and maintenance of reference data; - templates for the exchange of data used in a particular context and their mapping to the concep-tual data model; - methods for the development of such templates and their mapping to the conceptual data model; - conformance to the requirements of this International Standard.