This part of ISO 15926 specifies a conceptual data model for computer representation of technical information about process plants. The following are within the scope of this part of ISO 15926:- specification of requirements to produce, process, and transport process materials; - specification of functions required to produce and process the required materials, including the following: - hydrocarbon process and conditioning systems, - injected gas and water conditioning and injection systems, - oil and gas product transport systems, - safety and control systems, - electricity generation and supply systems, - steam generation and supply systems, - structures, - buildings and accommodation;- specification and selection of materials and equipment to provide the required production and processing functions, including information about market available materials and equipment; - installation and commissioning of plant equipment;- production and process operations, including process conditions and consumption, yields and quality of process material; - maintenance and replacement of equipment.The following are outside the scope of this part of ISO 15926:- construction of buildings, production facilities and equipment.