The Industry Foundation Classes (IFC) is an object-oriented data model standard for building objects, developed by the International Alliance for Interoperability (IAI).
The IFC standard serves as a neutral and public protocol for exchanging engineering data across the international construction industry. It is not controlled by any individual or group of suppliers. As an object-oriented 3D building product data standard, IFC was recognized as an international standard in 2005 and has since gained widespread acceptance in global construction engineering.
Many building software developers have integrated the IFC standard into their development processes, enabling most BIM-based software to support IFC. The success of IFC in enabling data exchange is due to its architectural design, which consists of four levels arranged from bottom to top: the resource layer, core layer, interaction layer, and domain layer. Each level contains several information description modules that define specific information types and rules.
IFC defines a standardized format for BIM that specifies how information should be stored, exchanged, and used throughout all stages of a construction project’s lifecycle. It supports consistent recording of information ranging from minute details to comprehensive data for engineering projects, including geometry, attributes, functionality, and more. Additionally, IFC facilitates data retention across different disciplines and enhances information traceability.
As a universal exchange standard, IFC enables the sharing of building information models among various engineering software and systems involved in construction, operation, and other phases. It acts as a bridge for information transmission between different systems and software, allowing seamless integration of data across platforms. When different companies within the construction supply chain use IFC to exchange information, differences in their information management systems and software interfaces do not pose a barrier. It is not necessary for all systems to fully support the IFC standard; rather, the exported information must comply with the IFC conversion standard to ensure successful exchange.
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