**4. Conclusion**

In this study, the BIM, IFC, and IFCXML representations of the building project data were explained over the sample housing project in the ACCC process. The sample housing project consisted of 9 floors, 8 flats, and 2 elevators. Flat plans on each floor were modeled differently from each other. It was completed with 179 rooms, 91 doors, 66 windows, 52 railings, 2 mechanical ventilation, 2 elevators, 8 stairs, 92 walls, 135 columns, 183 beams, and 95 slabs. The procedures to create the sample housing project with ArchiCAD software were described, respectively. The four attributes of the building elements of the sample housing project were defined with the IFC labels. The BIM model of the sample housing project was modeled. Finally, the IFCXML data file of the sample housing project was exported.

Before exporting to the IFCXML data file, all information regarding the building project must be modeled appropriately. When the BIM model is transformed into an IFC or IFCXML data file, building elements can be translated into the relevant IFC types. Transforming a building model into an IFC or IFCXML data file also provides the detailed information required for automated code compliance checking. This convenience allows the building regulation control, which the traditional method implements, to be controlled by the computer. It also brings the advantage that the building regulation control is checked over the IFC data file where the BIM model is

*The Data Representations of a Building Project: BIM Model, and IFC or IFCXML Data Standard DOI: http://dx.doi.org/10.5772/intechopen.104580*

exported, not on paper-based manually. This advantage is realized only in information technology systems and databases.

The IFC data standard is currently being developed, updated, and maintained by buildingSMART International [18]. buildingSMART develops open standards for BIM and openBIM. These open standards are related to data models, processes, and terms. Feature terms defined in the IFC specification depend on the terms defined in the buildingSMART data dictionary. buildingSMART collaborates with ISO to develop international, regional, and national standards. Today, when global standards are being accepted as national standards, both financial and technical support are provided to innovative studies in the field of automated code compliance checking by buildingSMART [20]. It is aimed to achieve the following objectives by buildingSMART:

