BCF - BIM Collaboration Format

"The BIM Collaboration Format (BCF) allows different BIM applications to communicate model-based issues with each other by leveraging IFC models that have been previously shared among project collaborators. BCF was created for facilitating open communications and improving IFC-based processes to more readily identify and exchange model-based issues between BIM software tools, bypassing proprietary formats and workflows." BIM Collaboration Format (BCF), buildingSMART International

BIM Collaboration Format (BCF) (Wikipedia)