Third-party vendors and some manufacturers of architectural products have compiled libraries of architectural components for use in ArchiCAD. The program includes Geometric Description Language (GDL) used to create new components. Also API (Application Programming Interface) and ODBC database connections are supported for third party Add-On developers. Via direct API links to 4D and 5D software such as Vico Office Suite or Tocoman iLink, the ArchiCAD model can be exported to BIM-based cost estimation and scheduling. ArchiCAD is also directly linked via API to Solibri's Model checking and quality assurance tools. E.H.