The National Institute of Building Sciences is developing the Whole Building Design Guide (WBDG). While not yet complete, there is already a substantial knowledge base for building professionals to draw upon. The purpose of WBDG is to help designers "improve the performance and quality of their buildings by following the guidance and recommendations provided within the categories of this web site." There are sections for specific building types and design objectives. Eventually, WBDG will have a broader range of categories, as well as a separate section devoted to products and systems. The site has been updated several times this year, and many more resources are planned.