IFC4说明文档，BIM时代的数据标准

<body> <p>Specification of data schema standard for the construction and fm industries<br> <p>Industry Foundation Classes<br> <p>Release IFC4, Official release<br> <p>published by buildingSMART International Ltd.<br> <p>copyright by buildingSMART International Ltd. 1996-2013<br> <p> </p> <p>using the IFC4 documentation requires a browser capable to display frames.</p> </body>