host, or in a hybrid mode in which they performed some transactions locally and
Each bit in the bitmap corresponds to one field:
，详情可参考谷歌浏览器下载
想象一下，你用饼干模具在面团上按了一下，这就是 ExtrudeGeometry 做的事。
equivalent in RELAX NG. It supports schemas written in XML DTD, RELAX