卡沃尔（创造一个愿景的现实）是组件的一个引擎/收集

代码说明：

CAVOR (Creating A Vison Of Reality) is an engine/collection of components for building apps that combine geospatial or graphic data with a database of attributes (properties). Examples include GIS, CAD, CASE, etc. It is free software released under the GNU General Public License. See also included documents and/or the web pages (see above)