最近几年来，地理信息系统无论是在理论上还是应用上都处在一个飞速发展的阶段。 GIS被应用于多个领域的建模和决策支持，如城市管理、区划、环境整治等等，地理信息成为信息时代重要的组成部分之一； “数字地球”概念的提出，更进一步推动了作为其技术支撑的GIS的发展。 与此同时，一些学者致力于相关的理论研究，如空间感知、空间数据误差、空间关系的形式化等等。 这恰好说明了地理信息系统作为应用技术和学科的两个方面，并且这两个方面构成了相互促进的发展过程。
The W3C allows everyone to share resources on the Internet.
W3C (World Wide Web Consortium, World wide Web Consortium), also known as the W3C Council, is the main international standards organization of the World wide Web.
Start learning W3C! 4.1.1. W3C tutorial list ¶
W3C brief introductionThis section: what is the W3C organization, how it works, and how the network is standardized.W3C processThis section: W3C standardization process.W3C HTMLThis section: a brief introduction to the W3C HTML.W3C XHTMLThis section summarizes the W3C XHTML activities.W3C XMLThis section summarizes the W3C XML activities.W3C CSSThis section summarizes the W3C CSS activities.W3C XSLThis section summarizes W3C’s XSL activities.W3C XML SchemaThis section summarizes the W3C XML Schema activities.W3C XPathThis section summarizes the W3C XPath activities.W3C XQueryThis section summarizes the W3C XQuery activities.W3C DOMThis section summarizes the W3C DOM activities.W3C SOAPThis section summarizes the W3C SOAP activities.W3C WSDLThis section summarizes the W3C RDF activities.W3C RDFThis chapter summarizes the RDF activities at the W3C.W3C OtherThis section summarizes other W3C activities.