Supported by the National Natural Science Foundation of China under Grant No.60432010 (国家自然科学基金); the National Basic Research Program of China under Grant No.2007CB307100 (国家重点基础研究发展计划(973)); the China Next Generation Internet under Grant No.CNGI-04-14-1T (中国下一代因特网)
基于位置的服务被认为是继短信之后电信增值业务发展的下一次高潮,在前期所提出的一种面向电信增 值业务领域的流程描述语言XPL(extended-calling process language)的基础上,进一步提出了一种描述地理信息服务 的语言GDL(geography description language),GDL 可以和XPL 配合使用,共同描述基于位置的电信服务.XPL 和 GDL具有抽象层次高,使用灵活简单,开发业务速度快的特点.还介绍了支持XPL 和GDL的业务生成系统.该业务生 成系统基于SOA(services-oriented architecture,面向服务的构架),适用于网络融合条件下的业务生成.
The location-based services is considered to be the next climax of the telecom value-added services after the SMS (short message system). This paper introduces a service flow describing language XPL (extended-calling process language) which mainly focuses on the value-added service in telecom field before. This paper presents a geography information service describing language GDL (geography description language) based on the prior work. XPL and GDL have the ability to describe LBS-oriented telecom services in coordination. Those languages have high level in abstractness, and they can be easily used and are fast at developing service. This paper also presents the supporting system of those languages. Due to the basis of SOA (services-oriented architecture), the supporting system suits the service creation under the condition of net merging.