Service is the key layer of SOA. It provides a framework for the Web Service. Based on the framework,the smart home system can achieve cross-platform service access. However,most of the service description and communication provided by the SOA such as SOAP,UDDI and WSDL are lack of semantic information during the retrieval process,and they cannot effectively deal with polysemy,synonymy and other grammatical problems. Through introducing the ontology technology,smart family service domain ontologies are built. The semantic annotations of services,content and equipment are implemented respectively based on function concept ontology, content ontology and device ontology. The process of services discovery is divided into three phases: function retrieval, service filtering and parameter matching. It can provide semantic-based intelligent smart home services discovery.%SOA的关键是服务,它为Web Service提供了一个架构,使用该架构组织家庭服务可以实现跨平台的服务访问.然而SOA架构大多数规范如SOAP、UDDI和WSDL等均是基于XML的,所描述的服务缺乏语义信息,因此在检索过程无法有效处理一词多义和多词一义等语法问题.通过引入本体技术,建立家庭服务领域本体,从服务的功能、内容和设备三个方面利用功能概念本体、内容本体和设备本体进行语义标注,并扩展WSDL为S-WSDL来描述家庭服务.基于本体的家庭服务发现过程分为三个阶段:查找功能、过滤服务和参数类型匹配,充分利用本体的语义优势实现了智能数字家庭服务发现.
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