Artifact type is defined as an abstract type in the topology schema.
工件类型被界定为拓扑方案中一个抽象的类型。
By declaring an element or type to be abstract, XML Schema provides a mechanism to force substitution for it.
通过声明抽象的元素或者类型，XMLSchema提供了一种强制替换机制。
In the XML schema type definition section of the WSDL document, there is an abstract complex type defined for com.example.Message.
在WSDL文档的XMLschema类型定义部分，有一个为com . example . Message定义的抽象复杂类型。
In the XML schema type definition section of the WSDL document, there is an abstract complex type defined for com.example.Message.
在WSDL文档的XMLschema类型定义部分，有一个为com . example . Message定义的抽象复杂类型。
应用推荐