Design and implementation of the video content description tool: According to description Definition Language (DDL), this paper gives a content description tool based on the MPEG-7 standard.

视频内容描述工具的设计和实现：根据描述定义语言，建立基于MPEG - 7标准的视频内容描述工具。

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In a Web Services Description Language (WSDL) interface model (portType definition) this input criteria and output criteria map to operation input message and output message respectively.

在Web Services Description Language (WSDL)接口模型(porttype定义)中，这个输入标准和输出标准分别映射到操作的输入和输出消息。

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However, a valid schema does not necessarily mean that it is also valid for a particular Web Service Description Language (WSDL) definition.

不过，有效的模式并不一定意味着其对特定的Web服务描述语言(Web Service Description Language, WSDL)定义也有效。

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