Often, however, a single URI is not enough; what's really needed is a way to describe a namespace using multiple resources, including DTDs, XML Schemas, XSL stylesheets and software documents.

但通常仅仅一个URI还不够，实际上我们需要一种办法使用多种资源来描述名称空间，包括DTD、XML模式、xsl样式表和软件文档。

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The software documents should be submitted to customers in fact, completely and effectively;

按合同规定向客户提供真实、完整、有效的软件资料。

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Software documents are very important components of airborne equipment software.

软件文档是航空机载设备软件的重要组成部分。

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The general rule is that you can upgrade your Microsoft software without losing the ability to use the related software and documents that that previous version was working with.

FORBES: What Is So Great About Microsoft?

Consumers often care about backward compatibility as well, but it is even more important for businesses since they typically have made much bigger investments in related software, documents, documentation, training, and so on.

FORBES: What Is So Great About Microsoft?

Users of previous versions of Office will need to install free software to read documents in the new file formats.

ECONOMIST: Microsoft's latest upgrades should make PC users happier