是xsi:前缀在XML中是已知的吗? [英] is the xsi: prefix assumed to be known in XML?

问题描述

在使用XML解析器时，我看到许多使用xsi:schemaLocation属性的XML文件，而没有声明xsi命名空间.

Working on an XML parser, I see a lot of XML files using the xsi:schemaLocation attribute without declaring the xsi namespace.

是错误还是有规范说明假定在解析之前知道该错误?对"xsi"的名称空间规范一无所获，但结果可能在另一个文档中.

Is it an error or is there a spec stating it is assumed to be known before parsing? Grepping the namespaces spec for "xsi" gives no results, but maybe the answer is in another document.

推荐答案

不能假定[XML命名空间以外的]命名空间是已知的.

No namespaces [other than the XML namespace] can be assumed to be known.

如果文档包含xsi前缀，则还应该有一个关联的名称空间(通常为xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance").

If a document contains an xsi prefix, there should also be an associated namespace (which would normally be xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance").

如果未声明名称空间，则XML文件无效.

If the namespace is not declared, the XML file is not valid.

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