切换文件扩展名就行，而且，如果有特定的方法支持它，那么就获得了新格式化的数据流。

Simply switch the filename extension, and, if the particular method supports it, you get a newly formatted data stream.

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Gzip压缩的svg文件应有扩展名. svgz，可由多数启用svg的工具直接支持。

Gzip compressed SVG files should have the extension.svgz, and are directly supported by most SVG-enabled tools.

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有其它扩展名的文档，如果它们属于受支持的类型，而且其文件扩展名更改为默认扩展名的话，也可打开。

Documents with other extensions can also be opened if they are of a supported type and their file extension are changed to one of the default extensions.

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