大部分字符与自身匹配，大部分元字符必须使用反斜杠(\)进行转义。

Most characters match themselves, and most metacharacters must be escaped using a backslash (\). The fundamental operations are.

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有些字符(在URI引用中)必须使用URI约定来转义，而其它则使用前面带有反斜杠的N - Triples约定。

Some characters (in URI references) must be escaped using URI conventions, and others use an N-Triples convention with a leading backslash.

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