As we have seen, grammar can also come from a file or from an internal text string.
正如我们所见，文法可以来自一个文件或来自一个内部的文本字符串。
2
After generating the QDML file from a DTD grammar I had to edit the file to define the document root element and add type information for non-String values (a couple of ints, in this case).