Subject: What is Xml ?
Please can someone direct me to an authoritative explanation of what constitutes a valid XML file ?
I've been provided with some "XML" files which are a bit like this :
<element id="fileinfo" />
<element id="1" />
<element id="2" />
They are described as "XML", together with a note that "... file can be created using any XML editor providing the format and tags required are used", though I get various errors from emacs+nxml-mode, XmlMind and Serna.
I think that they are not well-formed, on account of having two "root nodes".
I'm also a bit surprised by the lack of the usual version, encoding and standalone attributes in the xml PI, though I suspect they are actually optional.
And I've just found that it starts with (hex) ef bb bf, before the "<?" - is that a byte-order mark ? Or just another non-standardness ?
I will need to pass this back to the originators so that they can either :
1. Change their software to produce/use real XML.
2. Change their documentation to refer to "XML-like" or similar.
In the meantime I'll need to do some sort of processing to get it into a form that I can process.
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