How to create DTD(document type definition) for printer language?

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I want to create DTD(document type definition) for data matrix printer language. I want to define contents like barcode, line, box, x-axis, y-axis position etc. Can anyone help?

Posted 22-May-15 19:35pm

Superdude Rahul

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-05-23T17:24:00

This is not really a question. The answer would be: learn XML and implement all you want. You did not explain any particular concerns. You did not tell us anything about your language design, requirements, nothing like that.

Please see:
http://www.w3.org/TR/REC-xml[^],
http://www.w3.org/TR/REC-xml/#sec-prolog-dtd[^],
http://www.w3.org/TR/REC-xml/#sec-rmd[^],
http://www.w3.org/XML/1998/06/xmlspec-report-v21.htm[^].

But I have another idea. There is a newer way of describing the XML metadata, XML Schema:
http://en.wikipedia.org/wiki/XML_Schema_(W3C)[^],
http://www.w3.org/standards/xml/schema[^].

Frankly, DOCTYPE is ugly language with a lot of limitations. Its description in W3 standards is hard from perfect. It's hard or almost impossible to find a good DOCTYPE parser; and this is probably because its use is limited.

In contrast to that, XML schema is itself written in XML, so it can be parsed by many different tools; some of them are semantic-aware. There are enough of schema validation tools (validating XML against the schema). And the schema has much better expressive power, is much more flexible.

—SA