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DTD: how to set ELEMENT format (e.g. date)?

416044Mar 19 2004 — edited Mar 19 2004

How can i define an element in a DTD so that it's values must conform to a date syntax, e.g. "yyyy-MM-dd"?

<!ELEMENT changedat (#PCDATA)>

is the usual definition, but that just says that an element <changedat> has string characters. Are there any additional parameters you can set in the DTD so that the element values are checked for specific formats?

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Locked on Apr 16 2004

Added on Mar 19 2004

#java-technology-xml

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