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Element content

Non-empty elements.

I have a basic XML document which references a DTD.  The document may have some tags as follows;

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE StaffReport SYSTEM "file:/opt/app/java/staff.dtd">

Is it possible within the DTD to specify that certain elements cannot be empty?  For example, in the sample XML above, I would like <MiddleName></MiddleName> to be valid, as a middle name is not required, but <Surname></Surname> not valid, as a surname is required.  Can I do this or do I need to explicity test for the tag name and length when pasring the document using SAX?

Any help appreciated?



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