Technical reference manual



Do's and Don'ts for Learning Providers
  • DO refer to this manual when in doubt about the usage or meaning of an element or attribute;
  • DO download the most recent XSD in case the manual is unclear about an element or attribute;
  • DO use the Feedback button when such unclarity occurs;
  • DO validate newly created code using the EDU-DEX validator at

  • DON'T use a DOCTYPE declaration: a mixture of DTD and XSD leads to ambiguity;
  • DON'T add attributes to elements that are not defined in the XSD; they might be syntactically legal (e.g. xsi based attributes) but could lead to conflicts with the XSD, and hence are not accepted by the EDU-DEX validator.

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Updated 2020-07-09, Version, MySql 5.6.42-log, PHP 7.2.32