https://www.w3.org/TR/xmlschema-2/#built-in-datatypes
http://www.xml.com/pub/a/2001/08/22/easyschema.html -> best article
That leaves us with  with , which ensures that there will not be any data content in the element.

  
     -> the default syntax for complex types is complex content that restricts anyType
    
  








  
    
      
        
      
    
  



  

http://stackoverflow.com/questions/5457217/xsd-for-simplecontent-with-attribute-and-text
Apparently, you can't restrict simpleContent within a complexType, only extend it.

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