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As an amateur software developer (I'm still in academia) I've written a few schemas for XML documents. I routinely run into design flubs that cause ugly-looking XML documents because I'm not entirely certain what the semantics of XML exactly are. My assumptions: <property> value </property> property = value <property attribute="attval"> value </property> A property with a special descriptor, the attribute. <parent> <child> value </child> </parent> The parent has a characteristic "child" which has the value "value." <tag /> "Tag" is a flag or it directly translates to text. I'm not sure on this one. <parent> <child /> </parent> "child" describes "parent." "child" is a flag or boolean. I'm not sure on this one, either. Ambiguity arises if you want to do something like representing cartesian coordinates: <coordinate x="0" y="1" /> <coordinate> 0,1 </coordinate> <coordinate> <x> 0 </x> <y> 1 </y> </coordinate> Which one of these options is most correct? I would lean towards the third based upon my current conception of XML schema design, but I really don't know. What are some resources that succinctly describe how to effectively design xml schemas?

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