Determine Dependencies

Data may contain dependencies such as:

• If there is an element AA, there must be an element BB
• Elements XX and ZZ are mutually exclusive
• There can only be a UU if there has already, somewhere earlier, been a QQ
• If the value of the ìtypeî attribute is ìotherî then you must give a value for the ìnew-typeî attribute as well as create an Exception element