How to tell if XML element is marked as required in the XSD file

Question

I need to mark some elements as non required in the XSD schema. How do I go about figuring out which elements are marked as required, is there any particular flag I should be se

Answer 1

Yes.

minOccurs="0" is what you need to add to an element as optional.
Having no minOccurs attribute implies mandatory (since by default minOccurs="1")