Remove the minOccurs="0"
on the xsd:sequence
elements (3x) in your XSD and it will work in Mendix. Removing this in your XSD won't actually change the XML documents described by the schema at all, since all child elements are already optional.
Some XML schema structures are not accepted by Mendix, as they cannot be used by the XML-to-Domain mapping. A good example is xsd:choice
, but also xsd:sequence
with minOccurs="0"
cannot be used.