When validating DataCite XML against our schema XSD, sometimes errors are generated that are confusing because they do not take into account case sensitivity.
e.g.
"[facet 'enumeration'] the value 'personal' is not an element of the set {'organizational', 'personal'}. at line 6, column 0"
Which of course looks werird, the problem here is the enumeration for nameType here is actually "Organisation" and "Personal"