Assume we have the following element: <xs:element name='date' type='xs:date' dfdl:calendarPattern='yyyy-MM-dd hh:mm' /> So we have a element of type xs:date, but a calendarPattern that specifies date and time formatting symbols. What should happen in this case? Two potential options that I see (there are probably others): 1) Throw some kind of error, signifying that calendarPattern contains formatting symbols not allowed for the type. 2) Truncate the parsed data to fit the type, so the data 2013-01-22 11:59 becomes <date>2013-01-22</date> This seems reasonable, however the spec mentions the following: When unparsing, and property calendarPattern contains a formatting symbol that requires a component of the date/time and the infoset value does not contain that component, it is a processing error. So that means it is impossible to unparse when the calendar pattern is a superset of the element type. Is this ok? Thoughts? - Steve