<element name="julianReference" type="decimal">
<annotation>
<documentation>Julian date that corresponds to the reference date.
The Julian day numbering system is a temporal coordinate system that has an
origin earlier than any known calendar,
at noon on 1 January 4713 BC in the Julian proleptic calendar.
The Julian day number is an integer value;
the Julian date is a decimal value that allows greater resolution.
Transforming calendar dates to and from Julian dates provides a
relatively simple basis for transforming dates from one calendar to another.</documentation>
</annotation>
</element>
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