Explicitly state which calendar Date and DateTimeOffset use

Follow XML Schema 1.1 - http://www.w3.org/TR/xmlschema11-2/#dateTime - and use the proleptic Gregorian calendar, allowing the year zero and negative years. Accepted: https://www.oasis-open.org/committees/download.php/48752/odata-meeting-31_on-20130404-minutes.html#odata-318

https://www.oasis-open.org/committees/download.php/48835/odata-core-v4.0-wd01-part3-csdl-2013-04-12.doc https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/schemas/edm.xsd?rev=231 https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/ABNF/odata-abnf-construction-rules-v4.0-wd01.txt?rev=231 https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/ABNF/odata-abnf-testcases.xml?rev=231 Accepted: https://www.oasis-open.org/committees/download.php/49026/odata-meeting-34_on-20130425_26-F2F-minutes.html#odata-318