How to write ORG.OFFICE.EASTERSUNDAY for ODF 1.3 and pure EASTERSUNDAY for ODF 1.4?

[Regina Henschel]

Hi Calc experts,

it would be necessary to write ORG.OFFICE.EASTERSUNDAY when writing in 
ODF versions 1.3 and before and write pure EASTERSUNDAY in case of ODF 
1.4. But I see no way to distinguish between ODF 1.3 and ODF 1.4 in the 
export filter. I see only a general mxSymbols->isODFF() in 
ScCompiler::ParseOpCode().

Tips?

Kind regards,
Regina