loext namespace in ODF strict

[Regina Henschel <rb.henschel@xxxxxxxxxxx>]

Hi all,

with ODF 1.4 we get an attribute draw:extrusion-metal-type. Its value is 
a QName. The default value is 'draw:MetalODF' and the value we use for 
MS compatibility is 'loext:MetalMSCompatible'. Using 
'draw:MetalMSCompatible' is not allowed.

Currently validation fails, because loext is not registered as namespace 
prefix in ODF strict and thus 'loext:MetalMSCompatible' is no valid QName.

It will be detected as valid QName, when I move
        mpNamespaceMap->Add(
                GetXMLToken(XML_NP_LO_EXT), GetXMLToken(XML_N_LO_EXT),
                XML_NAMESPACE_LO_EXT);
up from the "extended" section to the "strict" section in 
SvXMLExport::InitCtor_() in xmloff/source/core/xmlexp.cxx.

But I'm not sure, whether that is the correct place to solve the problem.

Is there a way to add a namespace when it is actually needed? I mean to 
add it when a shape uses this attribute?

Kind regards,
Regina