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cvc-datatype-valid.1.2.1: '' is not a valid value for 'date'


The WSDL of a webservice in our PI system describes the field "birthdate" as optional, data type is "xs:date". Validation is active on PI.

When I now send the following XML, I get the error message "cvc-datatype-valid.1.2.1: '' is not a valid value for 'date'":




Other formats don't work either:


<birthdate />


Only if I remove the element completely it is processed correctly. I tried to add a XSL script to remove empty tags but the validation is run before, so there is no chance for me to fix it.

Anything I can do about this?

Thanks for help.


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