Hello, I am using the XML plugin and every time I open files using the xsi namespace, errors are shown. Sample file : Error found : cvc-elt.4.2: Cannot resolve 'TransactionRequestType' to a type definition for element 'Transaction' This is just a sample, my real files use a custom namespace and schema, this schema validates ok but I always get the @xsi:type errors I also use Oxygen and these files and the @xsi:type are validated with no problem there. This only happens with the xsi namespace, not with other custom defined namespaces. I don't really know how to handle this. I have found that the xsi schema should be defined in the parser and can not be manually overriden, so I can't find a workaround for this... Thanks for any advice.