Schema for describing any kind of messages. Namespace of the generated class. Resources stream for messages. Will get namespace prepended to it. Name of the generated class. Name of the generated container class. Name of the base container class. Optional message level for this container class and derivative classes. Name of the message type. Override the number for this message type. Associate SourceLineNumbers with this message. The default value is "yes". Type of the parameter. Name of the parameter. Values of this type will either be "yes" or "no". The message level for this message which corresponds to the WixToolset.MessageLevel enumeration.