Major Description
Introduce an xml-attribute element for gbean configuration to go with the existing attribute, reference and references elements. This is specified in the schema as an xml any element of a different namespace.
The ServiceConfigBuilder will get a reference collection of xml attribute builders that it will turn into a map from namespace to builder.
When processing an xml-attribute, the service builder will get the namespace of the embedded xml element, locate the appropriate xml attribute builder, and use that to get the value from the xml.
I'll provide a simple example javabean xml attribute builder that supports nested javabeans but not (yet) array valued properties (at least for the nested javabeans).