i.e.

ad = {name: value, name2: value,
      !!descriptors = {name: type annotation}}

where ad is a map, there is no unmanaged ClassAd type

e.g.

ad = {"Owner": "nobody", "Requirements": "TRUE",
      !!descriptors = {"Requirements": "com.redhat.mrg.grid.Expression"}} 

On the C++ side, I will expect native types from cumin that I can query in the absence of a type descriptor.

e.g.,

switch (value.getType()) {
 case VAR_FLOAT: cout << value.asFloat() << endl; break;
 case VAR_UINT8: ...