Hey Xingen,
> 1. Does the json schema support extends? e.g. First, I define an > general-purpose json schema named "Object", and in other json schema, try to > extends this "Object". > Avro IDL supports includes: http://avro.apache.org/docs/current/idl.html#imports. It does not support extensions, to the best of my knowledge. Perhaps you could file a feature request at https://issues.apache.org/jira/browse/AVRO? > 2. In the primitive types, I can't find one type that can represent any > objects. I tried "record", but you have to specify "name" and "fields" for > it. > You could make a union of all of the primitive types? I'm not sure exactly what you're trying to accomplish with this question though. Thanks, Jeff
