At least in Java, my understanding is that non-primitive type names are global 
to that schema file so you could use approach 1, but instead of defining all 
types at the root union, define them at the first subschema use and then refer 
to their type by name in the rest of the use cases. Disclaimer: It's been a 
long time since I tried this so I could be wrong.

Hope this helps.Sam 

    On Friday, July 7, 2017 11:22 AM, Shannon Carey <[email protected]> wrote:
 

  I'm trying to see if I can use a single Avro schema file but still have 
multiple record & enum types re-used throughout different places in the schema.
Based on these answers 
https://stackoverflow.com/questions/21539113/can-i-split-an-apache-avro-schema-across-multiple-files
 and 
https://stackoverflow.com/questions/29280635/avro-schema-definition-nesting-types
 the only two ways are:
1. Use a union as the root type, and define all your re-used types as members 
of the union. Unfortunately, this approach is not ideal as it allows any of 
those types to be serialized as the root object regardless of which types you 
want to be the root.
Or, 2. Define a Protocol instead of a Schema, putting all your types into 
"types". This appears to have the same problem as #1.
Is that right? Is there any other way? I'd rather only have to reference one 
schema file instead of multiple.
Thanks,Shannon

   

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