rayokota commented on pull request #869:
URL: https://github.com/apache/avro/pull/869#issuecomment-621271223


   @RyanSkraba , yes, it is to be able to write nested schemas only by name, 
instead of inlining them.   Currently in 
https://github.com/confluentinc/schema-registry/issues/1432 I am having to 
place my code in the `org.apache.avro` package because this functionality is 
available, but is package-private.
   
   The motivation behind this is that with Schema Registry, we have a very 
large customer who wants to be able to evolve and version nested schemas 
independent of the root schema.  In order to do this, the latest versions of 
nested schemas will be added to the `Parser` dynamically.  So the root schema 
should not contain the inline nested schemas, but only refer to them by name.
   
   Below is an example of output of this method, given nested or referenced 
schemas with name `acme.Product`.  Note that only the name is generated rather 
than the `acme.Product` schema be generated inline.
   
   ```
   {
    "type": "record",
    "namespace": "acme",
    "name": "order",
    "fields": [
        {"name": "order_id", "type": "string"},
        {"name": "order_date", "type": "string"},
        {
           "name": "product",
           "type": "acme.product"
        }
    ]
   }
   ```


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