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https://issues.apache.org/jira/browse/AVRO-2299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16756657#comment-16756657
 ] 

Doug Cutting commented on AVRO-2299:
------------------------------------

Maybe we need a canonicalizer that takes a sequence of property names as a 
parameter?
{code:java}
public static String canonicalize(Schema s, String[] properties);
public static String[] PARSE_PROPERTIES  = ["type", "name", ...];
public static String[] RESERVED_PROPERTIES = ["type", "name", ..., "default", 
"doc", ... ];{code}
 

This would print the schema filtered to contain only the named properties in 
the named order.

> Get Plain Schema
> ----------------
>
>                 Key: AVRO-2299
>                 URL: https://issues.apache.org/jira/browse/AVRO-2299
>             Project: Apache Avro
>          Issue Type: New Feature
>          Components: java
>    Affects Versions: 1.8.2
>            Reporter: Rumeshkrishnan
>            Priority: Minor
>              Labels: features
>             Fix For: 1.9.0, 1.8.2, 1.8.3, 1.8.4
>
>
> {panel:title=Avro Schema Reserved Keys:}
> "doc", "fields", "items", "name", "namespace",
>  "size", "symbols", "values", "type", "aliases", "default"
> {panel}
> AVRO also supports user defined properties for both Schema and Field.
> Is there way to get the schema with reserved property (key, value)? 
> Input Schema: 
> {code:java}
> {
>   "name": "testSchema",
>   "namespace": "com.avro",
>   "type": "record",
>   "fields": [
>     {
>       "name": "email",
>       "type": "string",
>       "doc": "email id",
>       "user_field_prop": "xxxxx"
>     }
>   ],
>   "user_schema_prop": "xxxxxx"
> }{code}
> Expected Plain Schema:
> {code:java}
> {
>   "name": "testSchema",
>   "namespace": "com.avro",
>   "type": "record",
>   "fields": [
>     {
>       "name": "email",
>       "type": "string",
>       "doc": "email id"
>     }
>   ]
> }
> {code}



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