rdblue commented on code in PR #16727:
URL: https://github.com/apache/iceberg/pull/16727#discussion_r3399170051


##########
format/udf-spec.md:
##########
@@ -117,8 +117,14 @@ following fields required. Any other fields must be 
ignored.
   e.g., `{ "type": "struct", "fields": [ { "name": "id", "type": "int" }, { 
"name": "name", "type": "string" } ] }`
 
 #### Definition ID
-The `definition-id` is a canonical string derived from the parameter types, 
formatted as a comma-separated list with no
-spaces. Each type uses the following string representation:
+The `definition-id` is a string that uniquely identifies a definition within 
the UDF metadata. It may be a user-specified

Review Comment:
   I think it would be fine to add an optional `specific-name` but I don't see 
a reason to change how `definition-id` works. That is derived from the 
parameters and I don't see a reason to change it.



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