RussellSpitzer commented on code in PR #14888:
URL: https://github.com/apache/iceberg/pull/14888#discussion_r2635377510


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docs/docs/schemas.md:
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@@ -34,9 +34,16 @@ Iceberg tables support the following types:
 | **`time`**         | Time of day without date, timezone                      
                 | Stored as microseconds                           |
 | **`timestamp`**    | Timestamp without timezone                              
                 | Stored as microseconds                           |
 | **`timestamptz`**  | Timestamp with timezone                                 
                 | Stored as microseconds                           |
+| **`timestamp_ns`**     | Timestamp without timezone, nanosecond precision    
                     | Stored as nanoseconds; added in v3               |
+| **`timestamptz_ns`**   | Timestamp with timezone, nanosecond precision       
                     | Stored as nanoseconds; added in v3               |
 | **`string`**       | Arbitrary-length character sequences                    
                 | Encoded with UTF-8                               |
+| **`uuid`**             | Universally unique identifiers                      
                     | Should use 16-byte fixed                         |

Review Comment:
   I wonder if the note here should just like out to the UUID RFC 
https://datatracker.ietf.org/doc/html/rfc9562.html, I'd also be ok with no note 
here.



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