RussellSpitzer commented on code in PR #14888:
URL: https://github.com/apache/iceberg/pull/14888#discussion_r2646134416


##########
docs/docs/schemas.md:
##########
@@ -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  
 | **`fixed(L)`**     | Fixed-length byte array of length L                     
                 |                                                  |
 | **`binary`**       | Arbitrary-length byte array                             
                 |                                                  |
+| **`variant`**          | Semi-structured data (JSON-like)                    
                     | Added in v3                 |
+| **`geometry(C)`**      | Geospatial features with CRS parameter              
                     | Planar kernel; added in v3                 |

Review Comment:
   @jiayuasu Does Kernel fit here? I know you are the expert here and this was 
just my guess



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