uros-db commented on code in PR #15834:
URL: https://github.com/apache/iceberg/pull/15834#discussion_r3014905743


##########
format/spec.md:
##########
@@ -242,10 +242,12 @@ For `geometry` type, the CRS does not affect geometric 
calculations, which are a
 
 The default CRS value `OGC:CRS84` means that the objects must be stored in 
longitude, latitude based on the WGS84 datum.
 
-Custom CRS values can be specified by a string of the format 
`type:identifier`, where `type` is one of the following values:
-
-* `srid`: [Spatial reference 
identifier](https://en.wikipedia.org/wiki/Spatial_reference_system#Identifier), 
`identifier` is the SRID itself.
-* `projjson`: 
[PROJJSON](https://proj.org/en/stable/specifications/projjson.html), 
`identifier` is the name of a table property where the projjson string is 
stored.
+Non-defaullt CRS values are specified by any string that uniquely identifies 
coordinate reference system associated with this type.

Review Comment:
   ```suggestion
   Non-default CRS values are specified by any string that uniquely identifies 
coordinate reference system associated with this type.
   ```



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