joellubi commented on code in PR #43234:
URL: https://github.com/apache/arrow/pull/43234#discussion_r1676373824


##########
go/arrow/extensions/bool8.go:
##########
@@ -0,0 +1,196 @@
+package extensions
+
+import (
+       "fmt"
+       "reflect"
+       "strconv"
+       "strings"
+
+       "github.com/apache/arrow/go/v17/arrow"
+       "github.com/apache/arrow/go/v17/arrow/array"
+       "github.com/apache/arrow/go/v17/arrow/memory"
+       "github.com/apache/arrow/go/v17/internal/json"
+)
+
+const ExtensionNameBool8 = "bool8"

Review Comment:
   There is no reason currently, but I did have a thought about how it could be 
used.
   
   Right now we have the functions `(Register|Unregister|Get)ExtensionType` for 
interacting with the global extension registry which developers can use to opt 
in to any extensions their application recognizes. As we make a clearer 
distinction between _regular_ extension types and canonical extension types, I 
was thinking that we could automatically pre-register extensions that are 
canonical so that applications automatically recognize them.
   
   Whether we do this or not, the exported name key could make it easier to 
interact with the registry using a consistent identifier.
   
   Thoughts?



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