wesm commented on a change in pull request #7502:
URL: https://github.com/apache/arrow/pull/7502#discussion_r445874451
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File path: format/Schema.fbs
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@@ -33,6 +33,35 @@ enum MetadataVersion:short {
V4,
}
+/// Represents Arrow Features that might not have full support
+/// within implementations. This is intended to be used in
+/// two scenarios:
+/// 1. A mechanism for readers of Arrow Streams
+/// and files to understand that the stream or file makes
+/// use of a feature that isn't supported or unknown to
+/// the implementation (and therefore can meet the Arrow
+/// forward compatibility guarantees).
+/// 2. A means of negotiating between a client and server
+/// what features a stream is allowed to use. The enums
+/// values here are intented to represent higher level
+/// features, additional details maybe negotiated
+/// with key-value pairs specific to the protocol.
+///
+/// Enums added to this list should be assigned power-of-two values
+/// to facilitate exchanging and comparing bitmaps for supported
+/// features.
+enum Feature : int {
Review comment:
agreed
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