alamb commented on code in PR #6472:
URL: https://github.com/apache/arrow-datafusion/pull/6472#discussion_r1209255118


##########
docs/source/user-guide/example-usage.md:
##########
@@ -81,6 +81,26 @@ async fn main() -> datafusion::error::Result<()> {
 +---+--------+
 ```
 
+## Arrow Versions
+
+Many of DataFusion's public APIs use types from the
+[`arrow`](https://docs.rs/arrow/latest/arrow/) crate, so if you use
+`arrow` in your project, its version must match that used by
+DataFusion.
+
+The easiest way to ensure the versions match is to use the `arrow`
+exported by DataFusion, for example:

Review Comment:
   Thanks! I tried to clarify in e420deb04 -- let me know how if that makes it 
clearer. 



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