rdblue commented on code in PR #17198:
URL: https://github.com/apache/iceberg/pull/17198#discussion_r3815191223


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format/spec.md:
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@@ -1062,7 +1064,7 @@ Scan predicates are also used to filter data and delete 
files using column bound
 
 Data files that match the query filter must be read by the scan.
 
-Note that for any snapshot, all file paths marked with "ADDED" or "EXISTING" 
may appear at most once across all manifest files in the snapshot. If a file 
path appears more than once, the results of the scan are undefined. Reader 
implementations may raise an error in this case, but are not required to do so.
+Duplicate live manifest entries for the same content file violate [content 
file uniqueness](#content-file-uniqueness). When duplicate live entries are 
present, table behavior (including scan results) is undefined. Reader 
implementations may raise an error but are not required to do so.

Review Comment:
   This looks good to me.



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