rdblue commented on code in PR #16025:
URL: https://github.com/apache/iceberg/pull/16025#discussion_r4150271695
##########
format/spec.md:
##########
@@ -676,13 +700,19 @@ A manifest file must store the partition spec and other
metadata as properties i
| _optional_ | _required_ | `format-version` | Table format version
number of the manifest as a string
|
| | _required_ | `content` | Type of content files
tracked by the manifest: "data" or "deletes"
|
+=== "v4"
+ | Requirement | Key | Value
|
+
|-------------|---------------------|---------------------------------------------------------------------------------------------------------------------------------------------|
+ | _optional_ | `schema-id` | ID of the schema used to write the
manifest as a string
|
+ | _optional_ | `format-version` | Table format version number of the
manifest as a string
|
+
#### Content file uniqueness
Within a snapshot, each content file must be referenced by at most one live
manifest entry across all manifests; otherwise, the snapshot has undefined
behavior. Writers should not produce multiple manifest entries for the same
content file in a snapshot (for example, both ADDED and DELETED entries for the
same file). Writers are not required to validate uniqueness at commit time.
-#### Manifest Entry Fields
+#### Entries in Manifests
Review Comment:
Manifest Schema?
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