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-rw-r--r--Documentation/technical/reftable.md5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/technical/reftable.md b/Documentation/technical/reftable.md
index 34f752950d..47c61a350d 100644
--- a/Documentation/technical/reftable.md
+++ b/Documentation/technical/reftable.md
@@ -243,6 +243,7 @@ its value(s). Records are formatted as:
varint( prefix_length )
varint( (suffix_length << 3) | value_type )
suffix
+ varint( update_index_delta )
value?
The `prefix_length` field specifies how many leading bytes of the
@@ -258,6 +259,10 @@ Recovering a reference name from any `ref_record` is a simple concat:
The `suffix_length` value provides the number of bytes available in
`suffix` to copy from `suffix` to complete the reference name.
+The `update_index` that last modified the reference can be obtained by
+adding `update_index_delta` to the `min_update_index` from the file
+header: `min_update_index + update_index_delta`.
+
The `value` follows. Its format is determined by `value_type`, one of
the following: