Mention that the "bucketed" directories are actually key-value stores.

1 files changed, 4 insertions, 3 deletions

diff --git a/doc/db.md b/doc/db.md
index 925891e..906350d 100644
--- a/doc/db.md
+++ b/doc/db.md
@@ -17,7 +17,7 @@ Data entries are stored together with three attributes:
 - leaf hash
 
   hash over specific parts of the entry, usually together with a
-  timestamp for use in a merkle tree
+  timestamp for use as a leaf in a merkle tree
 
 ## Storage in a file system
 
@@ -33,8 +33,9 @@ Two files (catlfish names in parentheses):
 
   filename is static, file contains one line per entry -- the leafhash
 
-Three directories, "bucketed" in three levels, one file per database
-entry (catlfish names in parentheses):
+Three key-value stores, implemented as "bucketed" directory trees with
+one file, named as the key, per database entry (catlfish names in
+parentheses):
 
 - entry (certentries)