characters. In a multiple-value item (a list), the values are
separated by semicolon characters.
-The available configuration items are described below.
+The available configuration items are described below. Non-absolute
+paths are presumed relative to `$HOME` for items in section
+**database**.
**database.path**
Notmuch will store its database here, (in
Default: For compatibility with older configurations, the value of
database.path is used if **database.mail\_root** is unset.
+**database.backup_dir**
+ Directory to store tag dumps when upgrading database.
+
+ History: this configuration value was introduced in notmuch 0.32.
+
+ Default: A sibling directory of the Xapian database called
+ `backups`.
+
**database.hook_dir**
Directory containing hooks run by notmuch commands. See