+ ``--include=(config|properties|tags)``
+
+ Control what kind of metadata is included in the output.
+
+ **config**
+
+ Output configuration data stored in the database. Each line
+ starts with "#@ ", followed by a space separated key-value
+ pair. Both key and value are hex encoded if needed.
+
+ **properties**
+
+ Output per-message (key,value) metadata. Each line starts
+ with "#= ", followed by a message id, and a space separated
+ list of key=value pairs. pair. Ids, keys and values are hex
+ encoded if needed.
+
+ **tags**
+
+ Output per-message boolean metadata, namely tags. See *format* above
+ for description of the output.
+
+ The default is to include all available types of data. The
+ option can be specified multiple times to select some subset. As
+ of version 2 of the dump format, there is a header line of the
+ following form
+
+ |
+ | #notmuch-dump <*format*>:<*version*> <*included*>
+
+ where <*included*> is a comma separated list of the above
+ options.
+