- query:<name>
+- property:<key>=<value>
+
The **from:** prefix is used to match the name or address of the sender
of an email message.
available if notmuch is built with **Xapian Field Processors** (see
below).
+The **property:** prefix searches for messages with a particular
+<key>=<value> property pair. Properties are used internally by notmuch
+(and extensions) to add metadata to messages. A given key can be
+present on a given message with several different values.
+
Operators
---------
Xapian (and hence notmuch) prefixes are either **boolean**, supporting
exact matches like "tag:inbox" or **probabilistic**, supporting a more flexible **term** based searching. The prefixes currently supported by notmuch are as follows.
-+------------------+-----------------------+
-|Boolean |Probabilistic |
-+------------------+-----------------------+
-| **tag:** **id:** | **from:** **to:** |
-|**thread:** |**subject:** |
-|**folder:** |**attachment:** |
-|**path:** |**mimetype:** |
-| | |
-+------------------+-----------------------+
+
+Boolean
+ **tag:**, **id:**, **thread:**, **folder:**, **path:**, **property:**
+Probabilistic
+ **from:**, **to:**, **subject:**, **attachment:**, **mimetype:**
Terms and phrases
-----------------