+
+ The <b>mimetype:</b> prefix will be used to match text from the content-types
+ of MIME parts within email messages (as specified by the sender).
+
+ For <b>tag:</b> and <b>is:</b> valid tag values include <b>inbox</b> and <b>unread</b> by default
+ for new messages added by <b>notmuch</b> <b>new</b> as well as any other tag values
+ added manually with <b>notmuch</b> <b>tag</b>.
+
+ For <b>id:</b>, message ID values are the literal contents of the Message-ID:
+ header of email messages, but without the '<', '>' delimiters.
+
+ The <b>thread:</b> prefix can be used with the thread ID values that are gen‐
+ erated internally by notmuch (and do not appear in email messages).
+ These thread ID values can be seen in the first column of output from
+ <b>notmuch</b> <b>search</b>
+
+ The <b>path:</b> prefix searches for email messages that are in particular
+ directories within the mail store. The directory must be specified rel‐
+ ative to the top-level maildir (and without the leading slash). By
+ default, <b>path:</b> matches messages in the specified directory only. The
+ "/**" suffix can be used to match messages in the specified directory
+ and all its subdirectories recursively. <b>path:""</b> matches messages in
+ the root of the mail store and, likewise, <b>path:**</b> matches all messages.
+
+ The <b>folder:</b> prefix searches for email messages by maildir or MH folder.
+ For MH-style folders, this is equivalent to <b>path:</b>. For maildir, this
+ includes messages in the "new" and "cur" subdirectories. The exact syn‐
+ tax for maildir folders depends on your mail configuration. For
+ maildir++, <b>folder:""</b> matches the inbox folder (which is the root in
+ maildir++), other folder names always start with ".", and nested fold‐
+ ers are separated by "."s, such as <b>folder:.classes.topology</b>. For "file
+ system" maildir, the inbox is typically <b>folder:INBOX</b> and nested folders
+ are separated by slashes, such as <b>folder:classes/topology</b>.
+
+ Both <b>path:</b> and <b>folder:</b> will find a message if <u>any</u> copy of that message
+ is in the specific directory/folder.
+
+ The <b>date:</b> prefix can be used to restrict the results to only messages
+ within a particular time range (based on the Date: header) with a range
+ syntax of:
+
+ date:<since>..<until>
+
+ See <b>DATE</b> <b>AND</b> <b>TIME</b> <b>SEARCH</b> below for details on the range expression, and
+ supported syntax for <since> and <until> date and time expressions.
+
+ The time range can also be specified using timestamps with a syntax of:
+
+ <initial-timestamp>..<final-timestamp>
+
+ Each timestamp is a number representing the number of seconds since
+ 1970-01-01 00:00:00 UTC.
+
+ The <b>lastmod:</b> prefix can be used to restrict the result by the database
+ revision number of when messages were last modified (tags were
+ added/removed or filenames changed). This is usually used in conjunc‐
+ tion with the <b>--uuid</b> argument to <b>notmuch</b> <b>search</b> to find messages that
+ have changed since an earlier query.
+
+ The <b>query:</b> prefix allows queries to refer to previously saved queries
+ added with <a href='../notmuch-config-1/'>notmuch-config</a>(1). Named queries are only available if not‐
+ much is built with <b>Xapian</b> <b>Field</b> <b>Processors</b> (see below).
+
+ The <b>property:</b> 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.