----------------------------------
Xapian (and hence notmuch) prefixes are either **boolean**, supporting
-exact matches like "tag:inbox" or **probabilistic**, supporting a most flexible **term** based searching. The prefixes currently supported by notmuch are as follows.
+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:** | |
+|**folder:** |**attachment:** |
+|**path:** |**mimetype:** |
| | |
+------------------+-----------------------+