Xapian (and hence notmuch) prefixes are either **boolean**, supporting
exact matches like "tag:inbox" or **probabilistic**, supporting a more
flexible **term** based searching. Certain **special** prefixes are
Xapian (and hence notmuch) prefixes are either **boolean**, supporting
exact matches like "tag:inbox" or **probabilistic**, supporting a more
flexible **term** based searching. Certain **special** prefixes are
**phrases**. Phrases are indicated by double quotes (but beware you
probably need to protect those from your shell) and insist that those
unstemmed words occur in that order. One useful, but initially
**phrases**. Phrases are indicated by double quotes (but beware you
probably need to protect those from your shell) and insist that those
unstemmed words occur in that order. One useful, but initially