Like filters, qualifiers are reserved keywords that reduce, or narrow, your search results. They allow you to find items by matching text in specific data elements. For example, you can find items with contract in the Subject field. Or, you can find items with bob.jones in the From field. Each qualifier acts on an individual word or phrase (e.g. subject:contract, from:bob.jones). Qualifiers can be combined with other qualifiers, words, phrases, Boolean logic and filters to narrow a search to find exactly the items you want. To apply a qualifier to your search request, use it as a prefix to one of the operands in a Boolean logic algebraic structure. For more information, see Advanced Search.
Tip: To invert the effect of a qualifer, precede it with the NOT operator.