A full-text query string.
When creating a query, list search terms separated by spaces, in the form <userinput>term1 term2 term3</userinput>. (As with all of the query parameter values, the spaces must be URL encoded.) The service returns all entries that match all of the search terms ( like using AND between terms). Like Google's web search, a service searches on complete words (and related words with the same stem), not substrings.
To search for an exact phrase, enclose the phrase in quotation marks: <userinput>"exact phrase"</userinput>.
To exclude entries that match a given term, use the form <userinput>-term</userinput>.
The search is case-insensitive.
Example: to search for all entries that contain the exact phrase "Elizabeth Bennet" and the word "Darcy" but don't contain the word "Austen", use the following query: <userinput>"Elizabeth Bennet" Darcy -Austen</userinput>.