Information Retrieval Service Z39.50-1995: An ANSI/NISO standard (cont.)
Z39.50 Facilities: Search: Query Types
- Type 1 queries support Reverse Polish Notation/Post Fix Notation and the operators: AND, OR, and NOT. - (su:oil and (su:pollution or su:contamination)) and au:johnson
- Type 101 queries support Type 1 Queries + Proximity Operators: WITH, NEAR—allows proximity searching and restriction of result sets by attributes. - su: plan n1 attack
- Type 0 is a private, local query type established between server and client outside of the standard.