1. Many boolean operators return 1 for true and the empty-string for false. 2. I assume Boolean operators & wild cards are not available for Wikipedia searches, right? 3. Is there any chance that categories could one day be combined with boolean operators ? 4. The boolean operators and and or use minimal evaluation. 5. Results of previous queries can be referred to by number and combined via boolean operators . 6. Specifically, the boolean operators have been lifted to support ternary logic thus keeping impedance with SQL. 7. Another example is George Boole's Boolean operators . 8. Thus, natural number addition, subtraction etc . are provided, as are Boolean operators such as equality and inequality. 9. Advanced Search with additional Boolean Operators is available for both Collections and images by language and by multiple fields. 10. Buildings are decomposed into a set of simple primitives that are reconstructed individually and are then combined by Boolean operators .
