• Chapter 1: Getting Started with Stylus Studio®
• Chapter 2: Editing and Querying XML
• Chapter 3: Converting Non-XML Files to XML
• Chapter 4: Working with XSLT
• Chapter 5: Creating XSLT Using the XSLT Mapper
• Chapter 6: Debugging Stylesheets
• Chapter 7: Defining XML Schemas
• Chapter 8: Defining Document Type Definitions
• Chapter 9: Writing XPath Expressions
  • About the XPath Processor
  • Using the XPath Query Editor
  • Sample Data for Examples and Practice
  • Getting Started with Queries
  • Specifying the Nodes to Evaluate
  • Handling Strings and Text
  • Specifying Boolean Expressions and Functions
    • Using Boolean Expressions
      • Case Sensitivity
      • Examples
    • Calling Boolean Functions
  • Specifying Number Operations and Functions
  • Comparing Values
  • Finding a Particular Node
  • Obtaining a Union
  • Obtaining Information About a Node or a Node Set
  • Using XPath Expressions in Stylesheets
  • Accessing Other Documents During Query Execution
  • XPath Quick Reference
• Chapter 10: Working with XQuery in Stylus Studio
• Chapter 11: Composing Web Service Calls
• Chapter 12: Accessing Relational Data as XML
• Chapter 13: Building XML Pipelines
• Chapter 14: Publishing XML Data
• Chapter 15: Integrating with Third-Party File Systems
• Chapter 16: Extending Stylus Studio
• Chapter 17: The Stylus Studio Java API
• Chapter 18: Stylus Studio GUI Reference

Home > Online Product Documentation > Table of Contents > Using Boolean Expressions

Using Boolean Expressions

You can specify Boolean expressions in the subqueries in filters. You specify the Boolean AND, OR, and NOT operators like this:

You can use parentheses to group collection specifications and operators for clarity or where the normal precedence is inadequate to express an operation.

Case Sensitivity

Operators are case sensitive. Spaces are not significant. You can omit them or include them for clarity.

Examples

The following query returns all authors who have at least one degree and one award:

author[degree and award] 
               

            

The next query finds all authors who have at least one degree or award and at least one publication:

author[(degree or award) and publication] 
               

            

Following is a query that finds all authors who have at least one degree and no publications:

author[degree and not(publication)]