• 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
  • Sample Data for Examples and Testing
  • Getting Started with Queries
  • Specifying the Nodes to Evaluate
  • Handling Strings and Text
  • Specifying Boolean Expressions and Functions
  • Specifying Number Operations and Functions
  • Comparing Values
  • Finding a Particular Node
  • Obtaining a Union
  • Obtaining Information About a Node or a Node Set
    • Obtaining the Name of a Node
    • Obtaining Namespace Information
    • Obtaining the URI for an Unparsed Entity
    • Determining the Number of Nodes in a Collection
    • Determining the Context Size
  • 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: Integrating with Third-Party File Systems
• Chapter 14: Extending Stylus Studio
• Chapter 15: Stylus Studio GUI Reference

Home > Online Product Documentation > Table of Contents > Determining the Context Size

Determining the Context Size

To obtain the number of nodes in the current context, call the last() function. The format is

number last() 
               

            

The last() function returns a number equal to the context size of the expression evaluation context. Essentially, the last() function returns the position number of the last node in document order for the current context. For example, the following query returns all books if there are three or more of them. There are three book elements in the current context. Consequently, this query returns three book elements.

/bookstore/book[last() >= 3]