DC 12.1 | Pattern Matching and Action Statements

User Guide > Using Content Extraction Language > Pattern Matching and Action Statements

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Pattern Matching and Action Statements

The following topics provide information about pattern matching and action statement:

• CXL Patterns

• Expressions in Patterns

• Regular Expression

• Metacharacters

• Comparison Expressions

• Actions and Statements

• Expressions in Statements

• Comment Statements

• Assignment Statements

• Catchup Statements

• Control Statements

• Output Statements

The main part of a script is a sequence of pattern-action statements.

Pattern { action statements }

Pattern { action statements }

The pattern comes first, and then the action. Either the pattern or action may be missing in a statement. If the pattern is missing, the action will be executed for every single input line. A pattern with a missing action does nothing. Since the pattern or action may be missing, action statements are enclosed in {and} to distinguish them from patterns.

Last modified date: 02/09/2024