---
title: Patterns and PingGateway
description: Patterns in configuration parameters and expressions use the standard Java regular expression Pattern class. For more information on regular expressions, refer to Oracle's tutorial on Regular Expressions.
component: pinggateway
version: 2026
page_id: pinggateway:reference:Patterns
canonical_url: https://docs.pingidentity.com/pinggateway/2026/reference/Patterns.html
revdate: 2026-01-20T12:00:00Z
section_ids:
  Patterns-template: Pattern templates
  Patterns-moreinfo: More information
---

# Patterns and PingGateway

Patterns in configuration parameters and expressions use the standard Java regular expression [Pattern](https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/regex/Pattern.html) class. For more information on regular expressions, refer to Oracle's [tutorial on Regular Expressions](https://docs.oracle.com/javase/tutorial/essential/regex/index.html).

## Pattern templates

A regular expression pattern template expresses a transformation to apply for a matching regular expression pattern. It may contain references to [capturing groups](https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/regex/Pattern.html#cg) within the match result. Each occurrence of `$g`, where *g* is an integer value, is substituted by the indexed capturing group in a match result. Capturing group zero `"$0"` denotes the entire pattern match. A dollar sign or numeral literal immediately following a capture group reference can be included as a literal in the template by preceding it with a backslash (`\`). Backslash itself must be also escaped in this manner.

## More information

Java [Pattern](https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/regex/Pattern.html) class

[Regular Expressions tutorial](https://docs.oracle.com/javase/tutorial/essential/regex/index.html)