JavaServer Pages tags help you build hand-crafted, non-auto-generated rules for UI components.
While custom sections are sometimes necessary for specific features, using auto-generated sections in flow actions and harnesses is the best practice. Auto-generated rules may often provide better performance, greater security, greater levels of browser independence, and more consistent branding and styles than hand-crafted rules.
If your application rulesets contain HTML rules, use the Guardrails landing page to assess guardrail compliance. The Pega Platform JSP tag library contains tags that you can use in all stream rule types, including correspondence, as well as XML stream rules.
For more information, see JavaServer Pages tags.