# Nested patterns One of the most powerful ideas behind template systems like [Patterns](/version-1.x-beta/architecture/patterns.md) is the ability to include patterns within patterns, this opens many new ways of organizing and re-using your code. Maybe the first idea that comes to mind is to put the header and the footer of your HTML document in two separate patterns because they're almost always the same in all the pages of your website. Let's do it. Let's assume you save the header for your pages in a pattern called `header.html`, and it looks like this: ```markup ``` And your footer.html looks like this: ```markup ``` Then, you simply include those patterns in your main pattern. Because patterns have access to the Cherrycake engine, this is done by simply calling the [Patterns::parse ](/version-1.x-beta/reference/core-modules/patterns/methods.md#parse)method you already know of, but this time inside your pattern: ```markup Patterns->parse("header.html") ?>

Here's a gift for you:

Patterns->parse("footer.html") ?> ``` {% hint style="success" %} See this example working in the [Cherrycake documentation examples](https://documentation-examples.cherrycake.io/example/patternsGuideNestedPatterns) site. {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://cherrycake.tin.cat/version-1.x-beta/guide/patterns-guide/nested-patterns.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.