# Nested Workflow Block A new nested Workflow block is now available, allowing you to construct pipelines that call and execute other existing workflows. When you add this block, it automatically adopts the inputs and outputs of the nested workflow, enabling you to easily pass data like images or object detections between the parent and child pipelines. The Workflow block enables a highly modular approach to building computer vision applications. You can reuse existing logic across multiple pipelines and pass resolved output types directly to downstream steps like visualizations without rebuilding the entire sequence. [See the Workflow block documentation](https://inference.roboflow.com/workflows/blocks/inner_workflow/) --- # 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://docs.roboflow.com/changelog/explore-by-month/april-2026/nested-workflow-block.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.