# Reference This section provides comprehensive reference documentation for the United Manufacturing Hub (UMH) Core components. Here you'll find detailed technical specifications, configuration options, and structural documentation to help you implement, configure, and troubleshoot your UMH deployment. The reference materials include: * **Configuration Reference**: Complete documentation of the central configuration file (`/data/config.yaml`), including all available fields, data types, and examples * **Container Layout**: Detailed overview of the container's file system structure, data organization, and persistent volume layout * **Template Variables**: Comprehensive glossary of all available template variables for protocol converter configurations, including connection, location, and system variables * **State Machines**: Reference documentation for state machine implementations and workflows * **HTTP API**: GraphQL API reference for Topic Browser queries and programmatic access Navigate through these pages to find specific configuration parameters, understand system architecture, or look up technical details for your UMH implementation. --- # 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.umh.app/reference.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.