> For the complete documentation index, see [llms.txt](https://unitsofmeasurement.gitbook.io/unit-ri-userguide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://unitsofmeasurement.gitbook.io/unit-ri-userguide/master.md).

# Introduction

JSR 363 - Reference Implementation User Guide

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This document is a user guide describing all relevant aspects of the JSR 363 Reference Implementation. For using Units of Measurement API along with this implementation.