# Part I. Introduction

This document is the reference guide for Gemini Blueprint. It explains the relationship between Gemini Blueprint and the OSGi 4.2 Blueprint specification, defines Gemini Blueprint concepts and semantics, the syntax for the OSGi Service Platform based namespaces, the Gemini Blueprint extender bundle and the OSGi manifest header entries defined by Gemini Blueprint.

For an introduction to OSGi or Spring, or Gemini Blueprint examples, please refer to Chapter 4, Getting Started - this documentation refers only to Gemini Blueprint and assumes the user is familiar with OSGi and Spring concepts.

Note: OSGi is a trademark of the OSGi Alliance. Project name is pending final approval from the Alliance.

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Preface | Sponsored by SpringSource | Chapter 1. Spring Dynamic Modules becomes Eclipse Gemini Blueprint