anchor.diff:  
   === Maven Repository
   
  -At the moment the plugin SDK is not yet available in Maven central. To develop your own plugins, use the following repository:
  -
  -[source,xml]
  -----
  -        <repository>
  -            <id>repository.hivemq.com</id>
  -            <name>HiveMQ Repository</name>
  -            <url>http://repository.hivemq.com:8081/nexus/content/groups/public/</url>
  -            <releases>
  -                <enabled>true</enabled>
  -            </releases>
  -            <snapshots>
  -                <enabled>true</enabled>
  -            </snapshots>
  -        </repository>
  -    </repositories>
  -
  -----
  +*Since version 2.0.0, the _hivemq-spi_ is available in Maven central, so no special configuration is needed*.
   
   
   === Using the SDK
  
positive.code: === Plugin Development Documentation
  
  Please visit {hivemq-plugin-docu-link}[our website] for the documentation how to develop plugins.
  
negative.code: :hivemq-github-link: https://github.com/hivemq
  :hivemq-link: http://www.hivemq.com
  :hivemq-plugin-docu-link: http://www.hivemq.com/docs/plugins/latest
  :hivemq-plugin-directory: http://www.hivemq.com/plugins/
  
  == HiveMQ SDK
  
  image:https://travis-ci.org/hivemq/hivemq-spi.png?branch=master["Build Status", link="https://travis-ci.org/hivemq/hivemq-spi"]
  
  The enterprise MQTT broker HiveMQ offers this free and open source plugin SDK with service provider interfaces. This allows everyone to extend HiveMQ and add custom functionality via plugins.
  
  With custom HiveMQ plugins, it's easy to add functionality like writing messages to databases, integrate with other service buses, collect statistics, add fine-grained security and virtually anything you else you can imagine.
  
  