<commit_before>Changes by Version
==================
Release Notes.

6.0.0-beta
------------------

#### Protocol
- Provide Trace Data Protocol v2
- Provide SkyWalking Cross Process Propagation Headers Protocol v2.

#### Java Agent
- Support Trace Data Protocol v2
- Support SkyWalking Cross Process Propagation Headers Protocol v2.
- Support SkyWalking Cross Process Propagation Headers Protocol v1 running in compatible way. Need declare open explicitly.<commit_msg>Add changlog. (#2171)<commit_after>Changes by Version
==================
Release Notes.

6.0.0-GA
------------------

#### Java Agent
- Support gson plugin(optional).
- Support canal plugin.
- Fix missing ojdbc component id.
- Fix dubbo plugin conflict.
- Fix OpenTracing tag match bug.
- Fix a missing check in ignore plugin.

#### Backend
- Adjust service inventory entity, to add properties.
- Adjust service instance inventory entity, to add properties.
- Add nodeType to service inventory entity.
- Fix when operation name of local and exit spans in ref, the segment lost.
- Fix the index names don't show right in logs. 
- Fix wrong alarm text.
- Add test case for span limit mechanism.
- Add telemetry module and prometheus implementation, with grafana setting.
- A refactor for register API in storage module.

#### UI
- Add new trace view.
- Add word-break to tag value. 

#### Document
- Add two startup modes document.
- Add PHP agent links.
- Add some cn documents.
- Update year to 2019
- User wall updated.
- Fix a wrong description in `how-to-build` doc.

All issues and pull requests are [here](https://github.com/apache/incubator-skywalking/milestone/30?closed=1)

6.0.0-beta
------------------

#### Protocol
- Provide Trace Data Protocol v2
- Provide SkyWalking Cross Process Propagation Headers Protocol v2.

#### Java Agent
- Support Trace Data Protocol v2
- Support SkyWalking Cross Process Propagation Headers Protocol v2.
- Support SkyWalking Cross Process Propagation Headers Protocol v1 running in compatible way. Need declare open explicitly.
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