[incubator-skywalking] branch oap-languages updated: Add more outlines for 6 series.

[wusheng]

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wusheng pushed a commit to branch oap-languages
in repository https://gitbox.apache.org/repos/asf/incubator-skywalking.git


The following commit(s) were added to refs/heads/oap-languages by this push:
     new f1eca0c  Add more outlines for 6 series.
f1eca0c is described below

commit f1eca0c4f9d5529d67c65169a099532681e234fb
Author: Wu Sheng <wu.sh...@foxmail.com>
AuthorDate: Mon Jul 2 12:01:17 2018 -0700

    Add more outlines for 6 series.
---
 docs/en/OAP/README.md | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/docs/en/OAP/README.md b/docs/en/OAP/README.md
index d9bbc45..1616fd8 100644
--- a/docs/en/OAP/README.md
+++ b/docs/en/OAP/README.md
@@ -2,6 +2,31 @@
 OAP(Observability Analysis Platform) is a new concept, which starts in 
SkyWalking 6.x. OAP replaces the 
 old SkyWalking collectors. The capabilities of the platform are following.
 
+## OAP capabilities
+<img src="https://skywalkingtest.github.io/page-resources/6_overview.png"/>
+In SkyWalking 6 series, OAP accepts data from more sources, which belongs two 
groups: **Tracing** and **Metric**.
+
+- **Tracing**. Including, SkyWalking native data formats. Zipkin v1,v2 data 
formats and Jaeger data formats.
+- **Metric**. SkyWalking integrates with Service Mesh platforms, such as 
Istio, Envoy, Linkerd, to provide observability from data panel 
+or control panel. Also, SkyWalking native agents can run in metric mode, which 
highly improve the 
+performance.
+
+At the same time by using any integration solution provided, such as 
SkyWalking log plugin or toolkits, 
+SkyWalking provides visualization integration for binding tracing and logging 
together by using the 
+trace id and span id.
+
+As usual, all services provided by gRPC and HTTP protocol to make integration 
easier for unsupported ecosystem.
+
+## Tracing in OAP
+Tracing in OAP has two ways to process.
+1. Traditional way in SkyWalking 5 series. Format tracing data in SkyWalking 
trace segment and span formats, 
+even for Zipkin data format. The AOP analysis the segments to get metrics, and 
push the metric data into
+the streaming aggregation.
+1. Consider tracing as some kinds of logging only. Just provide save and 
visualization capabilities for trace. 
+
+## Metric in OAP
+Metric in OAP is totally new feature in 6 series. Build observability for a 
distributed system based on metric of connected nodes.
+No tracing data is required.
 
 ## Observability Analysis Language
 Provide OAL(Observability Analysis Language) to analysis incoming data in 
streaming mode.