wu-sheng commented on a change in pull request #8379:
URL: https://github.com/apache/skywalking/pull/8379#discussion_r777870245
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File path: docs/en/concepts-and-designs/overview.md
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@@ -27,6 +27,10 @@ In addition, you can integrate
1. Other distributed tracing using SkyWalking native agents and SDKs with
Zipkin, Jaeger and OpenCensus.
1. Other metrics systems, such as Prometheus, Sleuth(Micrometer),
OpenTelemetry.
+Starting from v9, SkyWalking introduces the new core concept **Layer**.
+A layer represents an abstract framework in computer science, such as
Operating System(OS_LINUX layer),
+Kubernetes(k8s layer). This kind of layer would-be owners of different
services/instances detected from different technology.
Review comment:
Please move `layer` after `SkyWalking allows users to understand the
topology relationship between Services and Endpoints, to view the metrics of
every Service/Service Instance/Endpoint and to set alarm rules.`.
And should declare `layer` directly, as this would not be the change log or
upgrade guidance
```markdown
A **layer** represents an abstract framework in computer science, such as
Operating System(OS_LINUX layer),
Kubernetes(k8s layer). All detected instances belong to a layer to represent
the running environment of this instance, the service would have one or
multiple layer definitions according to its instances.
```
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