BREAKING: Generate System metrics semconv from YAML + move attributes to their own namespace

CHANGELOG.md

@@ -71,6 +71,33 @@ release.
   ([#270](https://github.com/open-telemetry/semantic-conventions/pull/270))
 - Moved RPC streaming notes from metric brief section to notes section.
   ([#275](https://github.com/open-telemetry/semantic-conventions/pull/275))
+- BREAKING: Generate System metrics semconv from YAML.
+  ([#89](https://github.com/open-telemetry/semantic-conventions/pull/89))
+  - Rename attributes for `system.cpu.*` metrics:
+    - `state` to `system.cpu.state`
+    - `cpu` to `system.cpu.logical_number`
+  - Rename attributes for `system.memory.*` metrics:
+    - `state` to `system.memory.state`
+  - Rename attributes for `system.paging.*` metrics:
+    - `state` to `system.paging.state`
+    - `type` to `system.paging.type`
+    - `direction` to `system.paging.direction`
+  - Rename attributes for `system.disk.*` metrics:
+    - `device` to `system.device`
+    - `direction` to `system.disk.direction`
+  - Rename attributes for `system.filesystem.*` metrics:
+    - `device` to `system.device`
+    - `state` to `system.filesystem.state`
+    - `type` to `system.filesystem.type`
+    - `mode` to `system.filesystem.mode`
+    - `mountpoint` to `system.filesystem.mountpoint`
+  - Rename attributes for `system.network.*` metrics:
+    - `device` to `system.device`
+    - `direction` to `system.network.direction`
+    - `protocol` to `network.protocol`
+    - `state` to `system.network.state`
+  - Rename attributes for `system.processes.*` metrics:
+    - `status` to `system.processes.status`
 
 ## v1.21.0 (2023-07-13)