Update alarm doc introduce keys with data types of the configuration file. (#9514)
diff --git a/docs/en/changes/changes.md b/docs/en/changes/changes.md
index 304910b..39251fb 100644
--- a/docs/en/changes/changes.md
+++ b/docs/en/changes/changes.md
@@ -106,5 +106,6 @@
* Add a table for metric calculations in the ui doc.
* Add an explanation for alerting kernel and its in-memory window mechanism.
* Add more docs for widget details.
+* Update alarm doc introduce configuration property key
All issues and pull requests are [here](https://github.com/apache/skywalking/milestone/136?closed=1)
diff --git a/docs/en/setup/backend/backend-alarm.md b/docs/en/setup/backend/backend-alarm.md
index 9de3653..83025c3 100644
--- a/docs/en/setup/backend/backend-alarm.md
+++ b/docs/en/setup/backend/backend-alarm.md
@@ -348,3 +348,24 @@
In order to determine whether an alerting rule is triggered or not, SkyWalking needs to cache the metrics of a time window for
each alerting rule. If any attribute (`metrics-name`, `op`, `threshold`, `period`, `count`, etc.) of a rule is changed,
the sliding window will be destroyed and re-created, causing the Alarm of this specific rule to restart again.
+
+### Keys with data types of alerting rule configuration file
+
+| Alerting element | Configuration property key | Type | Description |
+|----------------------|----------------------------|----------------|--------------------|
+| Include names | include-names | string array | |
+| Exclude names | exclude-names | string array | |
+| Include names regex | include-names-regex | string | Java regex Pattern |
+| Exclude names regex | exclude-names-regex | string | Java regex Pattern |
+| Include labels | include-labels | string array | |
+| Exclude labels | exclude-labels | string array | |
+| Include labels regex | include-labels-regex | string | Java regex Pattern |
+| Exclude labels regex | exclude-labels-regex | string | Java regex Pattern |
+| Tags | tags | key-value pair | |
+| Threshold | threshold | number | |
+| OP | op | operator | example: `>`, `>=` |
+| Period | Period | int | |
+| Count | count | int | |
+| Only as condition | only-as-condition | boolean | |
+| Silence period | silence-period | int | |
+| Message | message | string | |
\ No newline at end of file
