kezhenxu94 commented on code in PR #9575:
URL: https://github.com/apache/skywalking/pull/9575#discussion_r968538853
##########
docs/en/concepts-and-designs/lal.md:
##########
@@ -43,6 +43,38 @@ filter {
Note that when you put `regexp` in an `if` statement, you need to surround the
expression with `()`
like `regexp(<the expression>)`, instead of `regexp <the expression>`.
+- `tag`
+
+`tag` function provide a convenient way to get the data of tags.
Review Comment:
What about
```suggestion
`tag` function provide a convenient way to get the value of a tag key.
```
##########
docs/en/concepts-and-designs/lal.md:
##########
@@ -43,6 +43,38 @@ filter {
Note that when you put `regexp` in an `if` statement, you need to surround the
expression with `()`
like `regexp(<the expression>)`, instead of `regexp <the expression>`.
+- `tag`
+
+`tag` function provide a convenient way to get the data of tags.
+
+We can add tags like following:
+``` JSON
+[
+ {
+ "tags":{
+ "data":[
+ {
+ "key":"TEST_KEY",
+ "value":"TEST_VALUE"
+ }
+ ]
+ },
+ "body":{
+ ...
+ }
+ ...
+ }
+]
+```
+And we can use this method to get the data of tags.
Review Comment:
```suggestion
And we can use this method to get the value of the tag key `TEST_KEY`.
```
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