Skywalking内置Tags

• 定义所在源代码文件：

/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/tag/Tags.java

取值	对应Tag
1	url
2	status_code
3	db.type
4	db.instance
5	db.statement
6	db.bind_vars
7	mq.queue
8	mq.broker
9	mq.topic
10	http.method
11	http.params
12	x-le
13	http.body
14	http.headers