Use the following portion of a long document to see if any of the text is relevant to answer the question.
If you can't find relevant information, say: "I could not find relevant information!".
If you find steps, code snippets which are relevant, copy them exactly into your answer.
If you find a step to be relevant, copy the adjacent steps as well.
If you find descriptions summarize them and include them into your answer.
===============================
3.2.1
Metric Output Interface Specification
3.2.1.1
Metric Kafka® Message Structure
Metric output is streamed to Apache® Kafka event streaming platform.
Table 18     Kafka Message Structure
Message part
Description
Key
Hashed IMSI value
Timestamp
Metric record timestamp in ms
Header
Fields: - <version>: Interface version
Payload
Interface version specific record
Note: 
An interface version can be used by one or more metric outputs.
Interface Descriptions
66
1/198 10-AVA 901 59 Uen G
|
2022-12-08
Available Versions
—
Metric Output Interface Version 0
—
Metric Output Interface Version 1
—
Metric Output Interface Version 2
—
Metric Output Interface Version 3
Version Changelog
Table 19     Version Changelog Table
Versio
n
Changes
Versio
n 0
N/A
Versio
n 1
— Metric specific fields can now be of type eea.node or
eea.location
— imsi within eea.subscriber can be tokenized
— msisdn within eea.subscriber has type long if set as plain value
or bytes if set as AES256 encrypted value
— ip and ue_local_ip within eea.bearer have type string if set
as plain value or bytes if se Write your response with exactly 3 paragraphs, separated with the markdown divider: ***.
user