Deprecated means the feature will no longer exist in the next major release of Weblogic Server. Although you can still use log4j option for server logging for the 12.1.3 , it is advisable for you to change it to the alternate ones.
Note: You can still use log4j framework for application logging, however the doc you referred is related to server logging. What's New in Oracle WebLogic Server
"The use of Log4j with the WebLogic logging service, as an alternative to Java logging, is deprecated as of WebLogic Server 12.1.3."
The below doc you have read is related to application logging.
Hope this clarifies!!
The use of Log4j with the WebLogic logging service, as an alternative to Java logging, is deprecated as of WebLogic Server 12.1.3.
Implies Log4j is deprecated as an alternative to Java logging.
"For advanced usage scenarios and for configuring loggers, you use the Java Logging APIs."
Ahh, that makes sense. I mixed up application logging and server logging.
I'm still quite new to WebLogic and the docs takes a while to get used to...
Thanks you very much for clarifying!