SLF4J 1.4.3 API

SLF4J packages

org.slf4j	Core logging interfaces.
org.slf4j.helpers	Helper classes.
org.slf4j.impl	Implementations of core logging interfaces defined in the org.slf4j package.
org.slf4j.spi	Classes and interfaces which are internal to SLF4J.

Jakarta Commons Logging packages

org.apache.commons.logging	Simple wrapper API around multiple logging APIs.
org.apache.commons.logging.impl	Concrete implementations of commons-logging wrapper APIs.

Apache log4j

org.apache.log4j

An rather minimal but sufficient implementation redirecting all calls to a log4j logger to a logback logger.