Where is BusinessObjects Enterprise Java SDK jars located(BO XI3.1)?

We need to import Business Objects Enterprise Java SDK's jar files. However, there is no document or forum post that have the directory for version BOXI3.1.

By searching for the cecore.jar file, we find a directory that contains many Business Objects Enterprise Java SDK jar files:

D:\Business Objects\BusinessObjects Enterprise 12.0\warfiles\WebApps\BusinessProcessBI\WEB-INF\lib

Is this the correct directory for the Business Object Enterprise jar files?

We imported bellow SDK jar files:

asn1.jar

cecore.jar

celib.jar

ceplugins_client.jar

ceplugins_core.jar

ceplugins_cr.jar

cereports.jar

certj.jar

cesession.jar

ceutils.jar

clientplugins.jar

commons-codec-1.3.jar

commons-logging-1.1.jar

corbaidl.jar

ebus405.jar

flash.jar

freessl201.jar

jsafe.jar

logging.jar

pluginhelper.jar

postprocessing_oca2service.jar

publishing_oca2service.jar

rasapp.jar

rascore.jar

reporttemplate.jar

serialization.jar

SL_plugins.jar

webreporting.jar

xbean.jar

xcelsius.jar

XcelsiusSLPlugins.jar

Is this the complete list that we should import for X3.1? there are some files like commons-codec-1.3.jar, it looks a Apache jar file, not the SDK's jar file. shall i include such files as well?