Finally I've found a declarative way to handle this
(which is inspired by the layout of Eclipse internal CVS Repositories Exploring perspective
and decompiled its source code)
plugin.xml
<!-- ************** Perspective Extensions START **************** -->
<extension
point="org.eclipse.ui.perspectiveExtensions">
<perspectiveExtension targetID="$YOUR_PERSPECTIVE_ID$">
<view
closeable="false"
id="$BOTTOM_VIEW_ID$"
moveable="false"
ratio="0.6"
relationship="bottom"
relative="$TOP_VIEW_ID$"
showTitle="true"
standalone="true">
</view>
</perspectiveExtension>
</extension>