The JSPEditContainer JSP is located in the /var/opt/SUNWportal/portals/<portal_id>/desktop/developer_sample/JSPEditContainer directory. These JSPs are used when the Edit icon is selected in a channel title bar inside a JSP- based container. Channels that have the editType defined as EDIT_SUBSET use these JSPs. The difference between this JSP and the one from default directory is that this includes the Desktop theme style.
The JSP available in the JSPEditContainer directory and its description is:
Displays the Edit view of a channel. Also provides a wrapper around the actual Edit view for a given channel.