The Portal Server 7.1 uses JSP files for a channel’s presentation layer. FrameTabContainer references two main JSPs, frametab.jsp and frametabedit.jsp, through the contentPage and editPage properties.
Content template is responsible for the front page of the container channel and the file name for the tab container channel is frametab.jsp. The frametab.jsp file extensively uses the Desktop taglibs.
The Edit page is where you can add, remove, and rename pages. The frametabedit.jsp is used to display this page.