John Pallister had been doing just this for several years before he retired with his focus on Personal Learning and Thinking Skills. Several other eFolio pilots have similarly started by focussing on a few headings.
One very exciting pilot study in the Orkneys was based primarily on just the four components of their 'Curriculum for Excellence':
The initial headings were restricted to:
From this initial setup the children could focus primarily on working to the four main assessment criteria. In their own time they were then encouraged to complete a less-formal description of themselves, their interests and ambitions. Later on it is anticipated that the students will then expand their eFolios to cover more subjects areas of their own choices.