The present invention relates to a method and respective system for sharing data between portlets within a portal. In general, a method in accordance with an embodiment of the invention includes: generating a visual representation, indicating for a predetermined first portlet a portlet property indicating whether or not the first portlet shares data with a second portlet; displaying the visual representation at the web page rendering the first portlet; and/or generating a user control, allowing to switch ON and switch OFF the ability of the first portlet to share data with the second portlet, and performing portlet integration in dependence of the portlet property.