GEF(GraphicalEditingFramework)isaJavatechnology,itisapartoftheEclipseframeworkdevelopedbyIBM.Itgivesdevelopersafullsolutionforgraphicalmodelingofajavaobjectmodel,anditcanbeusedinconjunctionwithothertechnologiessuchasEMF(EclipseModelingFramework)orGMF