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DatMod semMod zur DBK.svg Datenmodellierung vom semantischen Modell zur Datenbank eigene Erstellung aus abgeleitet Version SVGVersion VRBY Konertierung zu SVG Perhelion ok alte Version Inkscapehand PDrelease Original upload log de Ireas CommonsHelper page de DatModvsemModzurDBK svg Perhelion bytes no strucktur position