XML　has　become　the　de　facto　standard　for　representing　and　interchanging　data　in　web-based　applications.　And　XML　view　has　been　widely　applied.　In　relational　database,　the　views　are　often　defined　by　a　qnery　statement,　thongh　there　may　be　GUI　tools　as　aids.　However,　the　users　usually　desire　a　conceptual　modeling　tool　to　help　them　define　views　and　communicate　with　each　other.　Richer　semantics　are　also　expected　when　users　tackle　view　related　issues,　such　as　view　updates.　In　this　paper,　we　present　a　framework　for　defining　XML　views,　which　includes　three　levels:　conceptual　level,　logical　level　and　physical　level.　Conceptual　level　is　described　by　some　conceptnal　model,　e.g.　EER　or　UML.　Logical　level　is　captured　by　some　XML　schema　language　and　physical　level　is　the　XML　views　data.　In　particular,　we　show　what　semantics　should　be　captnred　and　how　to　represent　them.　©　2010　IEEE.