【文章內容簡介】 ut) that belong in different contexts 10/23/2022 What is required... ? How do you maintain data appropriately throughout the evolution of a domain?? ? How do you do it while following the golden rule?? 10/23/2022 What is it called? ? Model Migration is the evolution of domain models after their domain has been evolved ? Requires that – the domain models conform to their new metamodel, and that – the domain models be “correct” after they are evolved, where correct either means ? Syntactically valid (if you’re going to rebuild the models, and this is a trick to reuse as many as possible), or ? Semantically valid (if you just want to transform the models and immediately use them) 10/23/2022 Methods/Techniques for MM ? Model rebuilding – Looking at old models and rebuilding them by hand ? Graphrewriting – Operates on abstract graph structures – Create subgraphs using rulebased pattern matching of a host graph (source graph) – Eventually create a “whole” graph ? Model transformations – Operates on models with a metamodel – Create new subgraphs using rules – Graphrewriting using metamodels 10/23/2022 Model Migration’s Domain ? Domain evolution is an archetypal problem found in all metamodeling tools ? There are mon aspects found in the set of model migration tools ? Exists in general, not in terms of a particular implementation – independent of rewriting implementation machinery – may be integrated with any metametamodel ? The abstract, evolution language free of implementation details is termed the domain evolution framework (DEF) ? The evolution language tied to a rewriting implementation and a metametamodel is termed a domain evolution tool (DET) 10/23/2022 Why have a domain for MM? ? Use of ontology of the original and evolved metamodels during specification ? Domain concepts of MM used in specification – “bees”, “delete on match” ? Ability to pare the two metamodels ? Abstraction of the implementation language 10/23/2022 MM: Layers of Usage D o mai n Ev o l u tio n F ramew o r k ( D E F )D E Ft e m p la t e G M E, X SL GME D o m a i n Ev o l u ti o n To o lM1 ? M2 Do m a i n Ev o l u ti o n S p e ci f i c a ti o nG M E M e t am o d e l1Rul e sR1 R2R4 R3Se q u e n c eR1 R2R4 R3DE Ft e m p l a t e G ME , X S L G M E D o m a in Ev o lu t io n To o lG M E M e t am o d e l2X SLScr i p t(ev o l uti on t oo l l a y er)(ev o l uti on s pe c i f i c ati o n l ay er)(ev o l uti on fr am ework l a y er)(ev o l uti on t oo l l a y er)t e m p la t e m e t a m e t a m o d e l, g r a p h r e w r it in g la n g u a g e 1 10/23/2022 Evolution Tool Layer D o mai n Ev o l u tio n F ramew o r k ( D E F )D E Ft e m p la t e G M E, X SL GME D o m a i n Ev o l u ti o n To o lM1 ? M2 Do m a i n Ev o l u ti o n S p e ci f i c a ti o nG M E M e t am o d e l1Rul e sR1 R2R4 R3Se q u e n c eR1 R2R4 R3DE Ft e m p l a t e G ME , X S L G M E D o m a in Ev o lu t io n To o lG M E M e t am o d e l2X SLScr i p t(ev o l uti on t oo l l a y er)(ev o l uti on s pe c i f i c ati o n l ay er)(ev o l uti on fr am ework l a y er)(ev o l uti on t oo l l a y er)t e m p la t e m e t a m e t a m o d e l, g r a p h r e w r it in g la n g u a g e 2 10/23/2022 Model D o mai n Ev o l u tio n F ramew o r k ( D E F )D E Ft e m p la t e G M E, X SL GME D o m a i n Ev o l u ti o n To o lM1 ? M2 Do m a i n Ev o l u ti o n S p e ci f i c a ti o nG M E M e t am o d e l1Rul e sR1 R2R4 R3Se q u e n c eR1 R2R4 R3DE Ft e m p l a t e G ME , X S L G M E D o m a in Ev o lu t io n To o lG M E M e t am o d e l2X SLScr i p t(ev o l uti on t oo l l a y er)(ev o l uti on s pe c i f i c ati o n l ay er)(ev o l uti on fr am ework l a y er)(ev o l uti on t oo l l a y er)t e m p la t e m e t a m e t a m o d e l, g r a p h r e w r it in g la n g u a g e 3 10/23/2022 3Layer Framework/Tool D o mai n Ev o l u tio n F ramew o r k ( D E F )D E Ft e m p la t e G M E, X SL GME D o m a i n Ev o l u ti o n To o lM1 ? M2 Do m a i n Ev o l u ti o n S p e ci f i c a ti o nG M E M e t am o d e l1Rul e sR1 R2R4 R3Se q u e n c eR1 R2R4 R3DE Ft e m p l a t e G ME , X S L G M E D o m a in Ev o lu t io n To o lG M E M e t am o d e l2X SLScr i p t(ev o l uti on t oo l l a y er)