ATLAS Model Weaver

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ATLAS Model Weaver Using weaving to define
generic model correspondences Marcos Didonet
Del Fabro fabro _at_ univ-nantes.fr PhD student
(2004 - 07) Supervisors Jean Bézivin and Patrick
Valduriez
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Overview

• Model weaving
• Use cases
• Mapping as models
• Model Weaver workbench
• Common weaving core
• Extensions
• Eclipse implementation

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Model Weaving

• Model engineering in ATLAS
• Modeling in the small (operations between model
  elements)
• Weaving, transformations
• Model Weaving
• Correspondences between models

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Use cases

• Transformation specifications
• Data mapping
• Heterogeneous data integration
• Schema merging
• Schema evolution
• Metadata management ( OMG Y organization )

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Weaving as Models

• Use of same model management primitives!
• Weaving of weavings (composition, undo)
• Expressiveness
• Attach semantics
• Foreign keys, nested constraints, ordering, etc.
• Hard to express with 1-1 correspondences

Weaving model
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Weaving metamodel

• Abstract and extensible core
• Associations, correspondences (links)

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Metamodel extensions

• Metamodel extensions
• add specific semantics to the correspondences
• Knowledge capture
• FK, nested, ordered, equals, containment,
  supplier/consumer,
• Weaving model ( 1 N ) woven models

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Model Weaver Workbench

• Eclipse EMF (Eclipse Modeling Framework)
• Manipulation of (meta)models
• Ecore metametamodel
• Reflective API
• Allows metamodel flexibility
• Auto generated UI
• Metamodels are represented in KM3 (KM32Ecore
  transformation)
• Based on contributions (small interconnected
  plugins)

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Example RDBMS x XML

• Metamodel extensions

Weaving metamodel represented in KM3 Creation of
Eclipse extension points
Extension de base correspondences, models, links
Extension DBMXML FK, nested, equals
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Example RDBMS to XML

• Woven (meta)model(s) selection (allows N woven
  models)

Interface extension point Different
visualizations for the woven models
Object identification mechanism Object adapters
Woven metamodel (or model)
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Extensible workbench
Plugged panels
Item providers extensions
Identification mechanism
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Semantic structures
Semantics
XML schema conforms to Ecore
SQL schema conforms to Ecore
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Weaving use ATL transformation

• IN RDBMS representation in XMI
• lt?xml version"1.0" encoding"UTF-8"?gt
• ltRootDatabase xmiversion"2.0"
• xmlnsxmi"http//www.omg.org/XMI"
  xmlnsRoot"http//relationalMetaSchema.ecore"
  xmiid"Database1"gt
• ltbooks xmiid"Books6"gt
• ltbookRcds xmiid"BookRcd7"
  ISBN"445533446FR" Title"Model Weaving"
  Author"Myself"
• SID"1"/gt
• ltbookRcds xmiid"BookRcd8"
  ISBN"445566US" Title"Data mapping"
  Author"Ralf"
• SID"2"/gt
• lt/booksgt
• lt/RootDatabasegt
• ltsubjects xmiid"Subjects2"gt
• ltsubjectRcd xmiid"SubjectRcd3" SID"1"
  Description"MDD"/gt
• ltsubjectRcd xmiid"SubjectRcd4" SID"2"
  Description"Data mapping"/gt
• ltsubjectRcd xmiid"SubjectRcd5" SID"3"
  Description"Computer Science"/gt
• lt/subjectsgt

• OUT XML document
• lt?xml version"1.0" encoding"ASCII"?gt
• ltRootRoot xmiversion"2.0" xmlnsxmi"http//www
  .omg.org/XMI" xmlnsRoot"Root"gt
• ltbooks ISBN"445533446FR" Title"Model
  Weaving" Author"Myself"gt
• ltsubjects SubjectID"1" Description"MDD"/gt
• lt/booksgt
• ltbooks ISBN"445566US" Title"Data mapping"
  Author"Ralf"gt
• ltsubjects SubjectID"2" Description"Data
  mapping"/gt
• lt/booksgt
• lt/RootRootgt

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ATLAS Model Weaver - end

• Thanks
• Questions?
• Comments?