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A Plug-In Architecture for Graph Based Collaborative Modeling Systems

A Plug-In Architecture for Graph Based Collaborative Modeling Systems. Niels Pinkwart. A Plug-In Architecture for Graph Based Collaborative Modeling Systems. Sharing and commenting of resources as a basic means to support learning Representation modes of these resources differ

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A Plug-In Architecture for Graph Based Collaborative Modeling Systems

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  1. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Niels Pinkwart

  2. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Sharing and commenting of resources as a basic means to support learning • Representation modes of these resources differ • Frequently used mode forresources and means ofcommenting: graph based

  3. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Augmentation of argumentation tools: ”Collaborative Mind Tools“ • Shared computational objects to think (work) with • Enriched with rules and interpretation patterns • Semantic processing of information • Promising and easily possible: integration with modeling languages

  4. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Cool Modes(Collaborative Open Learning and Modeling Environment) Central aims: • Means to mix different externally defined conceptual representations; plug-in domain semantics • Work without loosing domain or social context • High degree of flexibility (also for cooperation) without loss of processing power

  5. A Plug-In Architecture for Graph Based Collaborative Modeling Systems

  6. A Plug-In Architecture for Graph Based Collaborative Modeling Systems System Evaluation • Single plug-ins evaluated in school settings • Questionnaire for extension mechanism planned Outlook • Model transformations • Metadata and awareness components

  7. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Plug-Ins (dynamic use) System structure Synchronisation: MatchMaker Workspaces (shared) intra-tool interoperability

  8. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Reference Frames: Principles • Encapsulate semantic units / languages, ”microworlds“ that can be mixed • Offer shareable entities for work (or: thinking) • Contain objects, relationships, constraints and interpretation patterns • Have a UI that relies on direct manipulation • Are externally defined and ”pluggable“

  9. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Reference Frames: Structure Realisations: - Code based (Java) - Data based (XML)

  10. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Reference Frames: XML example (Petri Nets) <ReferenceFrame> <TemplateClass>DefaultReferenceFrame</TemplateClass> <Objects> <Node> <ClassRef>PlaceNode</ClassRef> </Node> <Node> <ClassRef>TransitionNode</ClassRef> </Node> <Edge> <ClassRef>PetriEdge</ClassRef> </Edge>

  11. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Reference Frames: XML example (Petri Nets) <ReferenceFrame> <TemplateClass>DefaultReferenceFrame</TemplateClass> <Objects> <Node> <ClassRef>PlaceNode</ClassRef> </Node> <Node> <ClassRef>TransitionNode</ClassRef> </Node> <Edge> <ClassRef>PetriEdge</ClassRef> </Edge>

  12. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Reference Frames: XML example (Petri Nets) <Objects> … <Rule Message=“It is not allowed to draw ...”> <EdgeRule weight=“0”> <NodeRef>PlaceNode</NodeRef> <NodeRef>PlaceNode</NodeRef> <EdgeRef>PetriEdge</NodeRef> </EdgeRule></Rule> <Metadata> <Name>Petri Net Frame</Name> <Icon>petri32.gif</Icon> <Package>info.collide.coolmodes.plugins.petri</Package> </Metadata> </ReferenceFrame>

  13. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Reference Frames: XML example (Petri Nets) <Objects> … <Rule Message=“Do not connect Places to Places”> <EdgeRule weight=“0”> <NodeRef>PlaceNode</NodeRef> <NodeRef>PlaceNode</NodeRef> <EdgeRef>PetriEdge</NodeRef> </EdgeRule></Rule> <Metadata> <Name>Petri Net Frame</Name> <Icon>petri32.gif</Icon> <Package>info.collide.coolmodes.plugins.petri</Package> </Metadata> </ReferenceFrame>

  14. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Reference Frame based interpretation : How does Cool Modes analyse user-generated structures and how does it react? • Workspace content is a graph (N,E) • Interpretation: Ip(N,E) • Generic information about elements is available to all the Frames • Generic Interpretation by a Frame F: Ipgen (F,N,E)

  15. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Reference Frame based interpretation • Each Frame F has sets Knows(F)Defines(F). • (NF,EF) largest subgraph of (N,E) with typesIn(NF)  Knows(F) andtypesIn(EF)  Knows(F) • Semantically enriched interpretation: Ipsem (F, NF, EF)

  16. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Reference Frame based interpretation • Each Frame F has sets Knows(F)Defines(F). • (NF,EF) largest subgraph of (N,E) with typesIn(NF)  Knows(F) andtypesIn(EF)  Knows(F) • Semantically enriched interpretation: Ipsem (F, NF, EF) • Overall, with set of Frames  and aggregation :

  17. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Reference Frame based interpretation Events upon node or edge... • Adding • Removal • Movement • Model change • ... are distributed to • Neighbours (local) • Reference Frames (global)

  18. A Plug-In Architecture for Graph Based Collaborative Modeling Systems System Evaluation • Several reference frames evaluated in school settings, results used for usability improvement • Questionnaire for evaluation of the extension mechanism itself planned Outlook • Model transformations • Inter-operability between Reference Frames  going beyond Knows(F) • Metadata and awareness components

  19. A Plug-In Architecture for Graph Based Collaborative Modeling Systems Questions? http://www.collide.info

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