Full paper is available from https://hal.inria.fr/hal-01159205 Presentation associated to the paper presented at ER 2015

1. EMF Views:
A View Mechanism for
Integrating Heterogeneous Models
Hugo Bruneliere, Jokin Garcia,
Manuel Wimmer and Jordi Cabot
ER 2015 @ Stockholm, Sweden
Monday 19th of October 2015

2. Model Views – (Industrial) Motivation

3. Model Views – Base Idea
Modeling
World
Database
World
IT Architect
Decision-maker
IT Engineer
SELECT
PROJECT
JOIN

4. Model Views – State-of-the-art (1/3)
● Views in databases (relational, OO)
● Views in modeling languages (UML, ER)
 intra-model ones...
● What about inter-model views?

5. Model Views – State-of-the-art (2/3)
● Multi-viewpoint modeling
o Single base, generative, mappings...
Model a3
Model a2
Model a1
Multi-viewpoint
Mechanism
Model a

6. Model Views – State-of-the-art (3/3)
● Traditional model composition
o Common model (~view) from connected ones
o Merge, inheritance, generative...
Model c
Model b
Model a
Composition
Mechanism
Model abc

7. Model Views – Key Challenges (1/2)
● Genericity
o All modeling languages
● Expressivity
o SELECT-PROJECT-JOIN-like
● Non-intrusiveness
o Existing models preserved
● Interoperability
o View = regular model

8. Model Views – Key Challenges (2/2)
● Modifiability
o Changeables views
● Synchronization
o View ↔ Model(s)
● Scalability
o View creation/handling,
memory vs. CPU

9. EMF Views – Proposition/Contribution
Model view approach for easier
heterogenous models integration
Virtualization framework for viewpoints/views
SQL-like ViewPoint Definition Language
(a.k.a. VPDL)

10. EMF Views – Conceptual Approach
View Builder
(Virtualization)
Viewpoint Builder
(Virtualization)
Mode l c
Model b
Metamodel C
Runtime
Design time1
2
Viewpoint
(virtual
metamodel)
View
(virtual model)
Metamodel B
Metamodel A
Model a
Conforms to
Conforms to
Weaving
model
VPDL fileDesigner
Weaving
model
User

11. EMF Views – @ Design Time
m2t
Viewpoint
Builder
(Virtualization)
Weaving model
Viewpoint file
VPDL file
Designer
Matching file
Refers to
Metamodel C
Metamodel B
Metamodel A

12. EMF Views – @ Runtime
View
Builder
(Virtualization)
Weaving model
User
View file
generation
Viewpoint file
(+ matching file)
Refers to
Model c
Model b
Model a

13. EMF Views –
ViewPoint Definition Language (1/2)
Operator Description
CREATE VIEW
Name,
contributing metamodels
SELECT
Attributes/relations to be shown
(or * for all)
FROM (JOIN)
Linked concepts,
name of new relations
WHERE
(OCL) constraints for filters,
connections, etc.

14. EMF Views –
ViewPoint Definition Language (2/2)
● Simple viewpoint definition 
TOGAF/BPMN/ReqIf integration...

15. EMF Views – Eclipse-based tooling
● Short demonstration...

16. Conclusion & Future Work
● Model view approach
o Architecture + DSL
o EMF-based solution
● What’s next?
o VPDL v1.x or v2.0...
o View update problem...
o Persistence…
o Validation…

17. Questions? Comments?
● http://atlanmod.github.io/emfviews
● Contact persons:
o Hugo Bruneliere - hugo.bruneliere@inria.fr
o Jokin Garcia (impl.) - jokin.garcia-perez@inria.fr