Revision as of 14:00, 28 August 2016

Articles and Presentations

2016-2017 / Oxygen

• "Local Optimizations in Eclipse QVTc and QVTr using the Micro-Mapping Model of Computation", E.D.Willink, "Second International Workshop on Executable Modeling (EXE 016)", October 2016

Some underlying principles of the QVTs scheduling. First results of the new Eclipse QVTr implementation demonstrating scalability and major speedups through the use of metamodel-driven scheduling and direct Java code generation.

The OMG QVT FAS was the result of, perhaps premature, enthusiasm to standardize the fledging model transformation community. The Eclipse implementation of the QVTo language prospers but the initial implementations of the declarative QVTr language had poor performance and have faded away. Perhaps it is time to consign QVTc and QVTr to the dustbin of misguided initiatives. Alternatively, in this paper we show how metamodel-driven analysis and a disciplined Model of Computation support fulfilment of the original aspirations.

• "Optimized declarative transformation - First Eclipse QVTc results", E.D.Willink, "BigMDE: Scalable Model Driven Engineering (BigMDE 016)", July 2016

First results of the new Eclipse QVTc implementation demonstrating scalability and major speedups through the use of metamodel-driven scheduling and direct Java code generation.

It is over ten years since the first OMG QVT FAS was made available with the aspiration to standardize the fledgling model transformation community. Since then two serious implementations of the operational QVTo language have been made available, but no implementations of the core QVTc language, and only rather preliminary implementations of the QVTr language. No significant optimization of these (or other transformation) languages has been performed. In this paper we present the first results of the new Eclipse QVTc implementation demonstrating scalability and major speedups through the use of metamodel-driven scheduling and direct Java code generation.

2015-2016 / Neon

• "Traceability: What does it really mean for QVT?", E.D.Willink, "Fourth Workshop on the Analysis of Model Transformations (AMT 2015)", October 2015

Traceability in Model Transformation languages supports not only post-execution analysis, but also incremental update and co-ordination of repetition. The Query/View/Transformation family of languages specify a form of traceability that unifies high and low level abstraction in declarative and imperative transformation languages. Unfortunately this aspect of the QVT specification is little more than an aspiration. We identify axioms that resolve the conflicting requirements on traceability, and provide a foundation for resolving further issues regarding equality, transformation extension and mapping refinement.

This invited paper was withdrawn at the camera-ready stage when it finally dawned that a trace for resolution was not identical to a trace for re-execution. The QVT 1.3 specification was updated to remove the suggestion that they are the same.

2014-2015 / Mars

• "QVT Traceability: What does it really mean?", E.D.Willink, "7th The International Conference on Model Transformation (ICMT 2014)", July 2014

(not accepted).

Traceability in Model Transformation languages supports not only post-execution analysis, but also incremental update and co-ordination of repetition. The Query/View/Transformation family of languages specify a form of traceability that unifies high and low level abstraction in declarative and imperative transformation languages. Unfortunately this aspect of the QVT specification is little more than an aspiration. We identify axioms that resolve the conflicting requirements on traceability, and provide a foundation for resolving further issues regarding equality, transformation extension and mapping refinement.

2013-2014 / Luna

• "QVT State of the Art", E.D.Willink, OMG quarterly meeting, March 2014

QVT status and Eclipse QVTd plans.

• "QVT Imperative - A practical foundation for declarative transformation execution", Horacio Hoyos, Dimitris Kolovos, Edward Willink, "28th IEEE/ACM International Conference on Automated Software Engineering", November 2013

(Submission not accepted)

The early enthusiasm, in 2002, for model to model transformation languages led to eight submissions for an OMG standard comprising three languages, yet no commercial products have appeared. The QVT Core language was intended as the foundation for QVT Relations but the available implementations have ignored the core language. Rather than ignoring the core language, we take the opposite approach and introduce three more core languages. Progressive semantic simplification through these core language terminates in an imperative unidirectional language that facilitates implementation.

• "QVT Imperative - A practical semantics for declarative transformations", Horacio Hoyos, Dimitris Kolovos, Edward Willink, "6th The International Conference on Model Transformation (ICMT 2013)", June 2013

"Extended abstract" accepted. "slides".

The early enthusiasm, in 2002, for model to model transformation languages led to eight submissions for an OMG standard comprising three languages, yet no commercial products have appeared. The QVT Core language was intended as the foundation for QVT Relations but the available implementations have ignored the core language. Rather than ignoring the core language, we take the opposite approach and introduce three more core languages. Progressive program-to-program transformation through these core languages terminates in an easily implemented imperative language that supports declarative transformations.