=Paper=
{{Paper
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|storemode=property
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|pdfUrl=https://ceur-ws.org/Vol-1470/preface.pdf
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<pdf width="1500px">https://ceur-ws.org/Vol-1470/preface.pdf</pdf>
<pre>
                                              Preface

Increasingly, models are starting to become commonplace and Model Driven Engineering (MDE) is gaining
acceptance in many domains including automotive, aerospace, railways, telecommunications, business
applications, and financial organizations. Over the last years, several modeling platforms have been
developed to simplify and automate many steps of MDE processes. However, still several challenges have to
be solved in order to enable a wider adoption of MDE technologies. One of the most important impediments
in adopting MDE tools is related to the reduced flexibility of existing modeling platforms that do not permit
to relax or enforce their rigidity depending on the stages of the applied development process. For instance,
EMF does not permit to enter models which are not conforming to a metamodel: on one hand it allows only
valid models to be defined, on the other hand it makes the corresponding pragmatics more difficult. In this
respect, there is a wide range of equally useful artefacts between the following extremes:

    -   diagrams informally sketched on paper with a pencil
    -   models entered in a given format into a generic modeling platform, e.g., Ecore/EMF

At the moment, modeling platforms encompasses only the latter possibility. However, while depending on
the stage of the process it makes sense to start with something closer to the former (to promote
communication among stakeholders) to eventually end up with the latter (to allow automatic model
processing and code generation). Thus, we are interested in exploring the possible forms of flexibility that
are required when applying MDE processes, ranging from agile ways to develop modeling artifacts and
languages to their flexible application in concrete domains.

Flexibility is also needed to enable wider possibilities for reusing MDE artefacts, like model transformations
and code generators. In particular, to deal with the growing complexity of software systems, it is necessary to
enforce consistent reuse and leverage the interconnection of the modeling artifacts that are produced and
consumed during the different phases of the applied development processes. In such contexts, modularization
mechanisms have to be devised in order to enable the development of complex modeling artifacts from
smaller ones, which are easier to process and reuse.

The first edition of the Flexible Model Driven Engineering workshop (FlexMDE) – previously known as
Extreme Modeling Workshop (XM) - has been co-located with the ACM/IEEE 18th International
Conference on Model Driven Engineering Languages & Systems (MODELS 2015). It provided a forum for
researchers and practitioners where different forms of agility have been discussed as demonstrated by the
technical program, including agile development of domains specific languages, agile requirements
engineering, and fast development of data-intensive Web applications. The program included also a keynote
by Prof. Colin Atkinson (University of Mannheim) entitled “Maximizing the Amount of Information Not
Modelled in MDE”. As part of the workshop, an informal tool demonstrations session has been also
organized consisting of 5 tools aiming at adding flexibility to MDE at different extents.

Many people contributed to the success of FlexMDE 2015. We would like to truly acknowledge the work of
all Program Committee members, and reviewers for the timely delivery of reviews and constructive
discussions given the very tight review schedule. Finally, we would like to thank the authors, without them
the workshop simply would not exist.



October 2015

                                                                                            Davide Di Ruscio
                                                                                                 Juan de Lara
                                                                                          Alfonso Pierantonio

</pre>