Esta es la versión de autor de la comunicación de congreso publicada en: This is an author produced version of a paper published in: Abstract-Model-Driven Engineering (MDE) promotes the use of models to conduct all phases of software development in an automated way. Models are frequently defined using DomainSpecific Modelling Languages (DSMLs), which many times need to be developed for the domain at hand. However, while constructing DSMLs is a recurring activity in MDE, there is scarce support for gathering, reusing and enacting knowledge for their design and implementation. This forces the development of every new DSML to start from scratch.To alleviate this problem, we propose the construction of DSMLs and their modelling environments aided by patterns which gather knowledge of specific domains, design alternatives, concrete syntax, dynamic semantics and functionality for the modelling environment. They may have associated services, realized via components. Our approach is supported by a tool that enables the construction of DSMLs through the application of patterns, and synthesizes a graphical modelling environment according to them.

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Scalability in modeling has many facets, including the ability to build larger models and domain specific languages (DSLs) efficiently. With the aim of tackling some of the most prominent scalability challenges in Model-Based Engineering (MBE), the MONDO EU project developed the theoretical foundations and open-source implementation of a platform for scalable modeling and model management. The platform includes facilities for building large graphical DSLs, for splitting large models into sets of smaller interrelated fragments, to index large collections of models to speed-up their querying, and to enable the collaborative construction and refinement of complex models, among other features. This paper reports on the tools provided by MONDO that Ikerlan, a medium-sized technology center which in the last decade has embraced the MBE paradigm, adopted in order to