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Given the above example, we know what a model transformation contract must contain two kinds of constraints: First, it must specify constraints on source and target models and

• a set of constraints on the evolution of elements from the source to the target model The last set of constraints is generally defined under the form of pre- and

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We then focus on the activity provoked by single posts and analyze the behavior of single users, concentrating on the most active ones.. 3.1 Global

To analyze relationships between community characteristics and (self-)regulation principles within different socio-cultural contexts we randomly selected by means of a web