Recent News

Based on our survey, solving configuration errors and activating inactive features are two main challenges faced by today's configurator users. This paper proposes a new concept, range fixes, to assist users dealing with the two challenges. A technical report version of the paper can be found here.

We have been working very intensively on Clafer in the last couple of months.
The Clafer translator got updated to version 0.1, which brought a few extensions to the language and changes to syntax. If you play with the online translator, you will notice that the translator can output models in several new formats:

• XML format with intermediate representation (IR) of the model. IR allows to combine the Clafer translator with other tools that further process Clafer models.

This paper summarizes our findings in our online survey about configuration challenges.

We have conducted an online survey about what challenges are faced by the users of modern configuration tools. The result was published here as a technical report.

The website got updated with two online tools. You can try them without having to download and compile source code. CDL to Clafer translator takes an eCos' variability model specified in the CDL language and outputs corresponding Clafer model. We believe the Clafer model is easier to read and comprehend. It is also analyzable by SAT/SMT solvers.

In the lab we investigate variability models that are used in large software projects. We also work on Clafer, which is a language for modeling software product lines and representing variabilities. Those two lines of research emerged recently. As a result we present a repository of realistic variability models in Clafer. The two preliminary models include the Linux kernel and eCos. Clafer documentation contains additional information about the language and a tutorial.

In this showcase we present algorithms for finding syntactic and semantic mismatches between two BPMN models. The algorithms are based on graph matching and computational tree logics. We present practical implementations on top of Eclipse, EMF/GMF, VIATRA2 and TAPAs. The showcase is being presented in November, 7th - 10th, at the CASCON 2011 (https://www-927.ibm.com/ibm/cas/cascon/). See you there!

The purpose of the attached document is to demonstrate how a complex family of concepts can be modeled using Clafer. The document presents an exact record of the actual analysis performed by the author and shows a typical evolution of the concept definitions when using the “concrete-to-abstract” modeling approach.

Basic knowledge of Clafer is assumed. Refer to Concept Modeling Using Clafer - Tutorial for a thorough introduction.