The agreement is a crucial part of our living together. Important opportunities for sharing resources, integrating systems and collaborating depend on our ability to agree. While we are interested in methods and technologies that support shared agreement, we somehow tend to forget the disagreement; indeed, it is also a part of reality.
In the Semantic Web field, most of research activities investigate ontology agreement and its formalization, rather than the disagreement and the best practices about its extended use.
We claim that the industrial uptake of the Semantic Web is severely limited by the fact that, in the real world, shared agreements are difficult to reach and maintain and that “agreeing while disagreeing” is a common practice. In this paper we illustrate a best practice, which we learned from practical experience, that makes use of an (almost) unexplored potentiality of the Semantic Web to express disagreement, and we describe its use in the e-employment sector.