Project Abstract: Logic Atlas and Integrator (LATIN) ⋆ Mihai Codescu 1 , Fulya Horozal 2 , Michael Kohlhase 2 , Till Mossakowski 1 , and Florian Rabe 2 1 Safe and Secure Cognitive Systems, German Research Centre for Artificial Intelligence (DFKI), Bremen, Germany 2 Computer Science, Jacobs University Bremen, Germany http://latin.omdoc.org LATIN aims at developing methods, techniques, and tools for interfacing logics and related formal systems. These systems are at the core of mathematics and computer science and are implemented in systems like (semi-)automated theorem provers, model checkers, computer algebra systems, constraint solvers, or concept classifiers. Unfortunately, these systems have differing domains of applications, foundational assumptions, and input languages, which makes them non-interoperable and difficult to compare and evaluate in practice. The LATIN project develops a foundationally unconstrained framework for the representation of logics and translations between them [9,1]. The LATIN framework (i) subsumes existing proof theoretical frameworks such as LF and model theoretical frameworks such as institutions [3] and (ii) supplants them with a uniform knowledge representation language based on OMDoc. Special attention is paid to generality, modularity, scalability, extensibility, and interop- erability. L Syn Base L Pf L Mod F L mod L pf M L truth L sound Logics are represented as theories and translations as theory morphisms. Logic representations formalize the syn- tax, proof theory, and model theory of a logic within the LATIN framework. The representations of the model theory are parametric in the foundation of mathe- matics, which is represented as a theory itself; then individual models are repre- sented as theory morphisms into the foundation. This can be represented in a diagram such as the one above, where the syntax of a logic L is represented as a theory L Syn , which is then extended with the representation of proof rules to represent the proof theory as L pf . Moreover, the model theory of the logic can be represented as a theory L Mod , based on the representation of a foun- dation F which is included the model theory; the models are represented by the arrow M . The Base theory represents the type of formulas and the notion of truth for them. Moreover, we can represent soundness proofs as a morphism ⋆ The LATIN project is supported by the Deutsche Forschungsgemeinschaft (DFG) within grant KO 2428/9-1.