A multi-tiered perspective on healthcare interoperability / Craig Kuziemsky -- Standards related to interoperability in EHR & HS / -- Mário Macedo, Pedro Isaías -- LinkEHR: a platform for the normalization of legacy clinical data based on archetypes / José Alberto Maldonado, Diego Boscá, David Moner, Montserrat Robles -- Interoperability of EHR systems based on semantic representation and transformation models / Catalina Martínez-Costa, Marcos Menárguez-Tortosa, Jesualdo Tomás Fernández-Breis -- On the integration of clinical archetypes with ontologies and rules / Leonardo Lezcano -- A formal investigation of semantic interoperability of HCLS systems / Ratnesh Sahay, Antoine Zimmermann, Ronan Fox, Axel Polleres, Manfred Hauswirth -- Sensor grid enhancement with data management system for ubiquitous healthcare computing / Nikolaos Preve -- Using agent and workflow technologies for the implementation of interoperable healthcare information systems / Vassiliki Koufi, Flora Malamateniou, George Vassilacopoulos -- Enabling interoperability of patient summaries across Europe with Triplespaces / Alessio Carenini, Davide Cerri, Reto Krummenacher, Elena Simperl -- Semantic integration of patient data for clinical decision support in breast cancer care / Leonardo Lezcano, Miguel-Ángel Sicilia, Eydel Rivero.