In order to be able to guarantee the high standard established in railway vehicle in terms of availability, reproducibility and safety in the adhesive technology, with the ECARV has established a European working group for the interpretation and practical implementation of the EN 17460. The rules decided by the member in this working group are recorded in the A-Z guideline and are mandatory for all companies in this database. In order to be included in the database, companies must be certified by a Certification Bodies accepted by this working group.