The medical disciplines linker represents taxonomy of the contributions. At the beginning single-level or multilevel list of medical specializations were considered as well as the possibility to adapt an existing scheme from the National library of the Czech Republic, which is based on the standard Conspectus method [B. Stoklasová, “Conspectus Method Used for Collections Mapping and Structuring of Portals”. 2006.]. However, the medical disciplines mapping according to the Conspectus method showed to be inapplicable for MEFANET purposes. Thus, an own medical disciplines linker was composed, based on various taxonomies adapted from significant medical publishing houses. It is a single level list of 48 medical specializations. It is the only obligatory structure of a portal instance and any change to it is a subject to approval of the coordinating committee of the MEFANET project.