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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Barcos</topic></authority><related type="narrower"><topic>Barcos de carga</topic></related><related type="narrower"><topic>Barcos de guerra</topic></related><related type="narrower"><topic>Barcos de vapor</topic></related><related type="narrower"><topic>Barcos de vela</topic></related><related type="narrower"><topic>Barcos mercantes</topic></related><related type="narrower"><topic>Barcos nucleares</topic></related><related type="narrower"><topic>Barcos oceanográficos</topic></related><related type="narrower"><topic>Barcos pesqueros</topic></related><related type="narrower"><topic>Barcos remolcadores</topic></related><related type="narrower"><topic>Embarcaciones neumáticas</topic></related><related type="narrower"><topic>Submarinos</topic></related><related type="narrower"><topic>Transatlánticos</topic></related><related type="narrower"><topic>Yates</topic></related><related type="other"><topic>Marineros</topic></related><related type="other"><topic>Ingeniería naval</topic></related><related type="other"><topic>Canoas</topic></related><related type="other"><topic>Arquitectura naval</topic></related><related type="other"><topic>Navegación</topic></related><related type="broader"><topic>Transportes marítimos</topic></related><variant type="other"><topic>Navíos</topic></variant><variant type="other"><topic>Naves</topic></variant><variant type="other"><topic>Buques</topic></variant><variant type="other"><topic>Botes</topic></variant></mads>