<http://schema.org/keywords>
"cold water, hot water, sewer, storm, gas, facilities, gas, water, provision, maquinas, machine room, Einrichtungen, Gas, Wasser Bestimmung, Gesundheit, Maschinenrauminstallations, le gaz, l'approvisionnement en eau, la sant"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bibliocad.com/library/water-and-sanitary-plumbing-in-family-housing,-various_67337>