<https://www.portalservicios.com/que-es-el-bim-el-sistema-colaborativo-para-la-construccion/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.portalservicios.com/que-es-el-bim-el-sistema-colaborativo-para-la-construccion/>