1 | http://itu.int |
2 | http://www.iso.org |
3 | http://www.iec.ch |
4 | https://www.ieee.org |
5 | https://www.ietf.org |
6 | http://openmobilealliance.org |
7 | https://www.w3.org |
8 | http://www.opengeospatial.org |
9 | http://www.isotc211.org |
10 | http://www.buildingsmart.org |
11 | http://www.web3d.org |
12 | https://www.oasis-open.org |
13 | http://www.sig3d.org |
14 | http://www.citygmlwiki.org/index.php/CityGML-ADEs |