https://collada.org/
COLLADA.org has moved to Khronos.org/collada
colladamovedkhronos
https://www.khronos.org/collada/
COLLADA - 3D Asset Exchange Schema
COLLADA defines an XML-based schema to make it easy to transport 3D assets between applications - enabling diverse DCC and 3D processing tools be combined into...
collada3dassetexchangeschema