COLLADA is short for Collaborative Design Activity. DAE files are based on the XML COLLADA format, and they are used by various graphics programs to exchange digital assets under the same format. Each file consists of a set of elements that are images, lights, geometries, effects, materials, cameras, etc.
The main Teigha PRC example for “how to create” is the OdPrcCreate example located in the \Prc\Examples\OdPrcCreate folder. The release package includes a prebuilt OdPrcCreate.exe application in the “exe” folder. Also a project file is available in the release packages (for Microsoft® Windows®). So it is possible to start the prebuilt application or debug it using Microsoft Visual Studio.
With the new release of Teigha 4.3.1, you can attach digital signatures to your .dwg files and validate a .dwg file’s digital signature. A digital signature indicates who the file came from and the file’s state when the digital signature was created, and validation confirms this information.