I have posted the latest schema zip file reflecting the addition of the Print3D service to the FTP site at pwg-semantic-model-master2.909.zip (ftp://ftp.pwg.org/pub/pwg/sm3/schemas/) and to the SM3 GitHub site. I suggest that, if you do not have a suitable xml editor/xsd display software, e trial copy of the oxygen will do an adequate job of displaying this. Unzip the stored file and open Print3DService.xsd. We will be checking the elements in the service with the IPP 3D Extensions, something best done offline and then discussed during a conference call.
Thanks,
Bill Wagner