On 9/14/2021 9:37 AM, Jordan Brown wrote: > Ideal would be if the 3MF Consortium managed a shared attribute > definition list. And indeed, to at least some extent, they do. https://github.com/3MFConsortium/spec_core/blob/master/3MF%20Core%20Specification.md Chapter 5 discusses specifying materials and colors. The "Print Ticket" mechanism is not described in the spec, but appears to be intended to carry arbitrary printing instructions.  It looks like Microsoft may be driving that effort. https://docs.microsoft.com/en-us/windows-hardware/drivers/3dprint/print-schema-keywords-for-3d-manufacturing et seq.