The CMIS 1.1 standard says at 2.1.4.3.3 that cmis:contentStreamFileName has a Orderable property which CMIS repositories can choose to set to true or false.
As a CMIS client having a session on a particular repository, how to tell whether this repository has an Orderable of true or false for cmis:contentStreamFileName.
Preferably using DotCMIS or PortCMIS or OpenCMIS.
The Chemistry samples website has samples showing how to get repository capabilities, but not of this kind.