3.1.4.1.2 wsman:SelectorSet

The WS-Management specification defines selector as a resource-relative name and value pair that acts as an instance-level discriminant. The selector set MUST be a set of these selectors, as specified in [DMTF-DSP0226] section 5.1.2.2. Rule R5.1.2.2-1 specifies that the selector names and values can be treated as case-insensitive or case-sensitive.

Web Services Management Protocol Extensions for Windows Vista  servers MUST treat all selector names and values as case-insensitive.