Remove enumerations from MacOS SystemProfiler data_type element in object, state, and item

[zport]

@julmerII commented on Tue Aug 07 2018

The MacOS SystemProfiler object, state, and item data_type elements, we're running into a tangle. OVAL specifies a valid values list (enumeration) for each (EntityObjectDataTypeType, EntityStateDataTypeType, and EntityItemDataTypeType). This list is incomplete when compared to the data_types available on the OS. As has already happened, we should probably expect Apple to add more data_types to the SystemProfiler, over time. For content authors who wish to use data_types not supported by OVAL, this causes constant XML validation error noise.

'Seems there are two options. Continually update the valid values lists for the data_type elements as Apple changes them. --OR-- Change those three elements to simple strings.

I don't see any real benefit in controlling these values. The SCAP processor can retrieve the list of valid data_types from the system being scanned and control the querying of info from the system according to those system-supplied data_type values.

I suggest we change the data_type entities to be oval-def:EntityObjectStringType and oval-sc:EntityItemStringType.

Also, per Mr. Solin's suggestion we would need to modify the documentation to direct SCAP processors to use only those data_types actually found on the machine (via system_profiler --listDataTypes).

[solind]

a5ae8d7