IntanceDetails can be used when TModel reference specific settings or
other descriptive information are required to either describe a TModel
specific component of a service description or support services that
required additional technical data support (e.g. via settings or other
handshake operations).
The InstanceDetails structure holds service instance specific information
that is required to either understand the service implementation details
relative to a specific tModelKey reference, or to provide further parameter
and settings support.
InstanceParms is a URL pointing to the settings file, or the settings
themselves that are needed to invoke a registered service (for getting fixed
parameter values prior to a call).