Simple Reference SelectionSpec

Use
SelectionSpec
references to avoid writing duplicate
TraversalSpec
declarations.
The
TraversalSpec
identified in a
SelectionSpec
reference must be within the same
PropertyFilterSpec
. Figure 1 shows the use of
SelectionSpec
references to a virtual machine
TraversalSpec
. The
SelectionSpec
references are associated with
Network
and
Datastore
traversals.
SelectionSpec Reference
Shows the use of Selection Spec to make Traversal Spec queries more
					precise.
If the
ObjectSpec.selectSet
array contains a
SelectionSpec
, the referenced
TraversalSpec
must identify the same object type.
TraversalSpec.type
must match the type of the object specified in
ObjectSpec.obj
. The
PropertyCollector
applies the
TraversalSpec
to the object and uses the
TraversalSpec.path
property to extend its traversal.