private QueryNode BindNonRootSegment(SegmentQueryToken segmentToken)
		{
			Debug.Assert(segmentToken != null, "segmentToken != null");
			Debug.Assert(segmentToken.Parent != null, "Only root segments should be allowed here.");
			Debug.Assert(!string.IsNullOrEmpty(segmentToken.Name), "!string.IsNullOrEmpty(segmentToken.Name)");

			//// This is a metadata-only version of the RequestUriProcessor.CreateFirstSegment.

			if (segmentToken.Name == UriQueryConstants.MetadataSegment || segmentToken.Name == UriQueryConstants.BatchSegment)
			{
				// TODO: $metadata segment parsing - no key values are allowed.
				// TODO: $batch segment parsing - no key values are allowed.
				throw new NotImplementedException();
			}

			// TODO: WCF DS checks for $count here first and fails. But not for the other $ segments.
			// which means other $segments get to SO resolution. On the other hand the WCF DS would eventually fail if an SO started with $.

			// Look for a service operation
			ServiceOperationWrapper serviceOperation = this.metadataProvider.TryResolveServiceOperation(segmentToken.Name);
			if (serviceOperation != null)
			{
				return this.BindServiceOperation(segmentToken, serviceOperation);
			}

			// TODO: Content-ID reference resolution. Do we actually do anything here or do we perform this through extending the metadata binder?

			// Look for an entity set.
			ResourceSetWrapper resourceSet = this.metadataProvider.TryResolveResourceSet(segmentToken.Name);
			if (resourceSet == null)
			{
				throw new ODataException(Strings.MetadataBinder_RootSegmentResourceNotFound(segmentToken.Name));
			}

			ResourceSetQueryNode resourceSetQueryNode = new ResourceSetQueryNode()
			{
				ResourceSet = resourceSet.ResourceSet
			};

			if (segmentToken.NamedValues != null)
			{
				return this.BindKeyValues(resourceSetQueryNode, segmentToken.NamedValues);
			}
			else
			{
				return resourceSetQueryNode;
			}
		}
 /// <summary>
 /// Translates a resource set node.
 /// </summary>
 /// <param name="resourceSetNode">The resource set query node to translate.</param>
 /// <returns>Expression which evaluates to IQueryable&lt;T&gt; where T is the InstanceType of the ResourceType of the resource set.</returns>
 protected abstract Expression TranslateResourceSet(ResourceSetQueryNode resourceSetNode);