internal void ParseXml(XPathNavigator commonNav)
        {
            XPathNavigator sourceNav = commonNav.SelectSingleNode("source");

            if (sourceNav != null)
            {
                Source = sourceNav.Value;
            }

            XPathNavigator noteNav = commonNav.SelectSingleNode("note");

            if (noteNav != null)
            {
                Note = noteNav.Value;
            }

            // Please leave this code until the data-xml/common/tags gets removed.
            XPathNavigator tagsNav = commonNav.SelectSingleNode("tags");

            if (tagsNav != null)
            {
#pragma warning disable CS0618 // Type or member is obsolete
                Tags = tagsNav.Value;
#pragma warning restore CS0618 // Type or member is obsolete
            }

            XPathNodeIterator extensionIterator = commonNav.Select("extension");

            foreach (XPathNavigator extensionNav in extensionIterator)
            {
                ThingExtension extension = DeserializeExtension(extensionNav);

                if (extension != null)
                {
                    Extensions.Add(extension);
                }
            }

            XPathNodeIterator relationshipIterator =
                commonNav.Select("related-thing[./thing-id != '' or ./client-thing-id != '']");

            foreach (XPathNavigator relationshipNav in relationshipIterator)
            {
                ThingRelationship relationship =
                    new ThingRelationship();

                relationship.ParseXml(relationshipNav);

                RelatedItems.Add(relationship);
            }

            XPathNavigator clientIdNav = commonNav.SelectSingleNode("client-thing-id");
            if (clientIdNav != null)
            {
                ClientId = clientIdNav.Value;
            }
        }
 internal void ParseRelatedAttribute(string value)
 {
     if (!string.IsNullOrEmpty(value))
     {
         var relThings = value.Split(';');
         foreach (var relThing in relThings)
         {
             Guid thingId;
             if (Guid.TryParse(relThing.Split(',')[0], out thingId))
             {
                 RelatedItems.Add(new ThingRelationship(thingId));
             }
         }
     }
 }