Populating a Topic Map With Data

The main use for the client is to create topic map data, e.g. topics, topic properties and associations. The following example shows how to create topic map data. Notice how it uses the subject identifiers (from the SchemaConstants class) for types  and not the schema objects.

      /// <summary>

      /// Populates the topic map with two topics and an association between them

      /// </summary>

      /// <param name="tmUri">The web address of the topic map to be populated</param>

      /// <returns>The web address of the person topic created</returns>

      private static Uri CreatePerson(Uri tmUri)

       {

          // create a topic map service client and retrieve the specified topic map

          var client = new TopicMapServiceClient();

          var tm = client.GetTopicMap(tmUri);

          // create a new topic with a single label and a subject identifier

          var gra = tm.CreateTopic("graham", "en", new Uri("http://www.networkedplanet.com/people/gra"));

          // set the type on the topic

           gra.AddType(new Uri(SchemaConstants.Person));

          // add an age and description property

           gra.AddProperty(new Uri(SchemaConstants.Age), new Uri(OccurrenceDataTypes.Int), 23);

           gra.AddProperty(new Uri(SchemaConstants.Description), new Uri(OccurrenceDataTypes.String), "Graham Moore is director of Networked Planet");

          // create the topic networkedplanet

          var np = tm.CreateTopic("networked planet", "en", new Uri("http://www.networkedplanet.com/companies/networkedplanet"));

           np.AddType(new Uri(SchemaConstants.Company));

          // create an associatin between graham and networked planet

           tm.CreateAssociation(new Uri(SchemaConstants.WorksFor),

                                gra.WebAddress, new Uri(SchemaConstants.Employee),

                                np.WebAddress, new Uri(SchemaConstants.Employer));

          // save all the changes to the topic map

           tm.SaveChanges();

          return gra.WebAddress;

       }