public enum KnowledgeGraphNamedObjectTypeRole : System.Enum, System.IComparable, System.IConvertible, System.IFormattable, System.ISpanFormattable  

//Provenance entity type is stored as a MetaEntityType 
QueuedTask.Run(() =>
{
  //Create a connection properties
  var kg_props =
      new KnowledgeGraphConnectionProperties(new Uri(url));
  using (var kg = new KnowledgeGraph(kg_props))
  {
    //Get the KnowledgeGraph Data Model
    using (var kg_dm = kg.GetDataModel())
    {
      var dict_types = kg_dm.GetMetaEntityTypes();
      //If there is no provenance then MetaEntityTypes will be
      //an empty collection
      foreach (var kvp in dict_types)
      {
        var meta_entity_type = kvp.Value;
        if (meta_entity_type.GetRole() ==
            KnowledgeGraphNamedObjectTypeRole.Provenance)
        {
          //TODO - use the provenance entity type
          var name = meta_entity_type.GetName();

        }
      }

    }
  }
});

internal string GetProvenanceEntityTypeName(KnowledgeGraphDataModel kg_dm)
{
  var entity_types = kg_dm.GetMetaEntityTypes();
  foreach (var entity_type in entity_types)
  {
    if (entity_type.Value.GetRole() == KnowledgeGraphNamedObjectTypeRole.Provenance)
      return entity_type.Value.GetName();
  }
  return "";
}
internal bool KnowledgeGraphSupportsProvenance(KnowledgeGraph kg)
{
  //if there is a provenance entity type then the KnowledgeGraph
  //supports provenance
  return !string.IsNullOrEmpty(
    GetProvenanceEntityTypeName(kg.GetDataModel()));


  // OR use the KnowledgeGraphPropertyInfo
  var propInfo = kg.GetPropertyNameInfo();
  return propInfo.SupportsProvenance;
}

QueuedTask.Run(() =>
{
  //Create a connection properties
  var kg_props =
      new KnowledgeGraphConnectionProperties(new Uri(url));
  using (var kg = new KnowledgeGraph(kg_props))
  {
    //Get the KnowledgeGraph Data Model
    using (var kg_dm = kg.GetDataModel())
    {
      var dict_types = kg_dm.GetEntityTypes();

      foreach (var kvp in dict_types)
      {
        var entity_type = kvp.Value;
        var role = entity_type.GetRole();
        //note "name" will be the same name as the corresponding
        //feature class or table in the KG's relational gdb model
        var name = entity_type.GetName();
        var alias = entity_type.GetAliasName();
        var objectIDPropertyName = entity_type.GetObjectIDPropertyName();
        //etc

      }

    }
  }
});

internal string GetDocumentEntityTypeName(KnowledgeGraphDataModel kg_dm)
{
  var entity_types = kg_dm.GetEntityTypes();
  foreach (var entity_type in entity_types)
  {
    var role = entity_type.Value.GetRole();
    if (role == KnowledgeGraphNamedObjectTypeRole.Document)
      return entity_type.Value.GetName();
  }
  return "";//Unusual - probably Neo4j user-managed
}

internal bool KnowledgeGraphHasDocumentType(KnowledgeGraph kg)
{
  //uncommon for there not to be a document type
  return !string.IsNullOrEmpty(
    GetDocumentEntityTypeName(kg.GetDataModel()));
}

QueuedTask.Run(() =>
{
  //Create a connection properties
  var kg_props =
      new KnowledgeGraphConnectionProperties(new Uri(url));
  using (var kg = new KnowledgeGraph(kg_props))
  {
    //Get the KnowledgeGraph Data Model
    using (var kg_dm = kg.GetDataModel())
    {
      var dict_types = kg_dm.GetRelationshipTypes();

      foreach (var kvp in dict_types)
      {
        var rel_type = kvp.Value;
        var role = rel_type.GetRole();
        //note "name" will be the same name as the corresponding
        //feature class or table in the KG's relational gdb model
        var name = rel_type.GetName();
        //etc.
        //Get relationship end points
        var end_points = rel_type.GetEndPoints();
        foreach (var end_point in end_points)
        {
          System.Diagnostics.Debug.WriteLine(
            $"Origin: '{end_point.GetOriginEntityTypeName()}', " +
            $"Destination: '{end_point.GetDestinationEntityTypeName()}'");
        }
      }

    }
  }
});

QueuedTask.Run(() =>
{
  //Create a connection properties
  var kg_props =
      new KnowledgeGraphConnectionProperties(new Uri(url));
  using (var kg = new KnowledgeGraph(kg_props))
  {
    //Get the KnowledgeGraph Data Model
    using (var kg_datamodel = kg.GetDataModel())
    {
      var entities = kg_datamodel.GetEntityTypes();
      var relationships = kg_datamodel.GetRelationshipTypes();
      var provenance = kg_datamodel.GetMetaEntityTypes();

      var all_graph_types = new List<KnowledgeGraphNamedObjectType>();
      all_graph_types.AddRange(entities.Values);
      all_graph_types.AddRange(relationships.Values);
      all_graph_types.AddRange(provenance.Values);

      System.Diagnostics.Debug.WriteLine("\r\nGraph Types");

      int c = 0;
      foreach (var graph_type in all_graph_types)
      {
        var type_name = graph_type.GetName();
        var role = graph_type.GetRole().ToString();

        //equivalent to:
        //var fields = featClassDef.GetFields().Select(f => f.Name).ToList();
        //var field_names = string.Join(",", fields);
        var props = graph_type.GetProperties().Select(p => p.Name).ToList();
        var prop_names = string.Join(",", props);

        System.Diagnostics.Debug.WriteLine($"[{c++}]: " +
            $"{type_name}, {role}, {prop_names}");
      }
    }
  }
});

internal static string GetDocumentTypeName(KnowledgeGraphDataModel kg_dm)
{
  var entity_types = kg_dm.GetEntityTypes();
  foreach (var entity_type in entity_types)
  {
    var role = entity_type.Value.GetRole();
    if (role == KnowledgeGraphNamedObjectTypeRole.Document)
      return entity_type.Value.GetName();
  }
  return "";
}

internal static string GetHasDocumentTypeName(KnowledgeGraphDataModel kg_dm)
{
  var rel_types = kg_dm.GetRelationshipTypes();
  foreach (var rel_type in rel_types)
  {
    var role = rel_type.Value.GetRole();
    if (role == KnowledgeGraphNamedObjectTypeRole.Document)
      return rel_type.Value.GetName();
  }
  return "";
}

internal async void AddDocumentRecord()
{

  await QueuedTask.Run(() =>
  {
    using (var kg = GetKnowledgeGraph())
    {
      var edit_op = new EditOperation()
      {
        Name = "Create Document Example",
        SelectNewFeatures = true
      };

      var doc_entity_name = GetDocumentTypeName(kg.GetDataModel());
      if (string.IsNullOrEmpty(doc_entity_name))
        return false;
      var hasdoc_rel_name = GetHasDocumentTypeName(kg.GetDataModel());
      if (string.IsNullOrEmpty(hasdoc_rel_name))
        return false;

      //Document can also be FeatureClass
      var doc_tbl = kg.OpenDataset<Table>(doc_entity_name);
      var doc_rel_tbl = kg.OpenDataset<Table>(hasdoc_rel_name);

      //This is the document to be added...file, image, resource, etc.
      var url = @"E:\Data\Temp\HelloWorld.txt";
      var text = System.IO.File.ReadAllText(url);

      //Set document properties
      var attribs = new Dictionary<string, object>();
      attribs["contentType"] = @"text/plain";
      attribs["name"] = System.IO.Path.GetFileName(url);
      attribs["url"] = url;
      //Add geometry if relevant
      //attribs["Shape"] = doc_location;

      //optional
      attribs["fileExtension"] = System.IO.Path.GetExtension(url);
      attribs["text"] = System.IO.File.ReadAllText(url);

      //optional and arbitrary - your choice
      attribs["title"] = System.IO.Path.GetFileNameWithoutExtension(url);
      attribs["keywords"] = @"text,file,example";
      attribs["metadata"] = "";

      //Specify any additional custom attributes added to the document
      //schema by the user as needed....
      //attribs["custom_attrib"] = "Foo";
      //attribs["custom_attrib2"] = "Bar";

      //Get the entity whose document this is...
      var org_fc = kg.OpenDataset<FeatureClass>("Organization");
      var qf = new QueryFilter()
      {
        WhereClause = "name = 'Acme'",
        SubFields = "*"
      };
      var origin_org_id = Guid.Empty;
      using (var rc = org_fc.Search(qf))
      {
        if (!rc.MoveNext())
          return false;
        origin_org_id = rc.Current.GetGlobalID();//For the relate
      }

      //Create the document row/feature
      var rowtoken = edit_op.Create(doc_tbl, attribs);
      if (edit_op.Execute())
      {
        //Create the relationship row
        attribs.Clear();
        //we need the names of the origin and destination relation properties
        var kg_prop_info = kg.GetPropertyNameInfo();
        //Specify the origin entity (i.e. the document 'owner') and
        //the document being related to (i.e. the document 'itself')
        attribs[kg_prop_info.OriginIDPropertyName] = origin_org_id;//entity
        attribs[kg_prop_info.DestinationIDPropertyName] = rowtoken.GlobalID;//document

        //Specify any custom attributes added to the has document
        //schema by the user as needed....
        //attribs["custom_attrib"] = "Foo";
        //attribs["custom_attrib2"] = "Bar";

        //"Chain" a second create for the relationship - this ensures that
        //Both creates (doc _and_ "has doc" relation) will be -undone- together if needed
        //....in other words they will behave as if they are a -single- transaction
        var edit_op_rel = edit_op.CreateChainedOperation();
        edit_op_rel.Create(doc_rel_tbl, attribs);
        return edit_op_rel.Execute();
      }
    }
    return false;
  });
}