ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Data.Knowledge Namespace / KnowledgeGraph Class / GetDomains Method
Example Version

GetDomains Method (KnowledgeGraph)
Gets all the ArcGIS.Core.Data.Domain in this knowledge graph. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
No valid knowledge graph has been opened prior to invoking this operation.
A geodatabase-related exception has occurred.
Example
Delete Domain on KG Schemas with SchemaBuilder
await QueuedTask.Run(() =>
{
  using (var kg = GetKnowledgeGraph())
  {
    if (kg == null)
      return;

    //Get all the domains in the KG
    var domains = kg.GetDomains();
    var sb = new SchemaBuilder(kg);

    foreach (var domain in domains)
    {
      //skip the special provenance domain
      var name = domain.GetName();
      if (string.Compare(name, "esri__provenanceSourceType", true) == 0)
        continue;//skip this one

      //Delete all other domains
      if (domain is RangeDomain rd)
        sb.Delete(new RangeDomainDescription(rd));
      else if (domain is CodedValueDomain cvd)
        sb.Delete(new CodedValueDomainDescription(cvd));
    }

    try
    {
      //note: will throw an InvalidOperationException if there are no operations
      //to run. Will also delete associated fields dependent on deleted domain(s)
      if (!kg.ApplySchemaEdits(sb))
      {
        var err_msg = string.Join(",", sb.ErrorMessages.ToArray());
        System.Diagnostics.Debug.WriteLine($"Delete domains error: {err_msg}");
      }
    }
    catch (Exception ex)
    {
      System.Diagnostics.Debug.WriteLine(ex.ToString());
    }
  }
});
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.4 or higher.
See Also