Domains

Domains

User-defined attributes can be created using common data types, such as numbers or strings. They can also be limited to a specified enumeration of values. A list of possible values such an attribute can have is called a “domain.” Each domain corresponds to a single table in the database. Domains are created using the Structure.AddDomainTable() method.

The following line creates a “DEMO_MAINTENANCE_TYPE_TBD” domain:

AddDomainTable(
    "DEMO_MAINTENANCE_TYPE_TBD", 
    "DEMO MAINTENANCE TYPE"); 

Domain Values

Values within a domain are added individually. The following code adds three new values to the DEMO_MAINTAINENANCE_TYPE_TBD domain: “u”, “o”, and “tbd”:

AddDomainEntry("DEMO_MAINTENANCE_TYPE_TBD", 
   1, 
   "unknown", 
   "u", 
   "description", 
   true);
 
AddDomainEntry("DEMO_MAINTENANCE_TYPE_TBD", 
   10000, 
   "other", 
   "o", 
   "description"
   true);
 
AddDomainEntry("DEMO_MAINTENANCE_TYPE_TBD", 
   10001, 
   "to be determined", 
   "tbd", 
   "description"
   true);

Domain Relations

A domain relationship is used to set a particular attribute to use the defined domain. The following line sets the ID_MAINTENANCE_TYPE attribute of the DEMO_MAINTENANCE feature class to use the DEMO_MAINTENANCE_TYPE_TBD domain:

AddRelationToDomain(
    "DEMO_MAINTENANCE_TYPE_TBD", 
    "DEMO_MAINTENANCE", 
    "ID_MAINTENANCE_TYPE");