IHandler
Implement the IHandler interface to retrieve information from an external system.
| Initialize | Initializes a metadata binding handler. |
| ResolveIds | Gets the minimal metadata required for the supplied field and list of ids from the external system. |
| RetrieveTags | Gets the minimal metadata for the supplied field and inputFilter from the external system. Inside each tag, |
| RetrieveTagStructure | Gets the entire hierarchical structure and the minimal metadata for the supplied field from the external system. Inside each tag, |
| Validate | Checks whether the supplied ids are still present in the external system and are valid for the given field. |