Retrieving information from another EU Member State using OOTS is based on the link to the Data Retrieval Finland service provided by the KEHA Centre to the e-service. The organisation should add the link to the e-service in the desired location. To create a link, the KEHA Centre needs the names of the e-service organisation and the service offered in the e-service. In addition, if the user is to be redirected from the Data Retrieval Finland service to the organisation's e-service, the KEHA Centre also needs to know the e-service’s callback URL.
The KEHA Centre uses this information to create a link for the e-service, consisting of the address of the Data Retrieval Finland service and the Integration ID of the service. The Integration ID in the link enables the Data Retrieval Finland service to generate the information necessary to retrieve information from another EU Member State.
The final Data Retrieval is generated by a link from the e-service to the Data Retrieval Finland service, which may include the following in addition to the Integration ID:
- an External ID, which can be used to link the information received by the e-service from the Data Retrieval Finland service to the user
- service session data that can be used to redirect the user from the Data Retrieval Finland service back to their session in the e-service.