Presently, there are 4 possible use cases in the current existing technical arrangements of TDA/pdx. The below use cases are examples of how to replace the TDA-based exchange using the new DAS Rest API.

Use Case 1 - Document Registration by OFF to WIPO DAS

Existing flow operated with TDA/pdxNew flow using DAS Rest API
 IP5 (OFF) --- dasRegRequest ---> WIPO DAS. As a result, OFF receives an ackIdPOST
https://{wipo-hostname}/am/oauth2/access_token		IP5 (OFF) uses the OFF private key to generate the JWT client assertion (see more details) to request a valid access-token to WIPO DAS
POST
https://{wipo-hostname}/requests/registrations		IP5 (OFF) sends a document registration request without document content (similarly to the TDA/pdx), receives an ackId and the request status 
 
WIPO DAS ---- dasRegResponse --> IP5 (OFF). As a result, OFF receives the ackId and related registration status 

Use Case 2 - Document De-registration by OFF to WIPO DAS

There is a special arrangement to allow the OFF to deregister a document by sending a dasRegRequest request with the registered document details but with the das-access-code as 'unregister'. 

Existing flow operated with TDA/pdxNew flow using DAS Rest API
 IP5 (OFF) --- dasRegRequest ---> WIPO DAS. As a result, OFF receives an ackIdPOST
https://{wipo-hostname}/am/oauth2/access_token		IP5 (OFF) uses the OFF private key to generate the JWT client assertion (see more details) to request a valid access-token to WIPO DAS
DELETE 
https://{wipo-hostname}/requests/registrations		IP5 (OFF) sends a document deregistration request to WIPO DAS
 
WIPO DAS ---- dasRegResponse --> IP5 (OFF). As a result, OFF receives the ackId and related registration status 


Use Case 3 - Document Retrieval to WIPO DAS by OSF

Existing flow operated with TDA/pdxNew flow using DAS Rest API with notifications of document availability
IP5 (OSF) --- pdRequest ---> WIPO DAS. As a result, OSF receives an ackIdPOST
https://{wipo-hostname}/am/oauth2/access_token		IP5 (OSF) uses the OSF private key to generate the JWT client assertion (see more details) to request a valid access-token to WIPO DAS
POST
https://{wipo-hostname}/requests/retrievals		IP5 (OSF) sends a document retrieval request, receives an ackId and the request status 
WIPO DAS ---- pdResponse --> IP5 (OSF). As a result, OSF receives the ackId and the requested document  



POST
https://{osf-hostname}/oauth2/access_token		WIPO DAS uses the WIPO private key to generate the JWT client assertion to request a valid access-token to OSF
POST
https://{off-hostname}/requests/notifications		WIPO DAS notifies OSF of the availability of documents 
POST
https://{wipo-hostname}/am/oauth2/access_token		IP5 (OSF) uses the OSF private key to generate the JWT client assertion to request a valid access-token to WIPO DAS
GET 
https://{wipo-hostname}/requests/retrievals		IP5 (OSF) downloads the requested documents one by one

Note: There is no document size limitation

Use Case 4 - Document Retrieval to OFF by WIPO DAS

Existing flow operated with TDA/pdxNew flow using DAS Rest API with notifications of document availability
WIPO DAS --- pdRequest ---> IP5 (OFF). As a result, WIPO DAS receives an ackIdPOST
https://{off-hostname}/oauth2/access_token		WIPO DAS uses the WIPO private key to generate the JWT client assertion (see more details) to request a valid access-token to OFF
POST
https://{off-hostname}/requests/retrievals		WIPO DAS sends a document retrieval request, receives an ackId and the request status 
IP5 (OFF) ---- pdResponse --> WIPO DAS. As a result, WIPO DAS receives the ackId and the requested document



POST
https://{wipo-hostname}/am/oauth2/access_token		OFF uses the OFF private key to generate the JWT client assertion to request a valid access-token to WIPO DAS
POST
https://{wipo-hostname}/requests/notifications		OFF notifies WIPO DAS of the availability of documents 
POST
https://{off-hostname}/oauth2/access_token		WIPO DAS uses the WIPO private key to generate the JWT client assertion to request a valid access-token to OFF
GET 
https://{off-hostname}/requests/retrievals		WIPO DAS downloads the requested documents one by one

Note: There is no document size limitation