The following diagram describes the exchange flows for registration and retrieval of documents hosted in OFF but big-sized documents can be transmitted through the DAS transit zone


Exchange flow to retrieve document transmitted by OFF to WIPO DAS transit zone

  1. OSF sends a document retrieval request to WIPO DAS and receives a request acknowledgement id issued by WIPO DAS (i.e. POST /das/v1/requests/retrievals) 
  2. WIPO DAS forwards the retrieval request to the OFF and receives a request acknowledgement id issued by OFF (i.e. POST /das/v1/requests/retrievals) 
  3. OFF requests a presigned url from WIPO DAS to upload a file and receives the file id from WIPO DAS (i.e. POST /das/v1/requests/url-uploads)
  4. OFF uploads the requested document file content into DAS transit zone using a presigned url given in step 3
  5. OFF notifies WIPO DAS of the document availability by referring to the request acknowledgement id returned in step 2 (i.e. POST /das/v1/requests/notifications) 
  6. WIPO DAS prepares the requested document for download by OSF and notifies the OSF of the document availability by referring to the request acknowledgement id returned in step 1 (i.e. POST /das/v1/requests/notifications) 
  7. OSF retrieves the file location URL to download the document file content by referring to the request acknowledgement id returned in step 1 (i.e. GET /das/v1/requests/files/url-downloads)
  8. OSF downloads the file using the URL obtained in step 8
  9. Optionally OSF deletes the download file from the DAS transit zone (i.e. DELETE /das/v1/requests/files) 
If OSF does not delete the downloaded file, WIPO DAS will delete it after a pre-defined period (e.g. 1 week)

New DAS exchange API



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