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The following diagram describes the exchange flows for registration and retrieval of documents hosted in WIPO DAS and the OSF checking on regular basis statuses of retrievals requests
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Exchange flow to register document
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| Step | API Request | Notes |
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| (1a) - OFF requests a pre-signed URL from WIPO DAS to upload a file identified by a file id | POST /das/v1/requests/files/url-uploads |
| (1b) - OFF uploads the corrected document file content using a pre-signed URL given in step (1a) |
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| | (1c) - OFF requests document registration to WIPO DAS by referring to the uploaded file content by the corresponding file id | PUT /das/v1/requests/registrations |
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Exchange flow to retrieve document hosted in WIPO DAS
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(2a) - OSF sends a document retrieval request to WIPO DAS and receives a request acknowledgement id | POST /das/v1/requests/retrievals | | (2b) - WIPO DAS prepares the requested document for download and notifies the OSF of the document availability (i.e. Figure A) by referring to the request acknowledgement id returned in step (2a) | POST /das/v1/requests/notifications | Alternatively , OSF may use the check status (i.e. Figure B) to download the document content when it is reported as available by WIPO DAS (i.e. GET /das/v1/requests/retrievals) | (2c) - OSF retrieves file location URL from WIPO DAS to download the document file content | POST /das/v1/requests/url-downloads | Downloads can be repeated while the requested document is not deleted from WIPO DAS | (2d) - OSF downloads file from WIPO DAS | | (2e) - Optionally OSF deletes the download files from the DAS transit zone | 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) | | Column |
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|  Image Removed
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| Fig. A | Fig. B
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