page provides access to technical documents, test cases and other resources for IP offices wishing to participate in the DAS system.

At present, there are two protocols available for document exchange between WIPO-DAS and national patent Offices which wish to offer the exchange service via DAS.

Trilateral Document Access (TDA) 1.7.2 is the current version of the exchange protocol used betwwen WIPO-DAS and Route C Offices (JPO, KIPO and USPTO).

For other national IP Offices, PCT-EDI is an alternative based on Secure File Transfer Protocol (SFTP). This would require an account-based communication using Public-Key Infrastructure (PKI).