https://www.epo.org/en/service-support/faq/myepo-services/online-filing-software/filing-sequence-listings/what-file
What file formats are allowed under WIPO Standard ST.26?
Once WIPO Standard ST.26 comes into effect on 1 July 2022, you will have to attach your sequence listing either as an XML file or as a ZIP file (containing one XML file).
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