In November 2020, Crossref formally adopted the “Principles of Open Scholarly Infrastructure” (POSI). POSI is a list of sixteen commitments that will now guide the board, staff, and Crossref’s development as an organisation into the future. This webinar took place on the 29th October at 03:00 PM AEST (UTC+10) and covered: - What are the Principles of Open Scholarly Infrastructure (POSI) and why are they needed? - Why POSI is important for Crossref and how it will help realise the Research Nexus - Open metadata and infrastructure services from Crossref Presented in English by Cameron Neylon, Professor of Research Communications, Centre for Culture and Technology, at Curtin University, Amanda Bartell, Head of Member Experience at Crossref, and Vanessa Fairhurst, Community Engagement Manager at Crossref.