There are many aspects of transformation agreements that are not defined in the emerging definition of consensus. For example, if the agreement contains all the securities in a publisher`s portfolio, if the agreement includes hybrid and fully open access magazines in that portfolio, and if the payment for open access publications is ala carte or structured as an all-you-can-publish buffet offer, these are among the elements that are not specifically addressed. A transformation agreement for part of a publisher`s portfolio may be supplemented by a supplementary agreement concerning other securities or the provision of services. What do you think of Plan S? How will plan S and TAs change the world of research publishing? Share your thoughts in the comments below. A number of national and regional licensing consortia and individual institutions have already succeeded, through their libraries, in negotiating cost-neutral transformation agreements with publishers, which allow for the open access publication of 100% of their achievements. If other research-intensive organisations and national consortia follow suit, the effects become immediately visible. In the final declaration of the 14th Berlin Open Access Conference, participants from 37 nations and five continents representing research and research institutions, ministries of innovation, research and education, university federations and rectors` conferences, as well as other umbrella organisations, unanimously reaffirmed their commitment to accelerate the transition to open access through transformation agreements and invited Sayers to work with each institution or to cooperate with any consortium that wishes to take such measures. Contact the ESAC initiative to find out what steps you can take to launch such a strategy. They aim to provide readers and authors with universal open access, while limiting the escalating costs associated with for-profit journals. In the current context of the scientific publishing landscape and in line with the objectives of the Open Access 2020 Initiative, they constitute an important strategy that preserves the academic freedom of authors while accelerating the transition to open access. . . .