EPUB 3 Structural Semantics Vocabulary 1.1 publication history Date Status 21 December 2023 Note 19 May 2023 Note 10 May 2023 Note 2 April 2023 Note 30 March 2023 Note 13 January 2023 Note 4 January 2023 Note 10 August 2022 Note 24 July 2022 Note 24 June 2022 Note 19 May 2022 Note 17 May 2022 Note 20 April 2022 Note 19 April 2022 Note 15 April 2022 Note 14 April 2022 Note 11 April 2022 Note 6 April 2022 Note 31 March 2022 Note 10 March 2022 Note 8 December 2021 Note 26 November 2021 Note 4 November 2021 Note