The draft 9th SI Brochure is available in the BIPM website in its newest version

The most recent version of the Draft 9th SI Brochure, dated 5 February 2018, has been posted in the BIPM open website recently, together with Appendix 3 on units for photochemical and photobiological quantities.

At its 25th meeting (November 2014) the CGPM adopted a Resolution on the future revision of the International System of Units. This Resolution built on the CGPM's previous Resolution (2011), which took note of the CIPM's intention to propose a revision of the SI and set out a detailed roadmap towards the future changes.

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