return {
    name = "stix-two-math",
    version = "1.00",
    comment = "Goodies that complement stix two opentype.",
    author = "Hans Hagen & Mikael Sundqvist",
    copyright = "ConTeXt development team",
    mathematics = {
        alternates = {
            calligraphic = { feature = 'ss01', value = 1, comment = "Mathematical Alternative Calligraphic Characters" },
            italic       = { feature = 'ss02', value = 1, comment = "Mathematical Alternative Lowercase Italic" },
            barred       = { feature = 'ss03', value = 1, comment = "Mathematical Alternative Barred Characters" }, -- hbar, lambdabar etc
            primes       = { feature = 'ss04', value = 1, comment = "Mathematical Alternative Primes" },            -- larger/lower primes, minute etc
            arrow        = { feature = 'ss05', value = 1, comment = "Mathematical Alternative Smaller Arrows" },
            narrower     = { feature = 'ss06', value = 1, comment = "Mathematical Alternative Narrower Elements" }, -- narrower/shorter element etc
            small        = { feature = 'ss07', value = 1, comment = "Mathematical Alternative Smaller Operators" },
            upright      = { feature = 'ss08', value = 1, comment = "Mathematical Alternative Upright Symbols" },   -- upright integrals etc.
            negated      = { feature = 'ss09', value = 1, comment = "Mathematical Alternative Negated Symbols" },
            relation     = { feature = 'ss10', value = 1, comment = "Mathematical Alternative Relations" },
            negatedset   = { feature = 'ss09', value = 1, comment = "Mathematical Alternative Negated Set Symbols" },
         -- todo         = { feature = 'ss14', value = 1, comment = "" },
            circled      = { feature = 'ss16', value = 1, comment = "Mathematical Alternative Circled Operators" },
        },
        parameters = {
            NoLimitSupFactor =    0,
            NoLimitSubFactor = 1000,
            -- AccentBaseHeight = 0,
            AccentBaseDepth  = 30,
        },
        tweaks = {
            aftercopying = {
                {
                    tweak    = "version",
                    expected = "Version 2.12 b168",
                },
                -- 0xFEOO should be chancery style, if present
                {
                    tweak    = "variants",
                    kind     = "script",
                 -- feature  = false, -- use the saved ones (see typescript)
                    selector = 0xFE00,
                },
                -- 0xFEO1 should be roundhand style, if present                
                {
                    tweak    = "variants",
                    kind     = "script",
                    feature  = "ss01",-- this changes to roundhand style for stixtwo
                    selector = 0xFE01,
                },
                {
                    tweak = "dimensions",
                    list  = {
                        -- [0x00060] = { yoffset = -0.035 }, -- grave
                        -- [0x000B4] = { yoffset = -0.035 }, -- acute
                        -- [0x002C6] = { yoffset = -0.035 }, -- hat
                        -- [0x002DC] = { yoffset = -0.035 }, -- tilde
                        -- [0x000AF] = { yoffset = -0.05 }, -- bar
                        -- [0x002D8] = { yoffset = -0.035 }, -- breve
                        [0x002D9] = { yoffset = -0.02 }, -- dot
                        [0x000A8] = { yoffset = -0.02 }, -- ddot
                        [0x020DB] = { yoffset =  0.04 }, -- dddot
                        -- [0x002DA] = { yoffset = -0.05 }, -- ring
                        -- [0x002C7] = { yoffset = -0.05 }, -- check
                        [0x020D7] = { yoffset = -0.07 }, -- vec
                        -- [0x00300] = { yoffset = -0.07 , all=true }, -- widegrave
                        -- [0x00301] = { yoffset = -0.07 , all=true }, -- wideacute
                        -- [0x00302] = { yoffset = -0.02 , all=true }, -- widehat
                        -- [0x00303] = { yoffset = -0.02 , all=true }, -- widetilde
                        -- [0x00304] = { yoffset = -0.05 , all=true }, -- widebar
                        -- [0x00306] = { yoffset = -0.03 , all=true }, -- widebreve
                        -- [0x00307] = { yoffset = -0.03 , all=true }, -- widedot
                        -- [0x00308] = { yoffset = -0.03 , all=true }, -- wideddot
                        -- [0x020DB] = { yoffset =  0.0 , all=true }, -- widedddot
                        -- [0x0030A] = { yoffset = -0.05 , all=true }, -- widering
                    },
                },
                {
                    tweak   = "fixprimes",
                    scale   = 1,
                    -- smaller = true,
                    factor  = 1,
                },
                {
                    tweak = "checkspacing",
                },
                {
                    tweak = "addscripts",
                },
                {
                    tweak = "accentdimensions",
                },
                {
                    tweak = "addrules",
                },
            },
        },
        bigslots = {
            1, 3, 5, 7
        },
    },
}