return {
    name = "mdbch-math",
    version = "1.00",
    comment = "Math fonts that complement ITC Charter.",
    author = "Hans, Mojca, Aditya",
    copyright = "ConTeXt development team",
    mathematics = {
        mapfiles = {
            "mdbch.map",
            "mkiv-base.map",
        },
        virtuals = {
            ["mdbch-rm"] = {
                { name = "file:bchr8a", features = "virtualmath", main = true },
                { name = "mdbchr7m",  vector = "tex-mr", skewchar=0x7F },
                { name = "mdbchri7m", vector = "tex-mi", skewchar=0x7F },
                { name = "mdbchri7m", vector = "tex-it", skewchar=0x7F },
                { name = "mdbchb7m",  vector = "tex-bf", skewchar=0x7F },
                { name = "mdbchbi7m", vector = "tex-bi", skewchar=0x7F },
                { name = "mdbchr7y",  vector = "tex-sy", skewchar=0x30, parameters = true },
                { name = "mdbchr7v",  vector = "tex-ex", extension = true },
                { name = "mdbchrma",  vector = "tex-ma" },
                { name = "mdbchrmb",  vector = "tex-mb" },
            },
            ["mdbch-bf"] = {
                { name = "file:bchb8a", features = "virtualmath", main = true },
                { name = "mdbchb7m",  vector = "tex-mr", skewchar=0x7F },
                { name = "mdbchbi7m", vector = "tex-mi", skewchar=0x7F },
                { name = "mdbchbi7m", vector = "tex-it", skewchar=0x7F },
                { name = "mdbchb7y",  vector = "tex-sy", skewchar=0x30, parameters = true },
                { name = "mdbchb7v",  vector = "tex-ex", extension = true },
                { name = "mdbchbma",  vector = "tex-ma" },
                { name = "mdbchbmb",  vector = "tex-mb" },
            }
        }
    }
}