Question about font weights

fontWeight is defined as

<define name="fontWeight">
    <choice>
        <value>normal</value>
        <value>bold</value>
        <value>100</value>
        <value>200</value>
        <value>300</value>
        <value>400</value>
        <value>500</value>
        <value>600</value>
        <value>700</value>
        <value>800</value>
        <value>900</value>
    </choice>
</define>

However the weights known in Qt are

    enum Weight {
        Light    = 25,
        Normal   = 50,
        DemiBold = 63,
        Bold     = 75,
        Black    = 87
    };

(and usually only 50 and 75 are used)

Is this really on the same scale?

-- 
David Faure, , sponsored by Trolltech to work on KDE,
Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org).