://www.w3.org/TR/CSS21/visudet.html#propdef-width" />
        <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#the-width-property" />
        <link rel="match" href="../reference/ref-filled-black-96px-square.xht" />

        <meta name="assert" content="The 'width' property applies to elements with 'display' set to 'block'." />
        <style type="text/css">
            span
            {
                background: black;
                display: block;
                height: 1in;
         