compatible" id="ascii-compatible_xref1">ASCII-compatible character encoding</a>,
    and, in addition, if that encoding isn't US-ASCII itself, then
    the encoding
    <a href="terminology.html#must-requirement" id="must-requirement_xref19">must</a>
    be specified using a
    <code><a href="meta.html#meta">meta</a></code> element with a
    <a href="meta.charset.html#meta.charset.attrs.charset">charset</a>
    attribute or a <code><a href="meta.html#meta">meta</a></code> element
    in the
    <a href="m