rg">RELAX NG (RNG)</a></strong> - a pattern-based,
                    user-friendly XML schema language. RNG schemas may also use types to constrain XML character data.
                    RNG is maintained by the <a href="http://www.oasis-open.org">Organization for the Advancement of
                    Structured Information Standards (OASIS)</a> and is both an OASIS and an
                    <a href="http://www.iso.org">ISO (International Organization for Standardization)</a> standard.</li>
           