Something

      <article>
        <singular>
          <definite>
            <male>el</male>
            <female>la</female>
          </definite>
          <indefinite>
            <male>un</male>
            <female>una</female>
          </indefinite>
        </singular>
        <plural>
          <definite>
            <male>los</male>
            <female>las</female>
          </definite>
          <indefinite>
            <male>unos</male>
            <female>unas</female>
          </indefinite>
        </plural>
      </article>