<content> <rng:choice> <rng:data type="string"> <rng:param name="pattern">(underline|overline|line-through|strike)\(\d+\)</rng:param> </rng:data> <rng:data type="string"> <rng:param name="pattern">(letter-spacing|line-height)\((\+|-)?\d+(\.\d+)?%?\)</rng:param> </rng:data> </rng:choice> </content>