Hi Yoshito, I know at least two implementations that support pointing ref to the id of a <segment>. Stating that it is equivalent to pointing to the id of a <mrk> element that encloses all <source> content might be the best option. I'm not happy either with allowing <pc> as a holder of annotated text. I just mentioned it because it is a valid container for text spans. In any case, we need to fix all ref attributes providing better examples. Regards, Rodolfo -- Rodolfo M. Raya Maxprograms
http://www.maxprograms.com