Anyone who uses <marcGenre> or <isbn> as opposed to their untyped counterparts is voluntarily requesting strict type checking. S/he *wants* to be inflexible. It was just a brainstorm following Karen's idea for multiple title elements. What would be perfect would be to have authority/type attributes that actually meant something to a schema processor. Or something similar. >>> [log in to unmask] 2004-01-22 14:45:39 >>> On Jan 22, 2004, at 1:57 PM, Andrew E Switala wrote: You mean data-typing? I don't think the benefits of data-typing outweigh the inflexibility introduced by hard-coding such marc-specific stuff in MODS. Bruce