[tei-council] unknown item in the agenda

[Lou Burnard]

Arianna Ciula wrote:
> LB      Expand explanatory prose in USE concerning which elements are 
> mandatory and how a user can know this.
>
> I think I remember what this is about now. I think at the previous 
> conference call Laurent pointed out that where in this chapter you say:
>
> "If however the element deleted by some modification is mandatory 
> within the content model of some other (undeleted) element, the result 
> is an unclean modification because some documents that would be 
> regarded as valid by the new schema would be regarded as invalid 
> according to the original schema. If an element is defined as having 
> some other specific element as a mandatory child, removing that child 
> would break the TEI abstract model (24.3.3 Conformance to the TEI 
> Abstract Model), though the parent of a mandatory child can of course 
> be removed safely if it is itself optional."
>
> there is no way for a user to know which elements are mandatory in the 
> prose of the chapters, so I think Lou had agreed to change the 
> sentence above a little bit. This is what I recollect.
>
> Arianna

I have now, finally, amplified this passage a bit. I hope I've made it a 
bit clearer.