CZ-0001

[MURATA Makoto (FAMILY Given)]

> (Wearing my RNG geek hat)
> 
> Czech proposed to replace 
> 
> sml_CT_CalcCell =
>   attribute r { sml_ST_CellRef }?,
>   attribute ref { sml_ST_CellRef }?,
> 
> by 
> 
> sml_CT_CalcCell = 
> (attribute r { sml_ST_CellRef } | 
> attribute ref { sml_ST_CellRef }), 
> 
> since either @r or @ref is required but not both.

I now think that 

attribute ( r | ref ) { sml_ST_CellRef } 

is  better than 

(attribute r { sml_ST_CellRef } | 
  attribute ref { sml_ST_CellRef })

because it captures the intention more precisely.  Jirka, do you agree?

Cheers,
Makoto