Re: FYI: Regex paper for UTC

On 22 Oct 2007, at 22:16, Philippe Verdy wrote:

> Note that L may contain strings containing strings like a base  
> letter followed by a diacritic, which is canonically equivalent to  
> its precomposed form. Would only the precomposed form would be  
> allowed in [L] ? The definition of "length" is not precise enough.  
> Forme the composed nas precomposed letters should behave  
> identically, ans so their "length" should be 1 in both case. If so,  
> then [L] will contain BOTH the precomposed letter and the sequence  
> of a letter and a diacritic.

Read all the stuff. There are different constructions.

The main point is that the operations you seek are restrictions of  
the language set operations.

   Hans Åberg