RE: [EXI] CH Event processing

Hi Santhanakrishnan,
 
Yes, you are right. This is an intentional optimization to increase
processing efficiency and simplify implementation. Pruning the unused CH
events that have length 2 would reduce processing efficiency and complicate
implementations for only a small improvement in compactness (one bit for
some elements). 
 
    All the best,
 
    John


  _____  

From: public-exi-request@w3.org [mailto:public-exi-request@w3.org] On Behalf
Of santhanakrishnan
Sent: Wednesday, May 07, 2008 2:10 AM
To: public-exi@w3.org
Subject: [EXI] CH Event processing



Hi

       During encoding when we encounter a CH EVENT and if the current
grammar does not have a production with event code of length 1 matching CH
event we add a new production for CH with event code 0. This is quite
useful.

       But why should not the existing CH production be removed from the
grammar. I feel it is simply a place holder and in some cases can lead to
extra bit for encoding than necessary(when there are 2**n productions).

       So I suggest to remove the existing CH production when we are adding
a new CH production with event code length of 0. 

 

Regards

Santhanakrishnan