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From: Saašha Metsärantala

> One issue still remaining when it comes to the BNF is to try to avoid

> years such as "-0000". 

 

 

Ok I have changed:

________________________________________________________

date = positiveDate | negativeDate

positiveDate = year | yearMonth | yearMonthDay 

negativeDate = "-" positiveDate

 

year = digit digit digit digit

 

___________________________________________________

 

to

 

_______________________________________________

date =  year | yearMonth | yearMonthDay

 

year = positiveYear | negativeYear | "0000"

 

positiveYear = 

       positiveDigit digit digit digit 

     | digit positiveDigit digit digit

     | digit digit positiveDigit digit

     | digit digit digit positiveDigit

 

negativeYear = "-" positiveYear

____________________________________________________

 

 

Note that "negative" had previously applied to a date, not specific to the year definition. Now it applies specifically and only to the year.  So this means that not only would "-0000" be excluded, but also a date like  -00001230 would be excluded.  I think this is not a problem though, such a date is not meaningful.  

 

Right?

 

--Ray