Re: Issue 57

[James Clark <jjc@jclark.com>]

>> - <value> and <data> are not "nullable", ie they don't match the empty
>>   sequence
>
> This is a welcome news, because otherwise it is very hard to correctly
> compute nullability in an efficient way (because a datatype can accept ""
> or reject it depending on the context.)

Yes. At the moment, I am cheating by assuming that any context-dependent 
datatype cannot match the empty string.

>
> But I am still unable to confirm that the mentioned spec change will
> affect the implementation exactly in the described way.

If you can indicate where you are unsure, maybe I can explain some more.

James