xml-dev - Re: ModSAX: Proposed Core Features (heretical?)

["Bill la Forge" <b.laforge@jxml.com>]

From: roddey@us.ibm.com <roddey@us.ibm.com>
>That would have some pretty large performance implications. For our new
>generation parsers, we can validate the event stream *very* fast as its
>going out of the parser. Doing it after the fact, way up stream, would be
>much, much slower. I could imagine that this would be true of other parsers
>as well, that once the stuff has gone out into the 'real world', validation
>becomes much more work becuase now it has to be in terms of text
>comparisons instead of internal element ids.


It would be nice to have a lower-level interface where such things could
be done efficently. This is one of the reasons why I sometimes speak of
parser-kernel, as an oblique reference to Simon's layered architecture
proposal.

>I understand that the filter sequence could change the document, but
>wouldn't it be just as important to know that it died because the original
>document was hosed (and therefore the filters spat out junk)?


Too true.

Bill


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