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   Re: ModSAX: Proposed Core Features (heretical?)

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  • From: "Bill la Forge" <b.laforge@jxml.com>
  • To: <roddey@us.ibm.com>, <xml-dev@ic.ac.uk>
  • Date: Tue, 16 Mar 1999 19:08:12 -0500

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

>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.


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