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Re: linking, 80/20

• To: Amelia A Lewis <amyzing@t...>
• Subject: Re: linking, 80/20
• From: Erik Wilde <net.dret@d...>
• Date: Tue, 20 Aug 2002 01:20:49 +0200
• Cc: Tim Bray <tbray@t...>, "Simon St.Laurent" <simonstl@s...>, xml-dev@l...
• References: <r01050300-1015-31DC9E97B39911D69F470003937A08C2@[192.168.124.21]> <3D612F4B.9010703@d...> <1029785860.25933.71.camel@marajen> <3D61540E.4030504@t...> <1029791998.25933.89.camel@marajen>
• User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.1b) Gecko/20020721

Amelia A Lewis wrote:
> Create a TypeHandler in SAX.  This turns out to be a problem.  Clearly,
> you want to be able to signal a type (an identifier for the type) and a
> value; this means that there is significant overlap with the "regular"
> handlers.  Double-reportage, in short, and the usual problems of
> synchronization.  The problem becomes acute if there is a desire to
> create a mostly-PSVI, falling back to plain-old-content if the content
> is well-formed, but not valid (this happens a lot more often than the
> folks who write the specs seem to think).  Issues arise of: does the
> type information arrive first or last?  How do multiple extensions
> interact?  What order are the information items delivered in, when
> multiple extensions (or the core and one or more extensions) overlap? 
> This is a problem for SAX and similar streaming/message-oriented  APIs,
> but such APIs tend to be best-suited for the parse.

i don't know sax too well, but shouldn't there already exist such a case 
for 'attributes' and 'namespace attributes' of an element, so that when 
an attribute declaring a namespace is being parsed, two events could be 
raised? how does handle sax this?

and yes, introducing infoset extensibility certainly would make any api 
more complex, even though i think that the issues that were being raised 
could be solved. and: if you didn't need or want access to the infoset 
extensions, than you could still use a good old sax1/2 parser.

cheers,

erik wilde  -  tel:+41-1-6325132  -  fax:+41-1-6321035
           mailto:net.dret@d... -  http://dret.net/
           computer engineering and networks laboratory
           swiss federal institute of technology  (eth)
           * try not. do, or do not. there is no try. *

• Follow-Ups:
  • Re: linking, 80/20
    • From: Amelia A Lewis <amyzing@t...>
  • Re: linking, 80/20
    • From: "Simon St.Laurent" <simonstl@s...>

• References:
  • Re: linking, 80/20
    • From: "Simon St.Laurent" <simonstl@s...>
  • Re: linking, 80/20
    • From: Erik Wilde <net.dret@d...>
  • Re: linking, 80/20
    • From: Amelia A Lewis <amyzing@t...>
  • Re: linking, 80/20
    • From: Tim Bray <tbray@t...>
  • Re: linking, 80/20
    • From: Amelia A Lewis <amyzing@t...>

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