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   Re: [xml-dev] version numbers and infosets

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From: "John Cowan" <jcowan@reutershealth.com>

> People use mainframes, and XML too.  If XML 1.0 had insisted
> that only CR-LF and LF were acceptable line terminators, don't you
> think an argument based on justice for Mac users would have been
> appropriate?

No, supporting Mac-style line terminators does not need to grandized into
an issue of justice (by which John means egalitiarianism, I think*) but

 * pragmatism: the number of people typing documents in editors
  on Macs is very large

 * operational considerations: a programmer generally has control over the
  line terminators they use, and mainframes are typically programmed

 * XML 1.0 was starting fresh, and therefore only had SGML and RFC
  compatability to cope with: XML 1.n must be a trade-off between the
  particular benefits and the costs in distruption. 

 * CR and LF were in play any way, so a decision on how to support CR
  alone is necessary even as a matter of error handling

 * CR is part of ASCII, and so it is low-hanging fruit to adopt. 

 * XML had the 80/20 rule, and I am not sure that NEL would
  have made it even if it into XML 1.0 in any case.

NEL on the other hand is rare, specialist, non-ASCII, and not low-hanging fruit.

> "It is intolerable to have no better reason for a legal rule than
> that *thus* it was laid down in the time of King Henry the Second."

For some reasons, see above. 

Rick Jelliffe

* IMHO It is not injust if W3C were to decide on only ASCII characters in names,
for example.  But would be anti-egalitarian, and obviously bad for the market.


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