[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

RE: Postel's law, exceptions

• To: "'Greg Colyer'" <greg-xml@e...>, <xml-dev@l...>
• Subject: RE: Postel's law, exceptions
• From: "Bob Wyman" <bob@w...>
• Date: Mon, 19 Jan 2004 09:39:16 -0500
• Importance: Normal
• In-reply-to: <400BCC27.4080705@e...>
• Reply-to: <bob@w...>

Greg Colyer wrote:
> if there's at least one closing tag at the end
>  <trade>
>   <ticker>IBM</ticker>
>   <amount>100</amount>
>then we don't have the main problem, even though w-f 
> is still violated.
	You may not have problems with the <amount> element, however,
you still don't know if corruption has prevented transfer of data that
might have followed the <amount> tag and might be significant for the
consuming application. For instance, let us say that the schema for
the <trade> element says that it may have a child <exchange> which
defaults to "NYSE". If there is no closing </trade> tag, you don't
know if the value for <exchange> should be <NYSE> or some other value.
Thus, there is still significant ambiguity here...

		bob wyman

• Follow-Ups:
  • Re: Postel's law, exceptions
    • From: Greg Colyer <greg-xml@e...>

• References:
  • Re: Postel's law, exceptions
    • From: Greg Colyer <greg-xml@e...>

• Prev by Date: RE: [Announce] New book on XML in Microsoft Office 2003
• Next by Date: Re: RDDL(2): new version up
• Previous by thread: RE: [Announce] New book on XML in Microsoft Office 2003
• Next by thread: Re: Postel's law, exceptions
• Index(es):
  • Date
  • Thread