Re: Quiz: is this XML well-formed?

From: "G. Ken Holman" <gkholman@CraneSoftwrights.com>
To: Roger L Costello <costello@mitre.org>,"xml-dev@l..." <xml-dev@l...>
Date: Thu, 04 Feb 2021 13:23:40 -0500

Play the video

But, but, but, ... Why is space required between attributes? Surely a parser can recognize the start of the next attribute given the end-delimiter of the previous attribute's value, yes?

Because when XML was pulled together in the mid-1990's it was made to be an application of SGML from the early-1980's (retroactively modified a bit to accommodate some of the decisions made in XML).

Such a decision would have made an instance of XML not an instance of SGML.

And just because something is unambiguous doesn't make it meaningful to implement.

I hope this helps.

. . . . . . Ken

At 2021-02-04 18:18 +0000, Roger L Costello wrote:

Hi Folks,

Is the following XML well-formed?

<altitude units="meters"reference="AGL">1000</altitude>

Scroll down to see the answer ...

No! It is not well-formed. There must be a space before reference="AGL" like so:

<altitude units="meters" reference="AGL">1000</altitude>

But, but, but, ... Why is space required between attributes? Surely a parser can recognize the start of the next attribute given the end-delimiter of the previous attribute's value, yes?

/Roger

_____________


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