Re: XML Quiz

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From: David Carlisle <d.p.carlisle@g...>
To: Roger L Costello <costello@m...>
Date: Tue, 3 May 2022 15:29:46 +0100

On Tue, 3 May 2022 at 13:28, Roger L Costello <costello@m...> wrote:

After XML parsing is complete, every occurrence of & will have been replaced by &

True
False

Scroll down to see the answer ……………

False! If the & is within a CDATA section or within a comment, then it will be unchanged. Otherwise, it will be changed.

Lesson Learned: An XML lexer/parser must perform conditional processing:

IF (& is within a CDATA section or comment) THEN

OUTPUT(“&”)

ELSE

OUTPUT(“&”)

That's a strange way to describe the condition (and I doubt it corresponds to real code)

It's not that you scoop up `&` then decide what to do with it, rather it is

if & is within a CDATA section or comment or PI ....

else

start scanning for an entity or character reference

Your description would need separate tests for & and &rightarrow; and é ....

David

References:
- XML Quiz
  - From: Roger L Costello <costello@m...>

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