Here is the problematic example (from the attached
ws-between-blocks-test-fails.html):
...
<body>
<div>
<p>Para 1</p>
<p>Para 2</p>
<p>Para 3</p>
</div>
</body>
...
At least with the default XHTML CSS, between each p element a text
node will be displayed that contains a space (visually a space). But
of course the page should look the same as without that div (the
attached ws-between-blocks-test-ok.html), or as with the div but
without the whitespaces between the the p-s:
...
<body>
<div>
<p>Para 1</p><p>Para 2</p><p>Para 3</p>
</div>
</body>
...
If I create and modify the XML document exclusively with XXE, this
problem doesn't arise, as when I put that tree of p-s into a div, XXE
converts it to this lastly shown form (i.e. not linebreak between
p-s). But if the XML was not created exclusively with XXE... And it's
indeed an important point of XML, that you can use various tools to
deal with it.
I guess that this in principle is a CSS implementation problem, i.e.
whitespace between *CSS* blocks shouldn't have visual effect. However,
maybe for this thing to work correctly in XXE, it's rather that XXE
should know if whitespace between which *elements* are irrelevant
according the XML schema defined meaning of the elements. So the
white-spaces just wouldn't reach the CSS implementation, they would be
deleted right when XXE loads the XML.
So, what's about this kind of issue? It's really a problem with
schemas that allow "mixed content" inside certain block elements.
XHTML is a prime example of a such schema, because putting parts of a
document inside div-s that has an id (or class) is a quite common
practice. And unless you have added the div with XXE, you get a quite
messy view if you open it with XXE.
--
Best regards,
Daniel Dekany
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