Is there a simple and determinist way to make the difference
between the 2 sequences:
<XX></XX>
and
<XX/>
The EndElement callback does not provide this information.
Thanks,
Pascal.
13  2499  dp*****@yahoo.f r wrote: Is there a simple and determinist way to make the difference
between the 2 sequences:
<XX></XX>
and
<XX/>
No. Their meaning is exactly the same. Why do you think you need that?
The EndElement callback does not provide this information.
Rolf Magnus wrote: dp*****@yahoo.f r wrote:
Is there a simple and determinist way to make the difference
between the 2 sequences:
<XX></XX>
and
<XX/>
No. Their meaning is exactly the same. Why do you think you need that?
Doesn't the first sample have an empty text() node as first child, and
the second doesn't ?
Franck,e-
The EndElement callback does not provide this information.
In article <41************ ***********@new s.free.fr>,
Franck Guillaud <f_************ **@free.fr> wrote: <XX></XX>
<XX/>
Doesn't the first sample have an empty text() node as first child, and
the second doesn't ?
No.
(XML itself doesn't define any such thing as a "text node". The
Infoset has character information items, and there aren't any of them
in either case. The XPath data model doesn't have a text node in either
case, and SAX parsers do not call the characters method.)
-- Richard
Rolf Magnus wrote:
No. Their meaning is exactly the same. Why do you think you need that?
Ok, everywhere, I read that they are the same.
But this is only true for XML, not for HTML, and even it if was
true for HTML, it is still not true due to the way browsers interpret it.
What I need is to parse manually written HTML.
In HTML, <BR/> is interpreted differently than <BR></BR>.
So, I have to basic reasons to do this:
- I need it, the parser must make the difference, because
it must ouput tag that it does not process like they were entered
in order for the ouput to be correctly interpreted.
- Even if it was not needed due to a technical reason, if the
developper who wrote the HTML page decided that it is <XX/>, i
prefer to output <XX/> rather than the other form. So that the
developper can easily read the output of my program, and do not have
to wonder about some "strange" conversion.
Summary;
We do no live in a perfect world, with perfect standard perfectly
implemented by perfect developper. So we need a "stable" way to
do the difference. I like standards very much (I have a networking
background, you know ISO, IETF, IEEE, ATM FORUM, FR FORUIM, EIA, etc etc
....), but I live in a non standard world. I must adapt to survive :-)
Thanks for your help.
Pascal.
Ok, everywhere, I read that they are the same.
But this is only true for XML, not for HTML, and even it if was
true for HTML, it is still not true due to the way browsers interpret it.
well for HTML (but this is after all an XML newsgroup) the situation is
completely different.
<BR/> and <BR></BR>
are _both_ syntax errors ( /> is always a syntax error in HTML, and BR
has no end tag as it is declared EMPTY in the HTML DTD, so </BR> is also
an error)
Of course a browser may or may not have some lax silent error recovery
from either of these situtations but in any case the behaviour will be
browser specific. - Even if it was not needed due to a technical reason, if the
developper who wrote the HTML page decided that it is <XX/>, i
prefer to output <XX/> rather than the other form.
So long as you are clearly writing HTML rather than XML there's nothing
wrong with you doing that. XSLT for example, if writing html can not
distinguish the inputs of <BR/> and <BR></BR> as the input is XML and
these are the same, but in either case an "identity" transform will
produce the HTML syntax
<BR>
if the html output method is being used (which it is by default if the
top level output element is <html>.
David
Pascal Dufour wrote: Rolf Magnus wrote:
>
> No. Their meaning is exactly the same. Why do you think you need that?
>
Ok, everywhere, I read that they are the same.
But this is only true for XML, not for HTML, and even it if was
true for HTML, it is still not true due to the way browsers interpret it.
What I need is to parse manually written HTML.
In HTML, <BR/> is interpreted differently than <BR></BR>.
you can't parse html with an xml parser ; however, you can parse html
with an sgml parser ; additionally, you can use a tool that converts
html in xml (with best effort), like Cyber Neko HTML Parser
http://www.apache.org/%7Eandyc/neko/doc/html/
So, I have to basic reasons to do this:
- I need it, the parser must make the difference, because
it must ouput tag that it does not process like they were entered
in order for the ouput to be correctly interpreted.
there's something quite confusing : you're talking about parsing like
outputing ; these 2 processes are totally opposite : parsing gives
access to a data model, and serializing (i prefer this term) renders
this data model to an xml characters form (file, char flow...)
you can't act on the xml data model because it is governed by a set of
stable specifications, but you can act on the serialization ; for this
purpose, formatter tools often provide a set of options that allow to
tune the output ; you can also write your own formatter
- Even if it was not needed due to a technical reason, if the
developper who wrote the HTML page decided that it is <XX/>, i
prefer to output <XX/> rather than the other form. So that the
developper can easily read the output of my program, and do not have
to wonder about some "strange" conversion.
Summary;
We do no live in a perfect world, with perfect standard perfectly
implemented by perfect developper. So we need a "stable" way to
do the difference. I like standards very much (I have a networking
background, you know ISO, IETF, IEEE, ATM FORUM, FR FORUIM, EIA, etc etc
...), but I live in a non standard world. I must adapt to survive :-)
Thanks for your help.
Pascal.
--
Cordialement,
///
(. .)
-----ooO--(_)--Ooo-----
| Philippe Poulard |
-----------------------
David Carlisle <da****@nag.co. uk> writes: XSLT for example, if writing html can not
distinguish the inputs of <BR/> and <BR></BR> as the input is XML and
these are the same,
Actually, in XML, the notion "element" is not an abstract one,
but a concrete non-terminal symbol of the syntax.
Therefore, as elements, the element "<br/>" and the element
"<br></br>" are two /different/ elements, just as "<br/>" also
is a different element than "<br />".
You might say, that they have the same element type, the same
contents and the same number, names and value of attributes
(here: none). Or, possibly, that they have the same
"infoset", but the infoset specification is not part of the
XML specification.
In article <yg************ *@penguin.nag.c o.uk>,
David Carlisle <da****@nag.co. uk> wrote:
% are _both_ syntax errors ( /> is always a syntax error in HTML, and BR
Actually, it's not, although its meaning is not the same as in XML. <br />
means the same as <br>>.
--
Patrick TJ McPhee
East York Canada pt**@interlog.c om Actually, it's not, although its meaning is not the same as in XML. <br />
means the same as <br>>.
Ooops sorry I was thinking that was turned off in HTML's SGML decl, but
apparently not. Still (most:-) of my point holds, in fact that means
that the situation is worse than I indicated: if you rely on <br/>
working in the browser after sending the file with an html mime type you
are not just relying on lax error recovery, you are relying on
non-conformant HTML parsing.
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