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Normal Topic anybody into XML? (Read 3533 times)
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anybody into XML?
Apr 7th, 2002 at 9:19pm
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I've got a question about those stupid Element Type Declarations. Let's say I've got an element looking like

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<someelement>
  <html><bod>this is a test φδόΔάΦ</body></html>
</someelement>


Now I want that this element to have the value '<html><bod>this is a test φδόΔάΦ</body></html>' and not any subnotes. Using
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<!ELEMENT someelement (#PCDATA)>
doesn't work because he interprets those <>. But I don't want him to do so. Also replacing those chars by &lt; and &rt; is not an option! I want him so assign the whole string to this element, with all its special chars and stuff. Is there any Element Content Type which would do the job?
  
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Re: anybody into XML?
Reply #1 - Apr 7th, 2002 at 9:32pm
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Use type CDATA if you're not going to have any subelements.
PCDATA = Parsed Character Data, parsed by the parser.
CDATA = Character Data, NOT parsed by the parser.

Might want to use a schema, because in that you have to specify which elements are complex (contain other elements).
  
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Re: anybody into XML?
Reply #2 - Apr 7th, 2002 at 9:42pm
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How would I have to use this CDATA typ? I already tried
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<!ELEMENT someelement (#CDATA)>

as a schema but it gave me an error Undecided
  
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Re: anybody into XML?
Reply #3 - Apr 7th, 2002 at 10:42pm
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Ah forget it, just leave it as PCDATA and define a CDATA section in the content, like so:

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<![CDATA[
blah blah
]]>
  
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Re: anybody into XML?
Reply #4 - Apr 7th, 2002 at 10:55pm
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oh ok so it's a DTD where we're talking about Roll Eyes

Here is the DTD
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<!ELEMENT main (first, second)>
<!ELEMENT first (#PCDATA)>
<!ELEMENT second CDATA>


And here the .xml file
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<?xml version="1.0"?>
<!DOCTYPE main SYSTEM "test.dtd">
<main>
  <first>Something in here</first>
  <second>
    <html>Just another line</html>lalala
  </second>
</main>


Now I try that in the Delphi 6 XML-Mapper and it gives me an error about an invalid DTD. Some thing when I use (#CDATA) instead.
  
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Re: anybody into XML?
Reply #5 - Apr 7th, 2002 at 10:59pm
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Quote:
ah forget it, just leave it as PCDATA and define a CDATA section in the content
hm ok I'll try that. Just wondering if there isn't a better way to do that e.g. by a special element typ since always adding this stuff in front looks pretty stupid...
  
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Re: anybody into XML?
Reply #6 - Apr 7th, 2002 at 11:52pm
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I thought it should work with CDATA in the DTD, but... * Michael shrugs

Quote:
oh ok so it's a DTD where we're talking about Roll Eyes

That stuff you're using is from a DTD and then you said you used it in a schema. There IS a big difference, because that stuff doesn't work in a schema!

If you want to do it a better way, use a schema instead of a DTD, because unless you specify <xs:complexType> within an element, it is considered to be a simple element by default, I believe. See here.
  
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Re: anybody into XML?
Reply #7 - Apr 8th, 2002 at 4:22pm
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Hm didn't know about this XSD stuff. Anyway I tried that and even the CDATA thing but both didn't work either. Undecided

I thought XML would have been designed to be used as an universal dataformat but right now it looks to me like it is absolutly unusable for custom nontext data Sad
  
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Re: anybody into XML?
Reply #8 - Apr 8th, 2002 at 9:48pm
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Well, the standard itself is great, it's just (as with most things, such as HTML) the implementation (or lack thereof) that causes development nightmares. Is there any documentation for Delphi's XML parser? You might try looking through that for information on limitations. Either that or start searching for an alternative parser. Undecided
  
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