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CDATA conversion issue

  • From: Lynda VanVleet <lyndavv@e...>
  • To: xml-dev@l...
  • Date: Wed, 15 Aug 2001 15:10:46 -0700

cdata conversion
We need to allow people to view/edit XML messages in our application.  When we import a document that has a CDATA section into  an XML Parser the values are converted using the escape characters and created in the DOM as a text node. (We have tried this with 2 parsers, Sun Forte 4GL and Oracle's Java Parser) Thus, if the document is exported from the DOM, the CDATA section is gone, and the data now contains the escape characters.
 
Example Starting Doc
<aDoc><![CDATA[<aTag>Hello</aTag>]]></aDoc>
 
Example Ending Doc
<aDoc>&lt;aTag&gt;Hello&lt;/aTag&gt;</aDoc>
 
I am sure this is the intended DOM behavior, but it clearly does not satisfy our needs. 
 
Note:  If we add a CDATA section programmatically using the DOM, the export is correct.  This leads us to our only proposed solution so far which is to write our own code that parses the document and creates a DOM representation of the data not converting the CDATA sections.  Hopefully this is not the only solution!
 
Here is the code we are using (This is using the Sun Forte 4GL but you should be able to read this for the logic.):
//Open a Test File
aFile:File=New;
aFile.SetLocalName('c:\\temp\\ainfile.xml');
aFile.open(sp_am_read);
 
//Import the document
aDocument:Document=New;
aDocument.ImportDocument(aFile);
 
//Create an output file
aOutFile:File=New;
aOutFile.SetLocalName('c:\\temp\\aoutfile.xml');
aOutFile.open(sp_am_write);
 
//Export the docuemnt
aDocument.ExportDocument(aoutFile);
 
//Close the files.
aFile.close();
aOutFile.close(); 
 
I remembered this sort of question occuring on the list in June and looked in the archives but the solution was encoding base64 and that won't work for me.  What really scares me is in the archive thread Tim Bray says I'm always happy to avoid using CDATA sections if I can."
 
Lynda VanVleet

Lynda Van Vleet
Software Design Engineer
lvanvleet@c...
http://www.classiq.com/

 
 

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