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   RE: [xml-dev] Underwhelmed (WAS: [xml-dev] XOM micro tutorial)

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At 9:40 AM -0700 9/21/02, Dare Obasanjo wrote:
>We shipped this functionality in the .NET framework and I use it all 
>the time. Search for the string "InnerXml" in the text at 

Thanks. Does this code work? If so, it's worse than I thought it was. 
I had assumed InnerXML worked with well-formed XML. It apparently 
doesn't. For example,

channel.InnerXml  = channel.InnerXml + "\n<item>\n<title>" + diaryTitle +
      "</title>\n<link>" + diaryLink + "</link>\n<description>" + 
diaryDesc + "</description>\n";

Where's the end-tag for the item element? There's another case of 
this a little further on:

channel.InnerXml  = channel.InnerXml + "\n" +
       "<rss:item xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"; " +
       "xmlns:rss=\"http://purl.org/rss/1.0/\"; rdf:about=\"" + 
diaryLink + "\" >\n" +
       "<rss:title>" + diaryTitle + "</rss:title>\n<rss:link>" + 
diaryLink + "</rss:link>\n" +
       "<rss:description>" + diaryDesc + "</rss:description>\n";

This time it's the rss:item end-tag that's gone missing, unless I've 
misunderstood C# handles double quote escaping in strings.

The underlying problem seems to be that this approach mixes up the 
view of XML as a tree of nodes and XML as a sequence of text. Either 
view makes sense. Both views are useful for processing (though only 
the text is normative). But using them both at the same time is 
ultimately confusing.

| Elliotte Rusty Harold | elharo@metalab.unc.edu | Writer/Programmer |
|          XML in a  Nutshell, 2nd Edition (O'Reilly, 2002)          |
|              http://www.cafeconleche.org/books/xian2/              |
|  http://www.amazon.com/exec/obidos/ISBN%3D0596002920/cafeaulaitA/  |
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