Extracting data from an XHTML file with XQuery

Post by **sampablokuper** » Thu Sep 18, 2008 2:41 pm

Hi all,

I have an XHTML document as follows:

<!DOCTYPE html SYSTEM "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

    <head>

        <title>Foo</title>

    </head>

    <body>Bar</body>

</html>

which I call index.html .

I also have the following XQuery files:

Code: Select all

for $markup in /*

return $markup

which I call test_one.xquery, and:

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for $markup in /html/*

return $markup

which I call test_two.xquery .

When I use the XQuery debugging view in Oxygen, and select index.html as my XML file, test_one.xquery as my XQuery file and Saxon-B as my XQuery engine in the Control Toolbar, running the XQuery gives the following output:

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<?xml version="1.0" encoding="UTF-8"?>

<html xmlns="http://www.w3.org/1999/xhtml">

   <head>

      <title>Foo</title>

   </head>

   <body>Bar</body>

</html>

But when I do the same thing with test_two.xquery selected instead, I get the following output:

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<?xml version="1.0" encoding="UTF-8"?>

Why is it that test_two.xquery gives no output (aside from the XML header line)?

Thanks in advance for your help!

Sam

Post by **sorin_ristache** » Thu Sep 18, 2008 3:02 pm

Hello,

You get an empty result with test_two.xquery because you did not specify the correct namespace for the html element. You should use a namespace declaration:

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declare namespace xhtml="http://www.w3.org/1999/xhtml";



for $markup in /xhtml:html/*

return $markup

In test_one.xquery the * matches elements from any namespace.

Regards,
Sorin

Post by **sampablokuper** » Thu Sep 18, 2008 3:39 pm

Hi Sorin,

Thanks for your help! That's fixed it for me

Sam

Extracting data from an XHTML file with XQuery

Extracting data from an XHTML file with XQuery

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Re: Extracting data from an XHTML file with XQuery