2

I'm parsing a document.xml file using Nokogiri, extracted from .docx file and need to get values of attributes with names, like "w:val".

This is a sample of the source XML:

<w:document>
  <w:body>
    <w:p w:rsidR="004D5F21" w:rsidRPr="00820E0B" w:rsidRDefault="00301D39" pcut:cut="true">
      <w:pPr>
        <w:jc w:val="center"/>
      </w:pPr>
  </w:body>
</w:document>

This is a sample of the code:

require 'nokogiri' 

doc = Nokogiri::XML(File.open(path))
  doc.search('//w:jc').each do |n|
    puts n['//w:val']
  end

There is nothing in the console, only empty lines. How can I get the values of the attributes?

Hroft
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3 Answers3

3
require 'nokogiri' 

doc = Nokogiri::XML(File.open(path))
  doc.xpath('//jc').each do |n|
    puts n.attr('val')
  end

Should work. Don't forget to look at the docs : http://nokogiri.org/tutorials/searching_a_xml_html_document.html#fn:1

Kassym Dorsel
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3

The document is missing its namespace declaration, and Nokogiri isn't happy with it. If you check the errors method for your doc, you'll see something like:

puts doc.errors
Namespace prefix w on document is not defined
Namespace prefix w on body is not defined
Namespace prefix w for rsidR on p is not defined
Namespace prefix w for rsidRPr on p is not defined
Namespace prefix w for rsidRDefault on p is not defined
Namespace prefix pcut for cut on p is not defined
Namespace prefix w on p is not defined
Namespace prefix w on pPr is not defined
Namespace prefix w for val on jc is not defined
Namespace prefix w on jc is not defined
Opening and ending tag mismatch: p line 3 and body
Opening and ending tag mismatch: body line 2 and document
Premature end of data in tag document line 1

By using Nokogiri's CSS accessors, rather than XPath, you can step around namespace issues:

puts doc.at('jc')['val']

will output:

center

If you need to iterate over multiple jc nodes, use search or one of its aliases or act-alike methods, similar to what you did before.

the Tin Man
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  • "The document is missing its namespace declaration". I new in Nokogiri, can you tell me, why? – avy Dec 17 '11 at 20:17
  • I don't know why the XML namespace is missing. Perhaps the example XML isn't complete or wasn't correctly copied. Maybe the XML is malformed when it is generated. – the Tin Man Dec 17 '11 at 22:24
0

Show there:

require 'nokogiri' 

doc = Nokogiri::XML(File.open(path))
  doc.search('jc').each do |n|
  puts n['val']
end

Also, yes, read this: http://nokogiri.org/tutorials/searching_a_xml_html_document.html#fn:1

avy
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