Absolute Xpath to get list of childnodes?

Question

AT 380509 T 20071215

For the above xml file, i need the xpath to receive the childnodes below it:

Output i need is :

<exchange-documents xmlns="http://www.epo.org/exchange">
    <exchange-document country="AT" doc-number="380509" family-id="38826527" kind="T" system="ops.epo.org">
      <bibliographic-data>
        <publication-reference data-format="docdb">
          <document-id>
            <country>AT</country>
            <doc-number>380509</doc-number>
            <kind>T</kind>
            <date>20071215</date>
          </document-id>
        </publication-reference>  
        <parties>
          <applicants>
          </applicants>
          <inventors>
          </inventors>
        </parties>
      </bibliographic-data>
    </exchange-document>

I using Linq-Xml to get the following data:

This is my Xpath and code:

var list = doc1.XPathSelectElement("exchange-document");

I couldnt retreive the needed output.It returns null for the above code. Can anyone pls help on this by providing the correct xpath to retieve the child nodes. Else is there any other way to retrieve it.

How about "/worldpatentdata/exchange-documents/exchange-document?" — vtd-xml-author, May 05 '10 at 07:44

score 1 · Answer 1 · answered May 05 '10 at 07:46

1

Your XML document uses XML namespaces, so you need to specify them in your XPath expression. See the following for how to do this:

answered May 05 '10 at 07:46

Chris Schmich

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score 1 · Accepted Answer · edited May 23 '17 at 12:19

the problem is well explained here : Search XDocument using LINQ without knowing the namespace

Your xml has namespaces. When you search for an element the Name attribute is an XNamae which include the namespace. So you have to look for Name.LocalName == [theNameOfYourNode]

var xml = XElement.Parse(@"<worldpatentdata xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema"">
          <meta name=""elapsed-time"" value=""329"" xmlns=""http://ops.epo.org/\""/>
          <exchange-documents xmlns=""http://www.epo.org/exchange\"">
            <exchange-document country=""AT"" doc-number=""380509"" family-id=""38826527"" kind=""T"" system=""ops.epo.org"">
              <bibliographic-data>
                <publication-reference data-format=""docdb"">
                  <document-id>
                    <country>AT</country>
                    <doc-number>380509</doc-number>
                    <kind>T</kind>
                    <date>20071215</date>
                  </document-id>
                </publication-reference>  
                <parties>
                  <applicants>
                  </applicants>
                  <inventors>
                  </inventors>
                </parties>
              </bibliographic-data>
            </exchange-document>
          </exchange-documents>
        </worldpatentdata>");

        var a = xml.Descendants().First(x => x.Name.LocalName == "exchange-documents");
        Console.WriteLine(a);

great! :) XLinq is really nice to work with XML, many prefer it to XPath. — Stéphane, May 07 '10 at 11:59

score 0 · Answer 3 · answered May 05 '10 at 07:38

0

Put the complete path for the xpath to retrieve.

answered May 05 '10 at 07:38

Kangkan

15,267
10
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Like this "worldpatentdata/exchange-documents/exchange-document" ? Still am receiving null response – Googler May 05 '10 at 07:47
You need to put the expression like this: "/worldpatentdata/exchange-documents/exchange-document". – Kangkan May 05 '10 at 09:01

Absolute Xpath to get list of childnodes?

3 Answers3