I have a xml document in a string
I would like to read the value of the tag, which has more than one reference in the full XML, so I can't read it uniquely with other methods. I tried with this code:

```
            XDocument cdafile = XDocument.Parse(cXml)//The Xml code;

            var myElement = cdafile.Elements("recordTarget").Elements("patientRole").Elements("patient").Elements("name").Elements("given");

```

But the value is always empty. Maybe I should enter the namespace urn: hl7-org: v3, but I don't know how.

**Here is the xml code.**

```
<?xml version="1.0" encoding="UTF-8"?>
<ClinicalDocument xsi:schemaLocation="urn:hl7-org:v3 CDA.xsd" 
xmlns="urn:hl7-org:v3" xmlns:mif="urn:hl7-org:v3/mif" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <recordTarget>
    <patientRole classCode="PAT">
      <id root="2.16.840.1.113883.2.9.4.3.2" extension="DC234RT566Y7" 
assigningAuthorityName="LONDON" />
      <addr use="HP">
        <houseNumber>5</houseNumber>
        <streetName>MY STREET NAME</streetName>
        <city>LONDON</city>
        <postalCode>12345</postalCode>
        <county>GB</county>
      </addr>
      <patient>
         <name>
          <given>NAME</given>
          <family>SURNAME</family>
        </name>
        <administrativeGenderCode codeSystem="2.16.840.1.113883.5.1" code="F" displayName="F" />
        <birthTime value="20030215" />
        <birthplace>
          <place>
            <addr>
              <county>GB</county>
              <city>LONDON</city>
              <postalCode />
            </addr>
          </place>
        </birthplace>
      </patient>
    </patientRole>
  </recordTarget>
  <author>
    <time value="20200429110507" />
    <assignedAuthor>
      <id root="2.16.840.1.113883.2.9.4.3.2" extension="CF1234567890" 
assigningAuthorityName="NYC" />
  <id root="2.16.840.1.113883.2.9.2.160.4.2" extension="414681" 
assigningAuthorityName="LONDON" />
      <assignedPerson>
        <name>
          <prefix>DR.</prefix>
          <given>DRNAME</given>
          <family>DRSURNAME</family>
        </name>
      </assignedPerson>
    </assignedAuthor>
  </author>
</ClinicalDocument>

```