Parse .xml file in a specific way

Assuming the following (modified) XML:

<?xml version="1.0"?>
<root>
  <ContactPerson>
    <GivenName>John</GivenName>
    <FamilyName>Wayne</FamilyName>
    <PhoneFixList>
      <PhoneFix>78787878</PhoneFix>
    </PhoneFixList>
    <EmailList>
      <Email>[email protected]</Email>
    </EmailList>
  </ContactPerson>
  <ContactPerson>
    <GivenName>James</GivenName>
    <FamilyName>Stewart</FamilyName>
    <PhoneFixList>
      <PhoneFix>90909090</PhoneFix>
    </PhoneFixList>
    <EmailList>
      <Email>[email protected]</Email>
    </EmailList>
  </ContactPerson>
</root>

The XMLStarlet invocation

xml sel -t -m '//ContactPerson' -v 'concat(GivenName, " ", FamilyName, " ", PhoneFixList/PhoneFix, " ", EmailList/Email)' -nl file.xml

produces

John Wayne 78787878 [email protected]
James Stewart 90909090 [email protected]

The invocation of XMLStarlet contains an implicit loop over all ContactPerson nodes, and for each of these, the specific fields are concatenated to produce the correct output. The -nl at the end causes a newline to be printed.

With xml2 (and a shell with support for the $'...' quotes):

{ echo "<r>"; cat file.xml; echo "</r>"; } |
  | xml2 | 2csv -d $'\t' ContactPerson GivenName FamilyName EmailList/Email

(for ContactPersons with more than one email address, the last one is returned)

If you're OK with having a second file for processing this, you can make an XSLT file and use it to transform your XML file using xsltproc.

phones.xsl:

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>
<xsl:strip-space elements="*"/>
<xsl:template match="ContactPerson">
  <xsl:value-of select="GivenName"/><xsl:text> </xsl:text><xsl:value-of select="FamilyName"/>
  <xsl:for-each select="PhoneFixList/PhoneFix">
    <xsl:text> </xsl:text><xsl:value-of select="."/>
  </xsl:for-each>
  <xsl:for-each select="EmailList/Email">
    <xsl:text> </xsl:text><xsl:value-of select="."/>
  </xsl:for-each>
  <xsl:text>&#xA;</xsl:text>
</xsl:template>
</xsl:stylesheet>

Then transform the file (using @Kusalananda's XML as phones.xml):

$ xsltproc phones.xsl phones.xml
John Wayne 78787878 [email protected]
James Stewart 90909090 [email protected]

Using XSLT has the advantage that you can loop through repeating elements, do conditional output and so forth. If you're comfortable with a bit of study and programming, it's very powerful.