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.