nokogiri_example.rb

# find node name is gd:email and attribute rel value contains work wording
node = doc.xpath("//*[name()='gd:email'][contains(@rel, 'work')]").first

# change email address attribute value
node.attributes["address"].value = value[:address]

# change node content <node>{content is here}</node>
node.content = value

# remove all nodes that name is gd:phoneNumber
doc.xpath("//*[name()='gd:phoneNumber']").remove

# add node
doc.children.children.last.add_next_sibling(
 %Q|<gd:phoneNumber #{attr} primary="#{!!phone_value[:primary]}">#{phone_value[:number]}</gd:phoneNumber>|
)