el1['id'] = self.id.to_s
el1['from'] = self.node_a.to_s
el1['to'] = self.node_b.to_s
+ el1['user'] = self.user.display_name if self.user.data_public?
Segment.split_tags(el1, self.tags)
el1['visible'] = self.visible.to_s
el1['timestamp'] = self.timestamp.xmlschema