Relative transformation (simplified)

• For each node N in the output tree to which my X is transformed, create a node Y as a Z of N.
• For each node in the output tree to which my parent is transformed, create a copy of me as a child of that node.
• Call the node to be transformed the current match.
• Call the node relative to which the current match is to be transformed the leader node.
• Call the nodes to which the leader node is transformed the leader destinations.
• X = relationship of leader node to current match. Often parent or owner.
• Y = type and properties of node to be created. Often copy of node being transformed
• Z = relationship of node to be created in output tree to a leader destination: child, attribute, preceding sibling, following sibling.