Transformation complications

• Can create arbitrary subtree with children and attributes, not just single node.
• Can specify arbitrary query to navigate in the source tree from current match to leader node.
• Call the node relative to which new node is created as child/attribute/preceding sibling/following sibling the creation origin. Can specify path in output tree from leader destination to creation origin
• When a new subtree is created, for each node in that subtree, can specify label to identify transformation from node being transformed to that node. When transforming a node, can specify label that identifies transformation of leader node that should be used.
• When creating node, can specify relative order of nodes created with that node as creation origin and with same relationship to creation origin.