Data in a document are displayed according to a transformation stylesheet, and the transformation stylesheet is automatically updated in response to a document modification made using a graphical editor. Mapping between the transformation stylesheet and the document is automated, so that user modifications to the document or to the transformation stylesheet are automatically incorporated in both. The transformation stylesheet is automatically annotated to create the mapping, and the data are transformed according to the annotated transformation stylesheet. Annotations are carried over to the resulting document. The annotations map nodes within the document to corresponding nodes in the transformation stylesheet. Annotations affected by modifications to the document are translated and replace corresponding nodes in the transformation stylesheet. The updated transformation stylesheet is re-annotated and the data are again transformed. Differences between the updated document and the original document are merged into the original document to maintain user selection information.