2. The method of claim 1 wherein the adjusting of the wrapper tree includes merging a wrapper tree for the selected document tree and the created wrapper tree.
2. The method of claim 1 wherein the adjusting of the wrapper tree includes merging a wrapper tree for the selected document tree and the created wrapper tree. 3. The method of claim 2 wherein the creating of a wrapper tree for a document tree includes combining consecutive sub-forests of nodes within the document tree.