3. The computer readable storage medium of claim 1 , wherein a node in a tree hierarchy representation of a document represents a document object.
3. The computer readable storage medium of claim 1 , wherein a node in a tree hierarchy representation of a document represents a document object. 6. The computer readable storage medium of claim 3 , wherein a document object is selected from one of a table, a table cell, a visualization, a graphic, a watermark, a header, a footer, a portion of text, an image, a sub-report, and a link.