13. A computer-readable storage device comprising instructions for controlling a computer system to edit 2D structures using a natural input method, wherein the instructions, upon execution, cause a processor to perform actions comprising: receiving from a typeset application a typeset format representation of a 2D object; converting the 2D object from the typeset format representation to a digital ink representation of the 2D object; providing the converted digital ink representation of the 2D object to a natural input application, wherein the natural input application includes at least one recognizer for a specific 2D domain; receiving modified typeset format representation of the 2D object from the recognizer of the natural input application; and providing the modified typeset format representation of the 2D object to the typeset application.
13. A computer-readable storage device comprising instructions for controlling a computer system to edit 2D structures using a natural input method, wherein the instructions, upon execution, cause a processor to perform actions comprising: receiving from a typeset application a typeset format representation of a 2D object; converting the 2D object from the typeset format representation to a digital ink representation of the 2D object; providing the converted digital ink representation of the 2D object to a natural input application, wherein the natural input application includes at least one recognizer for a specific 2D domain; receiving modified typeset format representation of the 2D object from the recognizer of the natural input application; and providing the modified typeset format representation of the 2D object to the typeset application. 14. The device of claim 13 wherein the 2D object is a mathematical equation and the typeset format representation is MathML.