10. The method of claim 1 , wherein the subset of the document corresponds to a cursor location on the document.
10. The method of claim 1 , wherein the subset of the document corresponds to a cursor location on the document. 12. The method of claim 10 , further comprising: receiving from the respective client system the cursor location on the document; and identifying the one or more key words in the received subset of the document in accordance with the cursor location on the document.