3. The method of claim 1 further comprising, strengthening links between the text snippets and the related files in the context graph based on a length of time over which a text snippet is visible and a temporal distance between the text snippet and a file event.
3. The method of claim 1 further comprising, strengthening links between the text snippets and the related files in the context graph based on a length of time over which a text snippet is visible and a temporal distance between the text snippet and a file event. 5. The method of claim 3 , wherein the temporal distance between the text snippet and the file event is defined as: 
 proximity ( S,F )=min(| t F −S start |, |t F −S end |)/(contextinteral×½), where t F is a time at which the file event starts, S start is a point at which the text snippet is seen that is not similar to a previous text snippet, S end is a point at which a new text snippet that is not similar to S is seen, and contextinterval is a time period during which the text snippet is considered related to the file.