8. The method of claim 7 , wherein the context includes a structure of a set of context items, wherein a context item includes at least one item data.
8. The method of claim 7 , wherein the context includes a structure of a set of context items, wherein a context item includes at least one item data. 10. The method of claim 8 , further comprising: in response to reconstructing the context attached to the event, obtaining the structure of the set of context items and the at least one item data.