10. The method of claim 1 , wherein the data file is further classified within a lower node of the hierarchical structure based on a social organization characteristic of the classified data file, an individual descriptive characteristic of the classified data file, or an operational characteristic of the classified data file, wherein the social organization characteristic indicates a social position associated with a creator of the classified data file, wherein the individual descriptive characteristic indicates a personal characteristic of the creator of the classified data file, and wherein the operational characteristic indicates characteristics of message exchange associated with the classified data file.
10. The method of claim 1 , wherein the data file is further classified within a lower node of the hierarchical structure based on a social organization characteristic of the classified data file, an individual descriptive characteristic of the classified data file, or an operational characteristic of the classified data file, wherein the social organization characteristic indicates a social position associated with a creator of the classified data file, wherein the individual descriptive characteristic indicates a personal characteristic of the creator of the classified data file, and wherein the operational characteristic indicates characteristics of message exchange associated with the classified data file. 20. The method of claim 10 , further comprising: classifying the data file within the lower node of the hierarchical structure by classifying the data file based on the operational characteristic first, classifying the data file based on the individual descriptive characteristic second, and classifying the data file based on the social organization characteristic third.