13. A system for classifying data, comprising: a data store associated with a computing device, the data store containing multiple data objects generated by one or more applications associated with the computing device, the multiple data objects including— a first set of data objects generated by a first application; and a second set of data objects generated by a second application different from the first application; multiple data classification agents associated with the computing device, the multiple data classification agents including— a first data classification agent specific to only the first application and configured to automatically classify the first set of data objects into at least one of a first set of data classifications, wherein the first set of data classifications categorize the first set of data objects based on characteristics related to the use of the first set of data objects; and a second data classification agent specific to only the second application and configured to automatically classify the second set of data objects into at least one of a second set of data classifications, wherein the second set of data classifications categorize the second set of data objects based on characteristics related to the use of the second set of data objects; and a metabase update component configured to store metadata describing the multiple data objects and the at least one of the first and second set of data classifications for the first and second sets of data objects in a metabase.
17. The system of claim 13 wherein the first data classification agent automatically classifies data produced by a database application.