Metacat

This class will write triple to db.

Move the code that writes triple to db to DBSAXHandler class.

Add code to parse triple.

Add a method to write error message into log file.

Revise code to handle text node be splitted into two nodes.

Revise update method. Every write action will check out a db connection. So it can handle a huge mount of write action.

Change a method from private to public and it can be shared by other class.

Revise code to handle text node were splited into two nodes.

Using triple rather than query to get relation.

Don't apply access rule for online data file.