...
What this does is it looks for the "realDescription" tag on the points in the db (its a copy of the "description" tag. all we did was duplicate it and called it realDescription) and reads the description. Then it goes and finds the device that point is coming from and tries to find the record with the same description. If it is found, it updates the points instance cur and/or write instances depending on what it is. If no matching description is found, then it won't update it since it doesn't exist in the device.
...