1. A method of modifying process control data, comprising: obtaining the process control data in an extensible markup language format; converting the process control data in the extensible markup language format to a second data format; storing the process control data in the second data format in a database; and editing the process control data by: retrieving the process control data from the database; modifying the process control data; storing the modified process control data in the second data format in the database; converting the modified process control data from the second data format to the extensible markup language format; and storing the modified process control data in the extensible markup language format.