Database management system

A method of querying a database system, the database system comprising at least one database populated with a plurality of unique, multi-character expressions associated with data entities of the at least one database, the method comprising:

• providing a graphical user interface for receiving at least one input selection from a user defining a database query expression;
• scanning the at least one database with the database query expression to obtain a first set of results;
• parsing the first set of results with a user profile expression associated with the user to obtain a second set of results, the user profile expression comprising a unique, multi-character expression;
• and
• displaying the second set of results in the graphical user interface wherein the user profile expression defines a role of the user and associated permissions, the method comprising
• creating a role associated with the user, the creating a role comprising selecting permissions for the role at the graphical user interface which modifies bytes of the user profile expression to define the role associated with the user.