What is the Tk option database?
The Tk option database is a database of default option values maintained by Tk itself; every Tk application has one. The concept of the option database derives from something called the X Windows resource database; however, the option database is available in every Tk implementation, including those which do not use the X Windows system (e.g., Microsoft Windows). Full details about the Tk option database are beyond the scope of this document; both Practical Programming in Tcl and Tk by Welch, Jones, and Hobbs, and Effective Tcl/Tk Programming by Harrison and McClennan., have good introductions to it. Snit is implemented so that most of the time it will simply do the right thing with respect to the option database, provided that the widget developer does the right thing by Snit. The body of this section goes into great deal about what Snit requires. The following is a brief statement of the requirements, for reference.
