Defines the standard for G1 rules (any, i.e. BNF and quantified)
- Multiple settings are possible.
- Usage is ordered.
- IOW each setting applies only to the rules coming after it in the grammar.
- action - Global parse action to perform. Specific actions can be declared at each rule.
- bless (Note: irrelevant to the Tcl binding. Usage causes a warning).
Note: Unspecified adverbs revert to the implicit default.
The implicit (and initial) default of action is "[values]".