User Guide

Command Groups 205

Command Groups

There are six groups of navigation commands, consisting of a total of 39 instructions, as

shown in Table 7.

Command Types

There are three types of navigation commands you can create from the six command

groups:

Type 1 Commands made from one instruction from any command group. Note that

Compare, when combined with GoTo, Link, or Jump, is classiﬁed as a Type 1 command in

the DVD Speciﬁcation.

Type 2 Commands made from two instructions. You can form a Type 2 command by using

Compare with Set or SetSystem. Set or SetSystem, when used either by themselves or with

Link or Compare, are also classiﬁed as Type 2 commands in the DVD Spec.

Type 3 Commands made from the Compare, Set, and LinkSIns (Link by SubInstruction)

commands.

Table 7: Command groups and functions

Group Major Function Can be Combined With

Link Starts video within current domain Set, Compare, SetSystem

Jump Starts video in speciﬁed domain Compare

GoTo Goes to another navigation command Compare

Compare Compares speciﬁed values Link, Set, SetSystem, GoTo, Jump

SetSystem Sets navigation parameters Link, Compare

Set Calculates GPRM values Link, Compare