Grouping also can be used for scoping, i.e. some node types, when placed n a group, only affect the other nodes within the same group. For instance, Directional Lights only affect nodes within the same group (at least according to the official VRML 2.0 specification). Sensor nodes are also constrained to the group their defined in. )
You can place groups inside groups, creating a hierarchical structure of nodes. A group node can have any number of child nodes inside the children field.
All grouping nodes accept the following events: