Group item

#define HWI_TAG_NAME_group  "Group"
#define HWI_TAG_ALIGN_group (sizeof(uint32_t))
struct hwi_group {
    struct hwi_item     item;
};

The Group item is used when you wish to group a number of items together. It serves the same purpose as a directory in a filesystem. For example, the devclass level of the /hw tree would use a Group item.