Compound Objects are objects in a document which contains other objects. The following are compound object types:
 Group Contains one or more objects of any type
 Group Contains one or more objects of any type
 Blend Contains two or more objects of any type
 Blend Contains two or more objects of any type
 Text Object Contains one or more Text Lines
 Text Object Contains one or more Text Lines
 Text Line Contains one or more characters
 Text Line Contains one or more characters