That said, each artifact is unique; in fact one of the characteristics of all folklore artifacts is their variation within genres and types. This is in direct contrast to manufactured goods, where the goal in production is to create identical products and any variations are considered mistakes. It is however just this required variation that makes identification and classification of the defining features a challenge. And while this classification is essential for the subject area of folkloristics, it remains just labeling, and adds little to an understanding of the traditional development and meaning of the artifacts themselves.