Aarne–Thompson classification system

So, sir asked to blog on something that we found interesting in the lesson on Tuesday! When he mentioned the Aarne-Thompson classification system I found it quite interesting that such thing existed. So from looking at what I have read so far the system was started by a woman named Antti Aarne, the actual system was published in 1910. Whats so interesting about it is that the system was designed to help folkorists could identify and organize recurring plot patterns and narrative structures so that they could analyze them put together. The classification simply works by dividing tales into sections with an "AT" number for each entry. The names given are typical, but usage varies; the same tale type number may be referred to by its central motif or by one of the variant folktales of that type, which can also vary, especially when used in different countries and cultures. The tale type does not have to be accurate for every folktale. For example, The Cat as Helper (545B) also includes tales where a fox helps the hero.
However, there is difficulty using the system as it is sometimes hard to classify a certain tale, for example, Rapunzel is classified as 310 (as there is a maiden stuck in the tower) but the story opens with a child being demanded in return for stolen food, as does the fairytale Puddocky, but Puddocky is not a maiden in the tower tale like Rapunzel. So the system does have its disadvantages like folklorists can describe two tales to be classed as the same but this eliminates the details in the actual story turning it into something else. This analysis has been criticized for ignoring tone, mood, characters and, indeed, anything that differentiates one fairy tale from another.