Abstract: According to the invention there is provided a method for retrieving the value of a first path of a first entity in a data system comprising a calculation device and a storage device with said first path stored thereon, said method comprising the step of said calculation device calculating said value as all calculated entities: that are descendants of said first entity; and that are members of said first path.

Abstract: A dynamically typed file system and method enables a user to perform calculations over the meta information associated with files, documents, or other entities stored in a non-transitory computer readable medium.