This is achieved via Vocabularies and Interface Descriptions. In traditional computer architectures, organization is tightly coupled to storage, the typical hierarchy of files and directories within a single filing system. It presents a structureless sea of binary elements. Structure and organization comes from throwing questions into the sea and getting back the answers. This querying service is supported by the vocabularies and interface descriptions and uses the concept of sets to process, persist and group.
Queries can be static, dynamic, transient and persistent.
Instead of some arbitrary hierarchical distinction that allows for only one reference, users can now make associative and relational sense of their digital environment. How they are stored is the business of the persistence service. Their concern is that when they have finished with something it is persisted, and when they want to use it again, it is available. Instead, users perform activities. They may fetch a piece of paper, to write an essay, an email, or draw a picture.