>[!abstract] >A typed link carries some semantic information, which allows the system to manage data more efficiently on behalf of the user. A default type ("untyped") normally exists in some form when types are implemented. Some link types for example express relationships between the things described by two nodes: >- A is part of B / B includes A >- A made B / B is made by A >- A uses B / B is used by A >- A refers to B / B is referred to by A > >([[Berners-Lee, 1990]]). >[!related] >- **North** (upstream): — >- **West** (similar): — >- **East** (different): — >- **South** (downstream): [[Idea compass]]; [[Navigation problem]]