Item-Document Specification Link
There are two types of relations (link types) between items and documents:
- Specification document - One or more documents that define the item. When this document changes, the item is changed. An example of a sub-type is the solid model that defines the CAD structure. It is linked to the item by a Specification document (SD) link.
- General reference document - any additional documentation. It is linked to the item by a General reference document (GD) link.