| Term: | urid |
| Definition: | The earliest identifier originally assigned to the first ancestor of the current object. Pronounced "oohr-eye-dee". |
| Examples: | Analogous to the German word "urtext". Besides the current object's identifier, an important alternate identifier to record is the urid. In a long chain of derivative objects, for which it is hard to record all the intermediate identifiers, an urid at least establishes a boundary of relatedness. |