Links
A link represents a relationship between artifacts. Links
are mechanisms for referring to related information. For example,
a user interface sketch can include links to a storyboard that includes
the sketch. A link can originate from an artifact, an
element within an artifact, a document, or a range of text within
a document. For external artifacts, such as Microsoft® Word
documents, that are uploaded to the project, you can only create links
at the artifact level.