A hyperlink referring to a document in the same directory as the current one: ../examples of using ADDRESS tag.

A hyperlink referring to a document elsewhere: HUT.

A hyperlink in which the link text contains markup: The HTML test set

A hyperlink referring to a label in the same document: final example.

A hyperlink referring to a label in another document: URL info in HTML Primer

A link to an image: a family picture.

Finally, this is just text to which you can refer with a hyperlink.