Describes the type of external link — for example, the type of data being tagged “email”), or the access method (“file”, “uri”)
While this attribute may take any value, the values preferred by APA are listed below. Attribute values will be enforced via Schematron.
| Value | Meaning | Behavior |
|---|---|---|
| an email address | ||
| uri | typically, a Web address beginning with “http://” or “https://” | |
| file | a link to a file on a local file system. Typically used only within <supplementary-material>, to identify the specific supplementary files provided by the author | |
| Restriction: This attribute must be specified if the element is used. | ||