The type of trademark as well as an indicator of what sort of trademark symbol should be displayed.

Attribute Values

In Element

Value Meaning Behavior
doi Digital Object Identifier
Restriction: “doi” is the only class allowed for Biblio ID in this application.

In Element

Value Meaning Behavior
copyright A copyright
registered A registered trademark
service A service mark
trade A trademark
Restriction: The attribute is optional but in rendering, the value “trade” will be assumed.