Template:Citation Style documentation/registration
Citations of online sources that require registration or a subscription are acceptable in Wikipedia as documented in Verifiability – Access to sources. As a courtesy to readers and other editors, editors can signal the access restrictions of the external links included in a citation.
Four access levels can be used:
- Freely accessible
free: the source is free to read for anyone (this applies in particular to articles in open access)
- Free registration required
registration: a free registration is required to access the source
- Free access subject to limited trial, subscription normally required
limited: there are other constraints (such as a cap on daily views) to freely access this source
- Paid subscription required
subscription: the source is only accessible via a paid subscription
As there are often multiple external links with different access levels in the same citation, these values are attributed to a particular external link.
Access level of
Links inserted with
|url= are expected to be free to read by default. If not, editors can use one of
to indicate the relevant access restriction.
Access level of identifiers
Links inserted by identifiers such as
|doi= are not expected to offer a free full text by default. If they do, editors can use
|doi-access=free (in the case of
|doi=) to indicate the relevant access level. The following identifiers are supported:
Some identifiers always link to free full texts. In this case, the access level is automatically indicated by the template. This is the case for
Ambiguous access parameters
|subscription=yes can also be used to indicate the access level of a citation. However, they do not indicate which link they apply to, so editors are encouraged to use
|url-access=subscription instead, when the restriction applies to
|url=. If the restriction applies to an identifier, these parameters should be omitted.
These parameters add a link note to the end of the citation:
- registration: For online sources that require registration, set
true); superseded by subscription if both are set.
- subscription: For online sources that require a subscription, set
true); supersedes registration if both are set.
|subscription= to any value other than
true will generate an error message.