Editing Template:Citation Style documentation/registration

<span id="csdoc_access_level"></span>
Citations of online sources that require registration or a subscription are acceptable in Wikipedia as documented in [[WP:PAYWALL|Verifiability § Access to sources]]<!-- {{Section link|Wikipedia:Verifiability|Access to sources}} -->. As a courtesy to readers and other editors, editors should<!-- can --> signal restrictions on access to material provided via the external links included in a citation. These levels describe requirements or constraints related to accessing and viewing the cited material; they are not intended to indicate the ability to reuse, or the copyright status, of the material, since that status is not relevant to [[WP:V|verifying claims in articles]]. 

<!-- There are four access levels split between the url-holding parameters and the identifier parameters. -->Four access levels can be used:
*[[#Access indicator for named identifiers|access indicator for named identifiers]]:
** [[File:Lock-green.svg|9px|link=|alt=Freely accessible|Freely accessible]] <code>free</code>: the source is free to read for anyone (from the viewpoint of the provider of the source &ndash; could still be blocked by client-side filtering or safeguarding, or distributor-based geoblocking<!-- to be distinguished from geoblocking by the provider of the source -->)
*[[#Access indicators for url-holding parameters|access indicators for url-holding parameters]]:
** [[File:Lock-gray-alt-2.svg|9px|link=|alt=Free registration required|Free registration required]] <code>registration</code>: a free registration with the provider of the source is required to access the source, even if a limited preview, abstract or review may still be available without registration
** [[File:Lock-gray-alt-2.svg|9px|link=|alt=Free access subject to limited trial, subscription normally required|Free access subject to limited trial, subscription normally required]] <code>limited</code>: there are other constraints (such as a cap on daily views, a restriction to certain day or night times, or providing the contents only to certain IP ranges/locales on behalf of the provider of the source<!-- to be distinguished from geoblocking by other parties -->) to freely access this source as a whole
** [[File:Lock-red-alt-2.svg|9px|link=|alt=Paid subscription required|Paid subscription required]] <code>subscription</code>: the source as a whole is only accessible via a paid subscription with the provider of the source ("[[paywall]]"), even if a limited preview, abstract or review may still be available without subscription

As there are often multiple external links with different access levels in the same citation, each value is attributed to a specific external link.

=====Access indicators for url-holding parameters=====

Online sources linked by {{para|url}}, {{para|article-url}}, {{para|chapter-url}}, {{para|contribution-url}}, {{para|entry-url}}, {{para|map-url}}, and {{para|section-url}} are presumed to be free-to-read. When they are not free-to-read, editors should mark those sources with the matching access-indicator parameter so that an appropriate icon is included in the rendered citation. Because the sources linked by these url-holding parameters are presumed to be free-to-read, they may not be marked as <code>free</code>.

{| class="wikitable plainrowheaders"
|+ URL-holding and access-indicator parameters
|-
!scope="col"| URL
!scope="col"| Access
!scope="col"| Allowed keywords
|-
!scope="row"| {{para|url}}
| {{para|url-access}} || rowspan="7" | <code>registration</code> [[File:Lock-gray-alt-2.svg|9px|link=|alt=Free registration required|Free registration required]]<br /><code>limited</code> [[File:Lock-gray-alt-2.svg|9px|link=|alt=Free access subject to limited trial, subscription normally required|Free access subject to limited trial, subscription normally required]]<br /><code>subscription</code> [[File:Lock-red-alt-2.svg|9px|link=|alt=Paid subscription required|Paid subscription required]]
|-
!scope="row"| {{para|article-url}}
| {{para|article-url-access}}
|-
!scope="row"| {{para|chapter-url}}
| {{para|chapter-url-access}}
|-
!scope="row"| {{para|contribution-url}}
| {{para|contribution-url-access}}
|-
!scope="row"| {{para|entry-url}}
| {{para|entry-url-access}}
|-
!scope="row"| {{para|map-url}}
| {{para|map-url-access}}
|-
!scope="row"| {{para|section-url}}
| {{para|section-url-access}}
|}
{{reflist}}

For example, this cites a web page that requires registration but not subscription:

:<nowiki>{{cite web |url=https://example.com/nifty_data.php |url-access=registration |date=2021-04-15 |title=Nifty example data}}</nowiki>

which renders as:

:{{cite web |url=https://example.com/nifty_data.php |url-access=registration |date=2021-04-15 |title=Nifty example data}}

=====Access indicator for named identifiers=====
<!-- ====Access level of identifiers==== -->
<!--
Links inserted by identifiers such as {{para|doi}} are not expected to offer a free full text by default. If they do, editors can use {{para|doi-access|free}} (in the case of {{para|doi}}) to indicate the relevant access level.

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 {{para|arxiv}}, {{para|biorxiv}}, {{para|citeseerx}}, {{para|pmc}}, {{para|rfc}} and {{para|ssrn}}.

{| class="wikitable plainrowheaders"
|+identifier parameter access icons
!scope="col"| url parameter
!scope="col"| access icon parameter
!scope="col"| supported keywords
|-
!scope="row"| {{para|bibcode}}
| {{para|bibcode-access}} ||rowspan="6"|<code>free</code> – [[File:Lock-green.svg|9px|link=|alt=Freely accessible|Freely accessible]] – the source is free to read for anyone (not supported by {{para|url-access}})
|-
!scope="row"| {{para|doi}}
| {{para|doi-access}}
|-
!scope="row"| {{para|hdl}}
| {{para|hdl-access}}
|-
!scope="row"| {{para|jstor}}
| {{para|jstor-access}}
|-
!scope="row"| {{para|ol}}
| {{para|ol-access}}
|-
!scope="row"| {{para|osti}}
| {{para|osti-access}}
|}
-->
Links inserted by named identifiers are presumed to lie behind a paywall or registration barrier – exceptions listed below. When they are free-to-read, editors should mark those sources with the matching access-indicator parameter so that an appropriate icon is included in the rendered citation.  When the sources linked by these named-identifier parameters are not presumed to carry a free-to-read full text (for instance because they're just abstracting services), they may not be marked as <code>limited</code>, <code>registration</code>, or <code>subscription</code>.

{| class="wikitable plainrowheaders"
|+ Named-identifier and access-indicator parameters
|-
!scope="col"| Identifier
!scope="col"| Access
!scope="col"| Allowed keywords
|-
!scope="row"| {{para|bibcode}}
| {{para|bibcode-access}} || rowspan="7" | <code>free</code> [[File:Lock-green.svg|9px|link=|alt=Freely accessible|Freely accessible]]
|-
!scope="row"| {{para|doi}}
| {{para|doi-access}}
|-
!scope="row"| {{para|hdl}}
| {{para|hdl-access}}
|-
!scope="row"| {{para|jstor}}
| {{para|jstor-access}}
|-
!scope="row"| {{para|ol}}
| {{para|ol-access}}
|-
!scope="row"| {{para|osti}}
| {{para|osti-access}}
|-
!scope="row"| {{para|s2cid}}
| {{para|s2cid-access}}
|}

Some named-identifiers are always free-to-read. For those named identifiers there are no access-indicator parameters; the access level is automatically indicated by the template. These named identifiers are:
*{{para|arxiv}}
*{{para|biorxiv}}
*{{para|citeseerx}}
*{{para|pmc}}
*{{para|rfc}}
*{{para|ssrn}}

For embargoed {{#invoke:cs1 documentation support|canonical_name_get|PMC}} that will become available in the future, see {{#invoke:cs1 documentation support|canonical_name_get|Embargo|id=csdoc_Embargo}}.