Published citation style guides
| Citation Style | APA | MLA | Chicago | Harvard | Vancouver | IEEE | AMA | Bluebook | CS1 |
|---|---|---|---|---|---|---|---|---|---|
| No date formatting | n.d. | (omit) | n.d. | no date | [date unknown] | (omit) | date unknown | (omit and use last visited date) | n.d. |
| Access date formatting | Retrieved | Accessed | Accessed | accessed | [Accessed] | Accessed: | Accessed | (last visited) | Retrieved |
| Archive date formatting | Replaces the URL | Replaces the URL | Archived ... at | Replaces the URL | ? | ? | Replaces the URL | [URL] | Archived from |
Existing documentation overview
Wikipedia:Link rot (howto)
- 186K annual pageviews
- Does mention "Content drift" but in a glossary
- Does not mention
|url-status=deviated - Does not describe the process for locating drifted content
- Does not cover news tickers
Wikipedia:Archive your sources (essay)
- 1K annual pageviews
- Does not mention "Content drift"
- Does not mention CS1 parameters
- Does not describe the process for locating drifted content
- Does not cover news tickers
Wikipedia:Verifiability (policy)
- 1,107K annual pageviews
- Does not mention "Content drift"
- Does not mention CS1 parameters
- Does not describe the process for locating drifted content
- Does not cover news tickers
Wikipedia:Citing sources (guideline)
- 711K annual pageviews
- Does not mention "Content drift" (does have the section Wikipedia:Citing sources § Preventing and repairing dead links with the shortcut WP:DEADREF)
- Does not mention CS1 parameters
- Does not describe the process for locating drifted content
- Does not cover news tickers (says, "
Date you retrieved (or accessed) the web page (required if the publication date is unknown)
")
Help:Using the Wayback Machine (help)
- 43K annual pageviews
- Does not mention "Content drift"
- Does not mention
|url-status=deviated - Does not describe the process for locating drifted content (does have the section Help:Using the Wayback Machine § Archive close to a date and time
- Does not cover news tickers
Wikipedia:Build content to endure
- 3K annual pageviews
- Does not mention "Content drift"
- Does not mention CS1 parameters
- Does not describe the process for locating drifted content
- Does not cover news tickers
Template:Cite web/doc (doc)
- 4K annual pageviews
- Does not mention "Content drift"
- Does mention
|url-status=deviated("deviated – selects |archive-url=; used when |url= is still live but no longer supports the text in a Wikipedia article
") - Does not describe the process for locating drifted content
- Does not cover news tickers
Template:Cite news/doc (doc)
- Does not mention "Content drift"
- Does mention
|url-status=deviated("deviated – selects |archive-url=; used when |url= is still live but no longer supports the text in a Wikipedia article
") - Does not describe the process for locating drifted content
- Does not cover news tickers
Wikipedia:Manual of Style/Dates and numbers (guideline)
- Does not mention "Content drift"
- Does mention CS1 parameters but not
|url-status=} - Does not describe the process for locating drifted content
- Does not cover news tickers
Discussions
- Help talk:Citation Style 1/Archive 78 § Current version of page no longer contains cited facts. url-status=?
- Summary→URL status values are discussed for links that are live but host different content; "deviated" is suggested.
- Help talk:Citation Style 1/Archive 84 § url-status = deviated
- Summary→When a deviated link becomes a dead link, remove "|url-status=deviated". No change in output.
- Help talk:Citation Style 1/Archive 96 § clean up usurped / unfit / deviated
- Summary→Several participate in a discussion around confusion and mistakes with citations.
- Module talk:Footnotes/Archive 3 § "n.d.a" vs. "n.d. a"
- Summary→CS1 and the shortened footnote templates accept appended letters in the format of "n.d.x" for multiple undated citations to the same author. They don't accept "n.d. x" (with a space, as an editor suggests) or "n.d.-x" (with a hyphen, as APA suggests).
Observations
WP. EM. OR. RS. NS. CS. Wikipedia guidelines ask editors to "remove hopelessly-lost web-only sources", treat the previously cited content "as unverified", and in some cases to remove it.US. RJ1. Because Wikipedia is a user-generated encyclopedia that is considered unreliable, editors place a greater importance on citations than many conventional publications.RJ2. Unlike conventional publications, Wikipedia cannot ask its readers to trust the author, peer reviewers, editors, or publishers of any particular article, since articles can be written by anyone. Thus, Wikipedia broadly does not accept nonrecoverable sources.RJ3. Wikipedia has a unique need to preserve sources to an extent not covered by published style guidelines.RJ4. Wikipedia has technical solutions available to cite content that may not just become dead, but to cite sources that may experience "content drift" so that the nature of what is present at the URL changes.RJ5. The technical solutions are not well-documented. They are also not well understood by many editors.