Editing Digital object identifier (section)

===Display===
The official ''DOI Handbook'' explicitly states that DOIs should be displayed on screens and in print in the format <code>doi:10.1000/182</code>.<ref name="C4WDefault-2811140">{{cite web |title=DOI Handbook – Numbering |date=13 February 2014 |website=doi.org |author1=<!--Staff writer(s); no by-line.--> |at=Section 2.6.1 Screen and print presentation |url=https://doi.org/doi_handbook/2_Numbering.html#2.6.1 |access-date=30 June 2014 |url-status=live |archive-url=https://web.archive.org/web/20140630181440/http://www.doi.org/doi_handbook/2_Numbering.html |archive-date=30 June 2014}}</ref>

Contrary to the ''DOI Handbook'', [[Crossref]], a major DOI registration agency, recommends displaying a URL (for example, <code><nowiki>https://doi.org/10.1000/182</nowiki></code>) instead of the officially specified format.<ref>{{cite web |title=DOI Display Guidelines |url=http://www.crossref.org/02publishers/doi_display_guidelines.html |access-date=19 October 2016 |url-status=live |archive-url=https://web.archive.org/web/20161124110844/http://www.crossref.org/02publishers/doi_display_guidelines.html |archive-date=24 November 2016}}</ref><ref>{{cite web |title=New Crossref DOI display guidelines are on the way |url=http://blog.crossref.org/2016/09/new-crossref-doi-display-guidelines.html |access-date=19 October 2016 |url-status=live |archive-url=https://web.archive.org/web/20161019215501/http://blog.crossref.org/2016/09/new-crossref-doi-display-guidelines.html |archive-date=19 October 2016}}</ref> This URL is persistent (there is a contract that ensures persistence in the doi.org domain,{{Citation needed|date=September 2024}}) so it is a [[PURL]]—providing the location of an [[name server|name resolver]] which will redirect [[HTTP request]]s to the correct online location of the linked item.<ref name="dd"/><ref>{{cite journal |last=Powell |first=Andy |title=Resolving DOI Based URNs Using Squid: An Experimental System at UKOLN |journal=D-Lib Magazine |date=June 1998 |issn=1082-9873 |doi=10.1045/june98-powell |doi-access=free |url=http://www.dlib.org/dlib/june98/06powell.html |access-date=23 April 2010 |url-status=live |archive-url=https://web.archive.org/web/20100613000342/http://dlib.org/dlib/june98/06powell.html |archive-date=13 June 2010}}</ref>

The Crossref recommendation is primarily based on the assumption that the DOI is being displayed without being hyperlinked to its appropriate URL—the argument being that without the hyperlink it is not as easy to copy-and-paste the full URL to actually bring up the page for the DOI, thus the entire URL should be displayed, allowing people viewing the page containing the DOI to copy-and-paste the URL, by hand, into a new window/tab in their [[Web browser|browser]] in order to go to the appropriate page for the document the DOI represents.<ref>{{cite web |title=Crossref Revises DOI Display Guidelines - Crossref |last=ChrissieCW |website=crossref.org |url=https://www.crossref.org/news/2011-08-02-crossref-revises-doi-display-guidelines/ |access-date=25 April 2018 |url-status=live |archive-url=https://web.archive.org/web/20180425114838/https://www.crossref.org/news/2011-08-02-crossref-revises-doi-display-guidelines/ |archive-date=25 April 2018}}</ref>