[1] スラッシュドット ジャパン | purl.org、スパムサイト過多により管理不能に ( 版) <http://slashdot.jp/article.pl?sid=07/01/06/2110217&from=rss> (名無しさん 2007-01-07 02:16:17 +00:00)

[2] Linked Data Glossary ( ( 版)) <http://www.w3.org/TR/2013/NOTE-ld-glossary-20130627/#persistent-uniform-resource-locator>

[3] Persistent URLs ( ( 版)) <https://sites.google.com/site/persistenturls/>

[4] PURL Home Page ( 版) <https://purl.org/docs/index.html>

PURLs (Persistent Uniform Resource Locators) are Web addresses that act as permanent identifiers in the face of a dynamic and changing Web infrastructure. Instead of resolving directly to Web resources, PURLs provide a level of indirection that allows the underlying Web addresses of resources to change over time without negatively affecting systems that depend on them. This capability provides continuity of references to network resources that may migrate from machine to machine for business, social or technical reasons.

[5] Problems and Opportunities at purl.org (David Wood 著, 版) <https://lists.w3.org/Archives/Public/public-perma-id/2015Nov/0003.html>

[6] OCLC and Internet Archive work together to ensure future sustainability of Persistent URLs () <http://www.oclc.org/news/releases/2016/201623dublin.en.html>

DUBLIN, Ohio, 27 September 2016—OCLC and Internet Archive today announced the results of a year-long cooperative effort to ensure the future sustainability of purl.org. The organizations have worked together to build a new sustainable service hosted by Internet Archive that will manage persistent URLs and sub-domain redirections for purl.org, purl.com, purl.info and purl.net.

Since its introduction by OCLC in 1995, purl.org has become a key part of the Web, providing a source of Persistent URLs (PURLs) that redirect users to the correct hosting location for documents, data and websites as they change over time.

[7] PURL が管理され続けるのは結構なことだけど、 その行き先のサーバーが消失してると結局意味ないんだよなー。 結局問題は当該コンテンツが管理され続けるかどうかであって、 URL が変わらないなんて些細な問題だったんだ。

[8] PURL は短くならない短縮URLみたいなもんだな。。。