In X - No-Archive (abbreviated XNA or xnay ) is a header row of a Usenet article, with the article author may request that the appropriate article should not be included in archives.
Origin and background
Usenet article is after the Flood -fill principle to all world news server, perform at least one of the newsgroups to which the article in question was sent. Usually holds a news server products are only available for a limited time then deleting some point. However, this is nowhere defined and is more pragmatic reasons. Firstly, the memory of a server is limited, on the other hand are old products in large quantities for most users are not of interest. Usenet discussions had always a volatile character, because after a certain time older articles were no longer visible to everyone so for some participants.
The web-based Usenet Article Archive Deja News had it in the mid- 1990s set the goal as many articles unlimited vorzuhalten long. To give Usenet participants the opportunity to exclude their contributions from being accepted into the archive, it was thought in 1995 the header X - No-Archive from. Like all headers whose names begin with X, it involves an unofficial optional header. The only meaningful and defined value is yes. Translated, the entire header line X - No-Archive: Yes No thus Archive: yes. It is sometimes abbreviated as XNA or xnay.
Attention from archives
Both Deja News and its successor service Google Groups note that header and give xnay articles not in their search results. Google Groups 2 indicates those items within discussion threads for up to seven days after sending, but suppressed it within this time interval as a search result.
To allow the use of even users whose newsreader setting new header not allowed in Google Groups for the inclusion of X - No-Archive is yes as the first line observed in the body of the article.
It also exist a number of websites that offer Usenet articles over the past few months. Some of these sites are not aware xnay. However, this is due to the limited retention time, strictly speaking, not to archives.
The use of xnay is Usenet controversial, its meaning is discussed regularly. You to consider that as the automatic data collection and the transparent people can be counteracted users. Opponents argue that answers to xnay articles are still archived - so the original can be read indirectly - and also exist non-public archives that do not follow the header. Thus, a protection whether by xnay window dressing, and one should use appropriate measures to actually protect his privacy.
Impairment of the archive
Some Usenet users consider long-term archives as part of the Usenet ( by integration of the archives can be avoided redundant questions ). You do not like the use and observance of xnay as archives less complete and thus are less valuable as a source of information. Some of these participants respond so explicitly not to articles in which xnay is set.
Protest against Google Groups
Since Google Groups offers the possibility to write and submit articles, there are a number of Usenet participants who are dissatisfied with the way how the company deals with the misuse of this service. In fact, there exists a variety of spam articles that are submitted via Google's own news server. In protest against the lack of intervention from their perspective of Google Inc. Some Usenet users are deliberately xnay the header row to make Google's archive less valuable and in order not to contribute to the commercial success of Google itself.
In the next specification of Usenet articles format a header for official statements on the willingness to archiving is provided. He is hot archives and has the possible values yes and no order can agree explicitly as the author of archiving or reject them. As a third option you can still give up a statement for archiving by no sets this line.