On the World Wide Web, web feeds (or news feeds ) is the data format used to provide users with frequently updated content. The content distributor syndicate of web feeds, allowing users to subscribe channels to it. Creating a collection of web feeds accessible in one place is known as aggregation , done by news aggregators. Web feeds are also sometimes referred to as syndicated feed .
Common use of web feed scenarios may involve the following: content providers publish feed links on their site that end users can use with the aggregator program (also called feed reader or newsreader ) runs on their own machines; doing this is usually as simple as dragging links from a web browser to an aggregator. When instructed, the aggregator requests all servers in its feed list if they have new content; if so, the aggregator will record the new content or download it. Someone can schedule aggregators to check for new content periodically.
Web feeds exemplify pull technology, although they may appear to push content to users.
The type of content submitted by web feeds is usually HTML (web page content) or links to web pages and other types of digital media. Often when a website provides a web feed to notify users about content updates, the website only includes a summary in the web feed rather than the full content itself.
Many news websites, weblogs, schools, and podcasters operate web feeds.
The Web Work feed has several advantages over receiving frequently published content via email:
- Users do not disclose their email addresses while subscribing to feeds and therefore do not increase their exposure to email-related threats: spam, virus, phishing, and identity theft.
- Users do not need to submit unsubscription requests to stop receiving news. They just remove the bait from their aggregators.
- Feed items are automatically sorted in each feed URL having their own set of entries (unlike email boxes where messages should be sorted by user-specified pattern and pattern matching).
In his explanation "What is a web feed?", Nature's publisher group explains the two benefits of a web feed:
- This makes it easy for users to track our content... This is a very easy way to keep abreast of content from a large number of sites.
- This makes it easy for other websites to link to our content. Because RSS feeds can be easily read by computers, it's also easy for webmasters to configure their sites so that the latest headlines from other site's RSS feeds are embedded into their own pages, and are updated automatically.
Video Web feed
Scraping
Typically web feeds are provided by the same entity that creates the content. Typically the feed comes from the same place as the website. Not all websites provide feed. Sometimes a third party will read the website and create a feed for it by scratching it. The erosion is still controversial because it distributes content in a way that is not selected by the author and can ignore web ads.
Maps Web feed
Technical definition
Web feed is a (often XML-based) document whose discrete content item includes a web link to the content source. News websites and blogs are a common source for web feeds, but they are also used to deliver structured information from weather data to top ten lists of hit songs to search results. The two main web feed formats are RSS and Atom.
"Publish feeds" and "syndications" are two of the more common terms used to describe the creation of available feeds for information sources such as blogs. Web feed content, such as features of syndicated newspaper or broadcast programs, may be shared and republished by other websites. (For that reason one of the popular RSS definitions is Really Simple Syndication.)
Feeds are more often subscribed directly by users with aggregators or feed readers that combine content from multiple web feeds to display on a single screen or a series of screens. Some modern web browsers incorporate aggregator features. Users typically subscribe to feeds by entering feed URL manually or clicking links in a web browser.
Web feeds are designed to be machine-readable rather than human readable, which tends to be a source of confusion when people first find a web feed. This means web feeds can also be used to transfer information automatically from one site to another without human intervention.
Confusion between web feed and RSS
The term RSS is often used to refer to web feeds or web syndication in general, although not all feed formats are RSS. Blogspace descriptions of the use of web feeds in aggregators, for example, are the main "RSS info" and "RSS readers," although the first phrase makes clear the inclusion of the Atom format: "RSS and Atom files provide news updates from websites in a simple form for your computer. "
Feed icon
The feed icon is to indicate that a web feed is available on a webpage. Originally created for the use of RSS, but also common for Atom and other web feeds now. The icon is usually orange, with hex # FA9B39. The original icon was created by Stephen Horlander, a designer at Mozilla.
Icons are used in aggregators, the web browser's address bar to indicate the availability of web feeds, as well as on web pages to subscribe directly.
The RSS format is specified using XML, a general specification for creating the data format. Although the RSS format has evolved since March 1999, the RSS ("") icon was first used widely between 2005 and 2006.
History
Dave Winer publishes a modified version of the 0.91 RSS specification on the UserLand website, which includes how it is used in its corporate product, and claims the copyright to the document. A few months later, UserLand filed a US trademark registration for RSS, but failed to respond to a USPTO trademark inspector request and the request was rejected in December 2001.
The RSS-DEV Working Group, a project whose members include Guha and representatives from O'Reilly Media and In addition, produced RSS 1.0 in December 2000. This new version, which reclaimed RDF Site Summary from RSS 0.9, reintroduced support for RDF and add XML namespace support, adopt elements from standard metadata vocabulary such as Dublin Core.
In December 2000, Winer released RSS 0.92 a set of small changes apart from the introduction of the enclosure element, which allowed audio files to be loaded in RSS feeds and helped trigger podcasting. He also released a draft of RSS 0.93 and RSS 0.94 which was later withdrawn.
In September 2002, Winer released a new version of the format, RSS 2.0, which repeated the initials Really Simple Syndication. RSS 2.0 removes the type attribute added in the 0.94 RSS draft and adds support for namespaces.
Because Winer and the RSS-DEV Working Group have no Netscape engagement, they can not make official claims on behalf of or RSS format. This has sparked an ongoing controversy in the syndication development community for which entity is the right RSS publisher.
One controversial product of the debate is the creation of an alternative syndication format, Atom, which began in June 2003. The Atom syndication format, whose creation was partially motivated by the desire to get a clean start free from RSS issues, has been adopted as RFC 4287.
In July 2003, Winer and UserLand Software assigned the copyright of the RSS 2.0 specification to the Harvard Berkman Center for Internet & amp; Society, where he has just started a term as a visiting guest. At the same time, Winer launched an RSS Advisory Board with Brent Simmons and Jon Udell, a group aimed at maintaining and publishing specifications and answering questions about the format.
In December 2005, the Microsoft Internet Explorer team and the Outlook team announced on their blog that they adopted the first feed icon used in the Mozilla Firefox browser, created by Stephen Horlander, a Mozilla Designer. A few months later, Opera Software followed. This effectively creates an orange box with industry standard white radio waves for RSS and Atom feeds, replacing previously used icons and text to identify syndicated data.
In January 2006, Rogers Cadenhead relaunched the RSS Advisory Board without Dave Winer's participation, with a stated desire to continue developing the RSS format and resolve ambiguity. In June 2007, the board revised their version specification to confirm that namespaces could extend core elements with namespace attributes, as Microsoft does in Internet Explorer 7. In their view, the difference in interpretation of left publishers is uncertain whether this is allowed or prohibited.
See also
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- View Wikipedia: Syndication on how various aspects of Wikipedia can be monitored with RSS or Atom feeds.
- Atom
- The feed icon
- RSS
- Web syndication
- Web services
- Web APIs Feed
- : URI Scheme
- Share icon
- Wikipedia: Syndication
- Usenet
- Facebook News Feed
References
External links
- Deepak Pujari (March 31, 2015). "Read RSS Feeds with PHP".
- Mark Pilgrim (December 18, 2002). "What is RSS?".
- Dave Shea (May 19, 2004). "What is RSS/XML/Atom/Syndication?".
- Oleg Ilin (March 30, 2011). "Why Web Feed?".
- "Sample Streaming News". December 14, 2015.
- Feedicons.com
Source of the article : Wikipedia
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