This document provides information about web feeds and how they allow users to subscribe to frequently updated content from websites. It discusses the differences between RSS and Atom formats for creating feed files in XML. RSS was originally created by Dan Libby and has evolved through different versions. Both RSS and Atom feeds can be accessed using aggregator programs or websites to automatically gather new updates from subscribed feeds. This allows users to be informed of new content without visiting websites individually.

1. Portfóliobibliodigital
FEED: RSS AND ATOM

2. Lesson Plan:
 Web Feed
 Aggregators
 RSS
 Atom

3. Objectives:
 Take the student to understand what is a feed
and its usefulness.
 Students understand the usefulness of due
aggregators.
 To demonstrate the differences between RSS
and ATOM.

4. Web Feed
 Term from the English verb "food.“
 It is a data format used in ways to communicate
with frequently updated content such as websites
(web pages) news or blogs.
 Information distributors, bloggers or news
channels provide a feed in which users can enroll
in the format of a link.
 Other formats as possible to be communicated in
feeds are audio files, podcasts and videos.

5. Aggregators
 Are the services that enable users to subscribe
to different feeds.
 This is a program that gathers information from
different feeds chosen by the user, and
connects periodically or on user command to
check for new updates.
 Several sites are now offering the same
service, eliminating the installation of a
program.

6. Subscribe to a feed
 Means including a link to the feed in your
aggregator's subscription list.

7. Files Feed
 These are lists of updated content from a
particular site, with written specifications based
on XML.
Currently there are three main specifications
for creating feed file:
 RSS 1.0 - RDF Site Summary 1.0 (RSS-DEV).
 RSS 2.0 - Really Simple Syndication 2.0
(Userland).
 Atom (IETF).

8. The versions RSS 1.0 and
RSS 2.0
 Are different organizations have separated
working. This occurred because after the
completion of the study group RSS Netscape
organizations continued to develop separately
from each of the formats, which resulted in two
different versions.
 The Atom specification (RFC-4287) is
published by a single normative body, if the
IETF.

9. Feed Characteristics
 Feeds are used so that an Internet user can follow new
articles and content from a website or blog without needing to
visit the site itself. Whenever new content is published,
subscribe to the feed can read it in your aggregator.
 Subscribe to a feed or unsubscribe processes are made ​in
the aggregator, adding or removing the link to the feed. No
need to send a cancellation email to the distributor
information.
 No need to send an e-mail to the distributor, thus preserving
the account's e-mail user as negative effects of Internet
spam, viruses or identity theft.
 Good aggregators can organize the information to be read in
a personalized manner, collect them or sort them according
to specifications.

10. Operation and Use
 With a program called an aggregator of feeds,
you receive the updates of sites selected
without having to visit them.
 There are already websites that act as
aggregators feeds, show updates in the
browser itself and thus eliminate the
installation of specific software.
 There are also browsers and email clients to
Feed reader added, also without the need for
additional software.

11. Recognition of "Feeds" via web
browser
 Webmasters who place a feed on a site,
commonly add the codes that I will present the
following two slides to indicate to the browser
(browser) user that the page has a feed.

12. If the file was created with Feed RSS
is used to specify the code :
 <link rel="alternate" type="application/rss+xml"
href="feed.rss" title="RSS feed to my Page">
whereas the file name is called Feed feed.rss.

13. Se o arquivo Feed foi criado com a
especificação Atom é utilizado o
código:
 <link rel="alternate"
type="application/atom+xml" href="atom.xml"
title="RSS feed to my Page ">
 Whereas the file name is called the Feed
atom.xml.

14. RSS
 It is a subset of "dialects" that serve to
aggregate XML content or "web syndication",
and can be accessed by programs or
aggregator sites.
 It is mainly used on news sites and blogs.

15. The RSS is the abbreviation
used to refer to the following
standards:
 Rich Site Summary (RSS 0.91)
 RDF Site Summary (RSS 0.9 e 1.0)
 Really Simple Syndication (RSS 2.0)

16.  The technology of RSS allows Internet users
to register themselves on sites that provide
"feeds" RSS.
These are typically sites that change or update
their content regularly.
 To this end, RSS feeds are used to receive
these updates, this way you can stay informed of
various updates on various sites without having
to visit them one by one.

17.  The RSS feeds provide web content or
summaries of content together with links to full
versions of content and other metadata.
 This information is delivered as an XML file
called "RSS feed", "webfeed", "Atom" or RSS
channel.

18.  The beginning and even today in some sites the icon
for the RSS format adopted is
 Along the XML code.
 But the most famous icon that represents the RSS
was adopted by a partnership between the Mozilla
Foundation (makers of Firefox, which has used the
icon) with Microsoft for the latest version of its
browser, Internet Explorer 7. Later Flock, browser
based on Firefox still under development, also
adopted the icon. Helping to promote to the RSS Feed
Icons site users to freely distribute the icon in different
formats for inclusion in websites.

19. Uses of RSS:
 It is widely used by the community of blogs to
share their latest news or full documents or even
multimedia files.
 In 2000, the use of RSS spread to the major news
organizations like Reuters, CNN and the BBC.
These companies allow other websites to
incorporate their news summaries and through
various usage agreements.
 It is now used for many purposes, including
marketing, bug-reports, and any other activity
involving constant updating or publishing content.
Today it is common to find RSS feeds on major
web sites and some small.

20.  One type of program known as "feed reader"
or aggregator can check RSS-enabled pages
for their users and report updates. These
applications are typically constructed as
standalone programs or extensions of Web
browsers or email programs. These programs
are available for various operating systems,
including existing web versions of these
programs.

21.  RSS Readers require no software and bring
the feeds of users to any computer with web
access is available.
 Some aggregators combine RSS feeds and
other feeds. For example, adding several
items relating to football feeds from various
sports and then creating a new football feed.

22.  On web pages RSS feeds are typically
indicated by an orange rectangle with the
letters XML or RSS.
 Written MIME: application / rss + xml

23. How it works:
 Are included in the RSS file information such as title, page (exact
address where there is something new), description of the change,
date, author, etc.., Of all the latest updates of the site to which it is
added. Every few minutes the RSS file is updated showing the
latest changes.
 RSS is a format standardized worldwide, which operates under the
XML (Extensible Markup Language), and is used to share Web
content
 It allows, for example, the administrator of a news site create an
XML file with the latest headlines published in order to share them
quickly with your readers. This file can be read by any tool that is
able to understand the XML format of the RSS.

24.  RDF Site Summary, the first version of RSS was
created by Dan Libby of Netscape in March 1999
for use in the portal "My Netscape". This version
became known as RSS 0.9. In July 1999, in
response to comments and suggestions, Libby
produced a prototype called RSS 0.91 (with RSS
means Rich Site Summary), also simplifying the
format.
 RSS (Really Simple Syndication) is a descendant
of the RDF (Resource Description Framework)
and follows the W3C definitions of RDF, which is a
descendant of XML.

25. Operation and update
 In general, allows receiving fast or news
information synchronized with its content
providers, quickly, since the data format is
limited to plain text.
 Serves to receive a list of updates of the sites
chosen, when they occur. Widely used on
news sites, sites for weather, traffic
information, economic information, and blogs.
Gmail (Google Mail Service) also uses RSS as
a mechanism. RSS feeds can be found in
directories such as www.rssfeeds.com.br

26. RSS Readers
 To make use of RSS, there are two
schemes:
 1º to use a client program also called an
aggregator. In it are included in the RSS that
you want to track
 2º make a record on specific sites and include
them you want to track RSS. They are
aggregators via browser or browser. Add RSS
remotely.

27.  Most browsers already has the ability to add
RSS in the software itself. Usually do not have
as many features as other aggregators
available.

28. Atom
 Unlike the RSS, Atom is not an acronym, but it is also
a format for reading and writing information on the
Web
Some say that this project is an initial proposal for
unification of RSS 1.0 and RSS 2.0.
 It is also based on XML, but its development is seen
as more sophisticated.
 The group that works on it even has the support of
major corporations such as Google.

29. What is ATOM
 It is the name given to a style based on XML
content and metadata, ie, is an application-
level protocol for publishing and editing web
sources that are updated regularly, such as
Blogs.
 Feeds must be formed in XML format and are
identified as application / atom + xml media
type.
The operation does not differ from their
traditional Markup Languages​​, with headers,
titles and body as in HTML 4.0.

30. THANK YOU
FOR YOUR ATTENTION