book

Content Syndication with RSS

by Ben Hammersley

March 2003

Intermediate to advanced

224 pages

6h 27m

English

O'Reilly Media, Inc.

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Audience
What Is Content Syndication?
HotSauce: MCF and RDFChannel Definition FormatRSS First AppearsThe Standards EvolveThe First ForkThe Second ForkFuture DevelopmentsDesktop HeadlinesRegistries, Aggregators, and Search EnginesCorporate IntranetsRSS on Other Platforms

Information Flow and Other Metaphors
Consuming the Feed
RSS 0.91The Specification in Summary
The Specification in Summary
The Specification in Summary
The Specification in Summary
RSS 0.91The Basic StructureRequired channel SubelementsOptional channel Subelementsitem ElementsSpecial Notes for RSS 0.91
Changes to Existing ElementsNew Elements to RSS 0.92
Creating RSS with Perl Using XML::RSSCreating an RSS feed with the Google SOAP API
Publish a LinkRegistering with AggregatorsMetadata for the Main Page
Metadata in RSS 0.9xUsing URIs in RSS
Resources, PropertyTypes, and PropertiesNodes and ArcsFitting RDF with RSS
The Root Element<element rdf:about="URI OF ELEMENT"><element rdf:resource="URI” />RDF Containersrdf:Bagrdf:Seqrdf:Alt
Walking Through an RSS 1.0 document
The Basic StructureThe Root Element<channel rdf:about=""> (a Subelement of rdf:RDF)Required subelements of channel<image rdf:resource=""> (a Subelement of rdf:RDF)<textinput rdf:about=""> (a Subelement of rdf:RDF)<item rdf:about=""> (a Subelement of rdf:RDF)
Creating RSS 1.0 with PerlCreating RSS Feeds from Amazon.com’s Web ServiceXML to data to RSS
Module Status
The Specification in DetailWhen a guid Is Not a GUIDChanges from RSS 0.92
BlogChannel Module
Using RSS Feeds Inside Another SiteParsing RSS as Simply as PossibleXML parsersRegular Expressions
Transforming RSS with XSLTClient-Side InclusionServer-Side InclusionEnabling server-side includes within Apache 1.3.xServer-side includes with Microsoft IIS
Directories: Introducing Syndic8Registering Your Feed with Syndic8Using Syndic8Syndic8 API
The Meerkat API
A Little HistoryCommon FeaturesAutomatic subscribingBlogrolls and subscription listsOutline Processor Markup Language (OPML)
Namespaces and Modules with RSS 2.0Differences from RSS 1.0
What Do We Know?Can We Express This Data Already?Putting the New Elements to Work with RSS 2.0Putting the New Elements to Work with RSS 1.0Documentation
Installing AmphetaDeskindex.html
Introducing Publish and SubscribePublish and Subscribe Within RSS 0.92 and 2.0Publish and Subscribe with RSS 1.0
LinkpimpListener.pl
What Is XML?
Elements and AttributesName SyntaxWell-FormednessCommentsEntity ReferencesCharacter ReferencesCharacter EncodingsUnicode encoding schemesOther character encodingsValidityDocument Type Definitions (DTDs)Putting It TogetherXML Namespaces
Selecting a ParserXSLT Processors
Specification Documents

Content preview from Content Syndication with RSS

Name

mod_rss091

Synopsis

The mod_rss091 module is designed to give RSS 1.0 “sideways compatibility” with RSS 0.91. Because the three core subelements of the item element are the same in both standards, including mod_rss091 elements in your RSS 1.0 feed allows for dynamic downgrading of the feed for parsers that can’t be bothered with all the RDF stuff. Because the data is rather simple and mostly static, including this module within your RSS 1.0 feed is straightforward. With this in mind, it’s worth doing.

Namespace

The prefix for this module is the self-explanatory rss091:, and the module is represented by the URI http://purl.org/rss/1.0/modules/rss091#. Hence:

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" 
         xmlns="http://purl.org/rss/1.0/"
         xmlns:rss091="http://purl.org/rss/1.0/modules/rss091/"
>

Elements

The mod_rss091 elements represent the same elements within RSS 0.91. Chapter 4 provides details on each of those elements.

Subelements of channel

rss091:language: The language of the feed.
rss091:rating: The PICS rating of the feed.
rss091:managingEditor: The managing editor of the feed.
rss091:webmaster: The webmaster of the feed.
rss091:pubDate: The publication date of the feed.
rss091:lastBuildDate: The date of the feed’s last build.
rss091:copyright: The copyright notice of the feed.
rss091:skipHours rdf:parseType="Literal": The skipHours element, with correct RDF syntax.
rss091:hour: The hours, in GMT, during which the feed should not be retrieved.
rss091:skipDays ...