rss20规范(英文原版)

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1、RSS2.0SpecificationTuesday,July15,2003Contents•WhatisRSS?•Samplefiles•Aboutthisdocument•Requiredchannelelements•Optionalchannelelements•Elementsof•Comments•ExtendingRSS•Roadmap•LicenseandauthorshipWhatisRSS?«RSSisaWebcontentsyndicationformat・ItsnameisanacronymforReallySim

2、pleSyndication・RSSisadialectofXML.AllRSSfilesmustconformtotheXML1.0specification,aspublishedontheWorldWideWebConsortium(W3C)website・AsummaryofRSSversionhistory.Atthetoplevel,aRSSdocumentisaelement,withamandatoryattributecalledversion,thatspecifiestheversionofRSSthatthedocu

3、mentconformsto.Ifitconformstothisspecification,theversionattributemustbe2.0.Subordinatetotheelementisasingleelement,whichcontainsinformationaboutthechannel(metadata)anditscontents.SamplefilesHerearesamplefilesfor:RSS0.91,0.92and2.0.Notethatthesamplefilesmaypointto

4、documentsandservicesthatnoIongerexist・The0.91samplewascreatedwhenthe0.91docswerewritten.Maintainingatrailofsamplesseemslikeagoodidea・AboutthisdocumentThisdocumentrepresentsthestatusofRSSasoftheFallof2002,version2.0.1.Itincorporatesallchangesandadditions,startingwiththebasicspec

5、forRSS0.91(June2000)andincludesnewfeaturesintroducedinRSS0.92(December2000)andRSS0.94(August2002)・Changenotesarehere・Firstwedocumenttherequiredandoptionalsub-elementsof;andthendocumentthesub-elementsof

6、dmapforfutureevolution,andguidelinesforextendingRSS・RequiredchannelelementsHerefsalistoftherequiredchannelelements,eachwithabriefdescription,anexample,andwhereavailable,apointertoamorecompletedescription.ElementDescriptionExampletitleThenameofthechannel.It'showpeoplerefertoyour

7、service・IfyouhaveanHTMLwebsitethatcontainsthesameinformationasyourRSSfile,thetitleofyourchannelshouldbethesameasthetitleofyourwebsite・Gollpstate.comNewsHeadlineslinkTheURLtotheHTMLwebsitecorrespondingtothechannel.http://www.goupstate.com/descriptionPhraseorsentencedescribingthe

8、channel.ThelatestnewsfromGoUpstate.com,aSpartanburgHer