default namespace = "http://www.w3.org/2005/Atom"
namespace local = ""
namespace atom = "http://www.w3.org/2005/Atom"
namespace xsd = "http://www/w3/org/2001/XMLSchema-datatypes"
namespace xhtml = "http://www.w3.org/1999/xhtml"
namespace xml = "http://www.w3.org/XML/1998/namespace"
anyNode = element * { ( attribute * text )*, anyNode* } | text
author = element author person
category = element category { attribute term text & ( attribute scheme uri )? & ( attribute label text )? & ( extension+ )? & common }
common = ( attribute xml:base uri )? & ( attribute xml:lang languageTag )? & ( undefinedAttribute+ )?
content = element content { common, ( attribute type "text", text ) | ( attribute type "html", text ) | ( attribute type "xhtml", divXHTML ) | ( mediaType?, attribute src uri, empty ) | ( mediaType?, text | anyNode ) }
contributor = element contributor person
dateConstruct = common, xsd:datetime
divXHTML = element xhtml:div { ( attribute * text )*, xhtmlNode* | text }
emailAddress = xsd:string { pattern = ".+@.+" }
entry = element entry { ( author+ )? & ( category+ )? & content? & ( contributor+ )? & id & ( link+ )? & ( element published dateConstruct )? & ( element rights textConstruct )? & source? & ( element summary textConstruct )? & element title textConstruct & element updated dateConstruct & ( extension+ )? & common }
extension = element * - atom:* { ( attribute * text )*, anyNode* }
feed = element feed { ( author+ )? & ( category+ )? & ( contributor+ )? & generator? & icon? & id & ( link+ )? & logo? & ( element rights textConstruct )? & ( element subtitle textConstruct )? & element title textConstruct & element updated dateConstruct & ( extension+ )? & ( entry+ )? & common }
generator = element generator { ( attribute uri uri )? & ( attribute version text )? & common & text }
icon = element icon { common, uri }
id = element id { common, uri }
languageTag = xsd:string { pattern = "[A-Za-z]{1,8}(-[A-Za-z0-9]{1,8})*" }
link = element link { attribute href uri & ( attribute rel { relName | uri } )? & ( attribute type { xsd:string { pattern = ".+/.+" } } )? & ( attribute hreflang languageTag )? & ( attribute title text )? & ( attribute length text )? & ( extension+ )? & common }
logo = element logo { common, uri }
mediaType = xsd:string { pattern = ".+/.+" }
person = element name text & ( element uri uri )? & ( element email emailAddress )? & ( extension+ )? & common
relName = xsd:string { minLength = "1" pattern = "[^: ]*" }
source = element source { ( author+ )? & ( category+ )? & ( contributor+ )? & generator? & icon? & id? & ( link+ )? & logo? & ( element rights textConstruct )? & ( element subtitle textConstruct )? & ( element title textConstruct )? & ( element updated dateConstruct )? & ( extension+ )? & common }
textConstruct = ( attribute type "html", common, text ) | ( attribute type "xhtml", common, text ) | ( ( attribute type "text" )?, common, text )
undefinedAttribute = attribute * - (xml:base | xml:lang | local:*) text
uri = text
xhtmlNode = element xhtml:* { ( attribute * text )*, xhtmlNode* } | text