Browsable Atom Grammar

Grammar extracted by Vadim Zaytsev, see the Grammar Zoo entry for details: markup/textual/atom/dettrick/extracted
Source used for this grammar: Tim Dettrick, RELAX NG XML Syntax Grammar for the Atom Format Specification Version 11, Converted from Relax NG Compact Syntax Grammar, as seen in RFC 4287, 2013-01-24 04:06:41 [GitHubGist]

Summary

• Total 42 production rules with 48 top alternatives and 373 symbols.
• Vocabulary: 81 = 42 nonterminals + 3 terminals + 36 labels + 0 markers.
• Total 42 nonterminal symbols: 42 defined (atomCommonAttributes, atomPlainTextConstruct, atomXHTMLTextConstruct, atomTextConstruct, atomPersonConstruct, atomDateConstruct, atomFeed, atomEntry, atomInlineTextContent, atomInlineXHTMLContent, atomInlineOtherContent, atomOutOfLineContent, atomContent, atomAuthor, atomCategory, atomContributor, atomGenerator, atomIcon, atomId, atomLogo, atomLink, atomPublished, atomRights, atomSource, atomSubtitle, atomSummary, atomTitle, atomUpdated, atomNCName, atomMediaType, atomLanguageTag, atomUri, atomEmailAddress, simpleExtensionElement, structuredExtensionElement, extensionElement, undefinedAttribute, undefinedContent, anyElement, anyForeignElement, anyXHTML, xhtmlDiv), 2 root (atomFeed, atomEntry), 0 top (—), 0 bottom (—).
• Total 3 terminal symbols: 3 keywords ("text" ², "html" ², "xhtml" ²), 0 letters (—), 0 numerics (—), 0 signs (—).
• Total 36 labels: [xml:base], [xml:lang], [type] ⁷, [atom:name], [atom:uri], [atom:email], [atom:feed], [atom:entry], [atom:content] ⁴, [src], [atom:author], [term], [scheme], [label], [atom:category], [atom:contributor], [uri], [version], [atom:generator], [atom:icon], [atom:id], [atom:logo], [href], [rel], [hreflang], [title], [length], [atom:link], [atom:published], [atom:rights], [atom:source], [atom:subtitle], [atom:summary], [atom:title], [atom:updated], [xhtml:div].

Syntax

atomCommonAttributes ::=
	[xml:base]::atomUri? [xml:lang]::atomLanguageTag? undefinedAttribute*

atomPlainTextConstruct ::=
	atomCommonAttributes [type]::("text" | "html")? string

atomXHTMLTextConstruct ::=
	atomCommonAttributes [type]::"xhtml" xhtmlDiv

atomTextConstruct ::=
	atomPlainTextConstruct
	atomXHTMLTextConstruct

atomPersonConstruct ::=
	atomCommonAttributes [atom:name]::string [atom:uri]::atomUri? [atom:email]::atomEmailAddress? extensionElement*

atomDateConstruct ::=
	atomCommonAttributes string

atomFeed ::=
	[atom:feed]::(atomCommonAttributes atomAuthor* atomCategory* atomContributor* atomGenerator? atomIcon? atomId atomLink* atomLogo? atomRights? atomSubtitle? atomTitle atomUpdated extensionElement* atomEntry*)

atomEntry ::=
	[atom:entry]::(atomCommonAttributes atomAuthor* atomCategory* atomContent? atomContributor* atomId atomLink* atomPublished? atomRights? atomSource? atomSummary? atomTitle atomUpdated extensionElement*)

atomInlineTextContent ::=
	[atom:content]::(atomCommonAttributes [type]::("text" | "html")? string*)

atomInlineXHTMLContent ::=
	[atom:content]::(atomCommonAttributes [type]::"xhtml" xhtmlDiv)

atomInlineOtherContent ::=
	[atom:content]::(atomCommonAttributes [type]::atomMediaType? (string | anyElement)*)

atomOutOfLineContent ::=
	[atom:content]::(atomCommonAttributes [type]::atomMediaType? [src]::atomUri)

atomContent ::=
	atomInlineTextContent
	atomInlineXHTMLContent
	atomInlineOtherContent
	atomOutOfLineContent

atomAuthor ::=
	[atom:author]::atomPersonConstruct

atomCategory ::=
	[atom:category]::(atomCommonAttributes [term]::string [scheme]::atomUri? [label]::string? undefinedContent)

atomContributor ::=
	[atom:contributor]::atomPersonConstruct

atomGenerator ::=
	[atom:generator]::(atomCommonAttributes [uri]::atomUri? [version]::string? string)

atomIcon ::=
	[atom:icon]::(atomCommonAttributes atomUri)

atomId ::=
	[atom:id]::(atomCommonAttributes atomUri)

atomLogo ::=
	[atom:logo]::(atomCommonAttributes atomUri)

atomLink ::=
	[atom:link]::(atomCommonAttributes [href]::atomUri [rel]::(atomNCName | atomUri)? [type]::atomMediaType? [hreflang]::atomLanguageTag? [title]::string? [length]::string? undefinedContent)

atomPublished ::=
	[atom:published]::atomDateConstruct

atomRights ::=
	[atom:rights]::atomTextConstruct

atomSource ::=
	[atom:source]::(atomCommonAttributes atomAuthor* atomCategory* atomContributor* atomGenerator? atomIcon? atomId? atomLink* atomLogo? atomRights? atomSubtitle? atomTitle? atomUpdated? extensionElement*)

atomSubtitle ::=
	[atom:subtitle]::atomTextConstruct

atomSummary ::=
	[atom:summary]::atomTextConstruct

atomTitle ::=
	[atom:title]::atomTextConstruct

atomUpdated ::=
	[atom:updated]::atomDateConstruct

atomNCName ::=
	string

atomMediaType ::=
	string

atomLanguageTag ::=
	string

atomUri ::=
	string

atomEmailAddress ::=
	string

simpleExtensionElement ::=
	string

structuredExtensionElement ::=
	α+ (string | anyElement)*
	α* string? anyElement+ (string | anyElement)*

extensionElement ::=
	simpleExtensionElement
	structuredExtensionElement

undefinedAttribute ::=
	α

undefinedContent ::=
	(string | anyForeignElement)*

anyElement ::=
	(α | string | anyElement)*

anyForeignElement ::=
	(α | string | anyElement)*

anyXHTML ::=
	(α | string | anyXHTML)*

xhtmlDiv ::=
	[xhtml:div]::(α | string | anyXHTML)*

Maintained by Dr. Vadim Zaytsev a.k.a. @grammarware. Last updated in September 2015. [↑]