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[1] document ::= prolog element Misc*
[2] Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]/* any Unicode character, excluding the surrogate blocks, FFFE, and FFFF. */
[3] S ::= (#x20 | #x9 | #xD | #xA)+
[4] NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' | CombiningChar | Extender
[5] Name ::= (Letter | '_' | ':') (NameChar)*
[6] Names ::= Name (#x20 Name)*
[7] Nmtoken ::= (NameChar)+
[8] Nmtokens ::= Nmtoken (#x20 Nmtoken)*
[9] EntityValue ::= '"' ([^%&"] | PEReference | Reference)* '"' | "'" ([^%&'] | PEReference | Reference)* "'"
[10] AttValue ::= '"' ([^<&"] | Reference)* '"' | "'" ([^<&'] | Reference)* "'"
[11] SystemLiteral ::= ('"' [^"]* '"') | ("'" [^']* "'")
[12] PubidLiteral ::= '"' PubidChar* '"' | "'" (PubidChar - "'")* "'"
[13] PubidChar ::= #x20 | #xD | #xA | [a-zA-Z0-9] | [-'()+,./:=?;!*#@$_%]
[14] CharData ::= [^<&]* - ([^<&]* ']]>' [^<&]*)
[15] Comment ::= '<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
[16] PI ::= '<?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>'
[17] PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l'))
[18] CDSect ::= CDStart CData CDEnd
[19] CDStart ::= '<![CDATA['
[20] CData ::= (Char* - (Char* ']]>' Char*))
[21] CDEnd ::= ']]>'
[22] prolog ::= XMLDecl? Misc* (doctypedecl Misc*)?
[23] XMLDecl ::= '<?xml' VersionInfo EncodingDecl? SDDecl? S? '?>'
[24] VersionInfo ::= S 'version' Eq ("'" VersionNum "'" | '"' VersionNum '"')
[25] Eq ::= S? '=' S?
[26] VersionNum ::= '1.0'
[27] Misc ::= Comment | PI | S
[28] doctypedecl ::= '<!DOCTYPE' S Name (S ExternalID)? S? ('[' intSubset ']' S?)? '>'[VC: Root Element Type]
[28a] DeclSep ::= PEReference | S[WFC: PE Between Declarations]
[28b] intSubset ::= (markupdecl | DeclSep)*
[29] markupdecl ::= elementdecl | AttlistDecl | EntityDecl | NotationDecl | PI | Comment[VC: Proper Declaration/PE Nesting]
[30] extSubset ::= TextDecl? extSubsetDecl
[31] extSubsetDecl ::= ( markupdecl | conditionalSect | DeclSep)*
[32] SDDecl ::= S 'standalone' Eq (("'" ('yes' | 'no') "'") | ('"' ('yes' | 'no') '"'))[VC: Standalone Document Declaration]
[39] element ::= EmptyElemTag | STag content ETag[WFC: Element Type Match]
[40] STag ::= '<' Name (S Attribute)* S? '>'[WFC: Unique Att Spec]
[41] Attribute ::= Name Eq AttValue[VC: Attribute Value Type]
[42] ETag ::= '</' Name S? '>'
[43] content ::= CharData? ((element | Reference | CDSect | PI | Comment) CharData?)*
[44] EmptyElemTag ::= '<' Name (S Attribute)* S? '/>'[WFC: Unique Att Spec]
[45] elementdecl ::= '<!ELEMENT' S Name S contentspec S? '>'[VC: Unique Element Type Declaration]
[46] contentspec ::= 'EMPTY' | 'ANY' | Mixed | children
[47] children ::= (choice | seq) ('?' | '*' | '+')?
[48] cp ::= (Name | choice | seq) ('?' | '*' | '+')?
[49] choice ::= '(' S? cp ( S? '|' S? cp )+ S? ')'[VC: Proper Group/PE Nesting]
[50] seq ::= '(' S? cp ( S? ',' S? cp )* S? ')'[VC: Proper Group/PE Nesting]
[51] Mixed ::= '(' S? '#PCDATA' (S? '|' S? Name)* S? ')*' | '(' S? '#PCDATA' S? ')'[VC: Proper Group/PE Nesting]
[52] AttlistDecl ::= '<!ATTLIST' S Name AttDef* S? '>'
[53] AttDef ::= S Name S AttType S DefaultDecl
[54] AttType ::= StringType | TokenizedType | EnumeratedType
[55] StringType ::= 'CDATA'
[56] TokenizedType ::= 'ID'[VC: ID]
[57] EnumeratedType ::= NotationType | Enumeration
[58] NotationType ::= 'NOTATION' S '(' S? Name (S? '|' S? Name)* S? ')'[VC: Notation Attributes]
[59] Enumeration ::= '(' S? Nmtoken (S? '|' S? Nmtoken)* S? ')'[VC: Enumeration]
[60] DefaultDecl ::= '#REQUIRED' | '#IMPLIED' | (('#FIXED' S)? AttValue)[VC: Required Attribute]
[61] conditionalSect ::= includeSect | ignoreSect
[62] includeSect ::= '<![' S? 'INCLUDE' S? '[' extSubsetDecl ']]>'[VC: Proper Conditional Section/PE Nesting]
[63] ignoreSect ::= '<![' S? 'IGNORE' S? '[' ignoreSectContents* ']]>'[VC: Proper Conditional Section/PE Nesting]
[64] ignoreSectContents ::= Ignore ('<![' ignoreSectContents ']]>' Ignore)*
[65] Ignore ::= Char* - (Char* ('<![' | ']]>') Char*)
[66] CharRef ::= '&#' [0-9]+ ';' | '&#x' [0-9a-fA-F]+ ';'[WFC: Legal Character]
[67] Reference ::= EntityRef | CharRef
[68] EntityRef ::= '&' Name ';'[WFC: Entity Declared]
[69] PEReference ::= '%' Name ';'[VC: Entity Declared]
[70] EntityDecl ::= GEDecl | PEDecl
[71] GEDecl ::= '<!ENTITY' S Name S EntityDef S? '>'
[72] PEDecl ::= '<!ENTITY' S '%' S Name S PEDef S? '>'
[73] EntityDef ::= EntityValue | (ExternalID NDataDecl?)
[74] PEDef ::= EntityValue | ExternalID
[75] ExternalID ::= 'SYSTEM' S SystemLiteral | 'PUBLIC' S PubidLiteral S SystemLiteral
[76] NDataDecl ::= S 'NDATA' S Name[VC: Notation Declared]
[77] TextDecl ::= '<?xml' VersionInfo? EncodingDecl S? '?>'
[78] extParsedEnt ::= TextDecl? content
[80] EncodingDecl ::= S 'encoding' Eq ('"' EncName '"' | "'" EncName "'" )
[81] EncName ::= [A-Za-z] ([A-Za-z0-9._] | '-')*/* Encoding name contains only Latin characters */
[82] NotationDecl ::= '<!NOTATION' S Name S (ExternalID | PublicID) S? '>'[VC: Unique Notation Name]
[83] PublicID ::= 'PUBLIC' S PubidLiteral
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