Commit 728df3d9 authored by Vinicius Jose Latorre's avatar Vinicius Jose Latorre
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Parser for DTD (Data Type Definition for XML).

parent ab19c39b
;;; ebnf-dtd.el --- parser for DTD (Data Type Description for XML)
;; Copyright (C) 2004 Free Sofware Foundation, Inc.
;; Author: Vinicius Jose Latorre <viniciusjl@ig.com.br>
;; Maintainer: Vinicius Jose Latorre <viniciusjl@ig.com.br>
;; Time-stamp: <2004/04/04 21:50:16 vinicius>
;; Keywords: wp, ebnf, PostScript
;; Version: 1.0
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;
;; This is part of ebnf2ps package.
;;
;; This package defines a parser for DTD (Data Type Description for XML).
;;
;; See ebnf2ps.el for documentation.
;;
;;
;; DTD Syntax
;; ----------
;;
;; See the URLs:
;; `http://www.w3.org/TR/2004/REC-xml-20040204/'
;; (Extensible Markup Language (XML) 1.0 (Third Edition))
;; `http://www.w3.org/TR/html40/'
;; (HTML 4.01 Specification)
;; `http://www.w3.org/TR/NOTE-html-970421'
;; (HTML DTD with support for Style Sheets)
;;
;;
;; /* Document */
;;
;; document ::= prolog element Misc*
;; /* Note that *only* the prolog will be parsed */
;;
;;
;; /* Characters */
;;
;; Char ::= #x9 | #xA | #xD
;; | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
;; /* any Unicode character, excluding the surrogate blocks, FFFE, and FFFF. */
;;
;; /* NOTE:
;;
;; Document authors are encouraged to avoid "compatibility characters", as
;; defined in section 6.8 of [Unicode] (see also D21 in section 3.6 of
;; [Unicode3]). The characters defined in the following ranges are also
;; discouraged. They are either control characters or permanently undefined
;; Unicode characters:
;;
;; [#x7F-#x84], [#x86-#x9F], [#xFDD0-#xFDDF],
;; [#1FFFE-#x1FFFF], [#2FFFE-#x2FFFF], [#3FFFE-#x3FFFF],
;; [#4FFFE-#x4FFFF], [#5FFFE-#x5FFFF], [#6FFFE-#x6FFFF],
;; [#7FFFE-#x7FFFF], [#8FFFE-#x8FFFF], [#9FFFE-#x9FFFF],
;; [#AFFFE-#xAFFFF], [#BFFFE-#xBFFFF], [#CFFFE-#xCFFFF],
;; [#DFFFE-#xDFFFF], [#EFFFE-#xEFFFF], [#FFFFE-#xFFFFF],
;; [#10FFFE-#x10FFFF]. */
;;
;;
;; /* White Space */
;;
;; S ::= (#x20 | #x9 | #xD | #xA)+
;;
;;
;; /* Names and Tokens */
;;
;; NameChar ::= Letter | Digit | '.' | '-' | '_' | ':'
;; | CombiningChar | Extender
;;
;; Name ::= (Letter | '_' | ':') (NameChar)*
;;
;; Names ::= Name (#x20 Name)*
;;
;; Nmtoken ::= (NameChar)+
;;
;; Nmtokens ::= Nmtoken (#x20 Nmtoken)*
;;
;;
;; /* Literals */
;;
;; EntityValue ::= '"' ([^%&"] | PEReference | Reference)* '"'
;; | "'" ([^%&'] | PEReference | Reference)* "'"
;;
;; AttValue ::= '"' ([^<&"] | Reference)* '"'
;; | "'" ([^<&'] | Reference)* "'"
;;
;; SystemLiteral ::= ('"' [^"]* '"')
;; | ("'" [^']* "'")
;;
;; PubidLiteral ::= '"' PubidChar* '"'
;; | "'" (PubidChar - "'")* "'"
;;
;; PubidChar ::= #x20 | #xD | #xA | [a-zA-Z0-9] | [-'()+,./:=?;!*#@$_%]
;;
;; /* NOTE:
;;
;; Although the EntityValue production allows the definition of a general
;; entity consisting of a single explicit < in the literal (e.g., <!ENTITY
;; mylt "<">), it is strongly advised to avoid this practice since any
;; reference to that entity will cause a well-formedness error. */
;;
;;
;; /* Character Data */
;;
;; CharData ::= [^<&]* - ([^<&]* ']]>' [^<&]*)
;;
;;
;; /* Comments */
;;
;; Comment ::= '<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
;;
;;
;; /* Processing Instructions */
;;
;; PI ::= '<?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>'
;;
;; PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l'))
;;
;;
;; /* CDATA Sections */
;;
;; CDSect ::= CDStart CData CDEnd
;;
;; CDStart ::= '<![CDATA['
;;
;; CData ::= (Char* - (Char* ']]>' Char*))
;;
;; CDEnd ::= ']]>'
;;
;;
;; /* Prolog */
;;
;; prolog ::= XMLDecl? Misc* (doctypedecl Misc*)?
;;
;; XMLDecl ::= '<?xml' VersionInfo EncodingDecl? SDDecl? S? '?>'
;;
;; VersionInfo ::= S 'version' Eq ("'" VersionNum "'" | '"' VersionNum '"')
;;
;; Eq ::= S? '=' S?
;;
;; VersionNum ::= '1.0'
;;
;; Misc ::= Comment | PI | S
;;
;;
;; /* Document Type Definition */
;;
;; doctypedecl ::= '<!DOCTYPE' S Name (S ExternalID)? S?
;; ('[' intSubset ']' S?)? '>'
;; [VC: Root Element Type]
;; [WFC: External Subset]
;;
;; DeclSep ::= PEReference | S
;; [WFC: PE Between Declarations]
;;
;; intSubset ::= (markupdecl | DeclSep)*
;;
;; markupdecl ::= elementdecl | AttlistDecl | EntityDecl
;; | NotationDecl | PI | Comment
;; [VC: Proper Declaration/PE Nesting]
;; [WFC: PEs in Internal Subset]
;;
;;
;; /* External Subset */
;;
;; extSubset ::= TextDecl? extSubsetDecl
;;
;; extSubsetDecl ::= ( markupdecl | conditionalSect | DeclSep)*
;;
;;
;; /* Standalone Document Declaration */
;;
;; SDDecl ::= S 'standalone' Eq
;; (("'" ('yes' | 'no') "'") | ('"' ('yes' | 'no') '"'))
;; [VC: Standalone Document Declaration]
;;
;;
;; /* Element */
;;
;; element ::= EmptyElemTag | STag content ETag
;; [WFC: Element Type Match]
;; [VC: Element Valid]
;;
;;
;; /* Start-tag */
;;
;; STag ::= '<' Name (S Attribute)* S? '>'
;; [WFC: Unique Att Spec]
;;
;; Attribute ::= Name Eq AttValue
;; [VC: Attribute Value Type]
;; [WFC: No External Entity References]
;; [WFC: No < in Attribute Values]
;;
;;
;; /* End-tag */
;;
;; ETag ::= '</' Name S? '>'
;;
;;
;; /* Content of Elements */
;;
;; content ::= CharData?
;; ((element | Reference | CDSect | PI | Comment) CharData?)*
;;
;;
;; /* Tags for Empty Elements */
;;
;; EmptyElemTag ::= '<' Name (S Attribute)* S? '/>'
;; [WFC: Unique Att Spec]
;;
;;
;; /* Element Type Declaration */
;;
;; elementdecl ::= '<!ELEMENT' S Name S contentspec S? '>'
;; [VC: Unique Element Type Declaration]
;;
;; contentspec ::= 'EMPTY' | 'ANY' | Mixed | children
;;
;;
;; /* Element-content Models */
;;
;; children ::= (choice | seq) ('?' | '*' | '+')?
;;
;; cp ::= (Name | choice | seq) ('?' | '*' | '+')?
;;
;; choice ::= '(' S? cp ( S? '|' S? cp )+ S? ')'
;; [VC: Proper Group/PE Nesting]
;;
;; seq ::= '(' S? cp ( S? ',' S? cp )* S? ')'
;; [VC: Proper Group/PE Nesting]
;;
;;
;; /* Mixed-content Declaration */
;;
;; Mixed ::= '(' S? '#PCDATA' (S? '|' S? Name)* S? ')*'
;; | '(' S? '#PCDATA' S? ')'
;; [VC: Proper Group/PE Nesting]
;; [VC: No Duplicate Types]
;;
;;
;; /* Attribute-list Declaration */
;;
;; AttlistDecl ::= '<!ATTLIST' S Name AttDef* S? '>'
;;
;; AttDef ::= S Name S AttType S DefaultDecl
;;
;;
;; /* Attribute Types */
;;
;; AttType ::= StringType | TokenizedType | EnumeratedType
;;
;; StringType ::= 'CDATA'
;;
;; TokenizedType ::= 'ID' [VC: ID]
;; [VC: One ID per Element Type]
;; [VC: ID Attribute Default]
;; | 'IDREF' [VC: IDREF]
;; | 'IDREFS' [VC: IDREF]
;; | 'ENTITY' [VC: Entity Name]
;; | 'ENTITIES' [VC: Entity Name]
;; | 'NMTOKEN' [VC: Name Token]
;; | 'NMTOKENS' [VC: Name Token]
;;
;;
;; /* Enumerated Attribute Types */
;;
;; EnumeratedType ::= NotationType | Enumeration
;;
;; NotationType ::= 'NOTATION' S '(' S? Name (S? '|' S? Name)* S? ')'
;; [VC: Notation Attributes]
;; [VC: One Notation Per Element Type]
;; [VC: No Notation on Empty Element]
;; [VC: No Duplicate Tokens]
;;
;; Enumeration ::= '(' S? Nmtoken (S? '|' S? Nmtoken)* S? ')'
;; [VC: Enumeration]
;; [VC: No Duplicate Tokens]
;;
;;
;; /* Attribute Defaults */
;;
;; DefaultDecl ::= '#REQUIRED' | '#IMPLIED'
;; | (('#FIXED' S)? AttValue)
;; [VC: Required Attribute]
;; [VC: Attribute Default Value Syntactically Correct]
;; [WFC: No < in Attribute Values]
;; [VC: Fixed Attribute Default]
;;
;;
;; /* Conditional Section */
;;
;; conditionalSect ::= includeSect | ignoreSect
;;
;; includeSect ::= '<![' S? 'INCLUDE' S? '[' extSubsetDecl ']]>'
;; [VC: Proper Conditional Section/PE Nesting]
;;
;; ignoreSect ::= '<![' S? 'IGNORE' S? '[' ignoreSectContents* ']]>'
;; [VC: Proper Conditional Section/PE Nesting]
;;
;; ignoreSectContents ::= Ignore ('<![' ignoreSectContents ']]>' Ignore)*
;;
;; Ignore ::= Char* - (Char* ('<![' | ']]>') Char*)
;;
;;
;; /* Character Reference */
;;
;; CharRef ::= '&#' [0-9]+ ';'
;; | '&#x' [0-9a-fA-F]+ ';'
;; [WFC: Legal Character]
;;
;;
;; /* Entity Reference */
;;
;; Reference ::= EntityRef | CharRef
;;
;; EntityRef ::= '&' Name ';'
;; [WFC: Entity Declared]
;; [VC: Entity Declared]
;; [WFC: Parsed Entity]
;; [WFC: No Recursion]
;;
;; PEReference ::= '%' Name ';'
;; [VC: Entity Declared]
;; [WFC: No Recursion]
;; [WFC: In DTD]
;;
;;
;; /* Entity Declaration */
;;
;; EntityDecl ::= GEDecl | PEDecl
;;
;; GEDecl ::= '<!ENTITY' S Name S EntityDef S? '>'
;;
;; PEDecl ::= '<!ENTITY' S '%' S Name S PEDef S? '>'
;;
;; EntityDef ::= EntityValue | (ExternalID NDataDecl?)
;;
;; PEDef ::= EntityValue | ExternalID
;;
;;
;; /* External Entity Declaration */
;;
;; ExternalID ::= 'SYSTEM' S SystemLiteral
;; | 'PUBLIC' S PubidLiteral S SystemLiteral
;;
;; NDataDecl ::= S 'NDATA' S Name
;; [VC: Notation Declared]
;;
;;
;; /* Text Declaration */
;;
;; TextDecl ::= '<?xml' VersionInfo? EncodingDecl S? '?>'
;;
;;
;; /* Well-Formed External Parsed Entity */
;;
;; extParsedEnt ::= TextDecl? content
;;
;;
;; /* Encoding Declaration */
;;
;; EncodingDecl ::= S 'encoding' Eq ('"' EncName '"' | "'" EncName "'" )
;;
;; EncName ::= [A-Za-z] ([A-Za-z0-9._] | '-')*
;; /* Encoding name contains only Latin characters */
;;
;;
;; /* Notation Declarations */
;;
;; NotationDecl ::= '<!NOTATION' S Name S (ExternalID | PublicID) S? '>'
;; [VC: Unique Notation Name]
;;
;; PublicID ::= 'PUBLIC' S PubidLiteral
;;
;;
;; /* Characters */
;;
;; Letter ::= BaseChar | Ideographic
;;
;; BaseChar ::= [#x0041-#x005A] | [#x0061-#x007A] | [#x00C0-#x00D6]
;; | [#x00D8-#x00F6] | [#x00F8-#x00FF] | [#x0100-#x0131]
;; | [#x0134-#x013E] | [#x0141-#x0148] | [#x014A-#x017E]
;; | [#x0180-#x01C3] | [#x01CD-#x01F0] | [#x01F4-#x01F5]
;; | [#x01FA-#x0217] | [#x0250-#x02A8] | [#x02BB-#x02C1]
;; | #x0386 | [#x0388-#x038A] | #x038C
;; | [#x038E-#x03A1] | [#x03A3-#x03CE] | [#x03D0-#x03D6]
;; | #x03DA | #x03DC | #x03DE
;; | #x03E0 | [#x03E2-#x03F3] | [#x0401-#x040C]
;; | [#x040E-#x044F] | [#x0451-#x045C] | [#x045E-#x0481]
;; | [#x0490-#x04C4] | [#x04C7-#x04C8] | [#x04CB-#x04CC]
;; | [#x04D0-#x04EB] | [#x04EE-#x04F5] | [#x04F8-#x04F9]
;; | [#x0531-#x0556] | #x0559 | [#x0561-#x0586]
;; | [#x05D0-#x05EA] | [#x05F0-#x05F2] | [#x0621-#x063A]
;; | [#x0641-#x064A] | [#x0671-#x06B7] | [#x06BA-#x06BE]
;; | [#x06C0-#x06CE] | [#x06D0-#x06D3] | #x06D5
;; | [#x06E5-#x06E6] | [#x0905-#x0939] | #x093D
;; | [#x0958-#x0961] | [#x0985-#x098C] | [#x098F-#x0990]
;; | [#x0993-#x09A8] | [#x09AA-#x09B0] | #x09B2
;; | [#x09B6-#x09B9] | [#x09DC-#x09DD] | [#x09DF-#x09E1]
;; | [#x09F0-#x09F1] | [#x0A05-#x0A0A] | [#x0A0F-#x0A10]
;; | [#x0A13-#x0A28] | [#x0A2A-#x0A30] | [#x0A32-#x0A33]
;; | [#x0A35-#x0A36] | [#x0A38-#x0A39] | [#x0A59-#x0A5C]
;; | #x0A5E | [#x0A72-#x0A74] | [#x0A85-#x0A8B]
;; | #x0A8D | [#x0A8F-#x0A91] | [#x0A93-#x0AA8]
;; | [#x0AAA-#x0AB0] | [#x0AB2-#x0AB3] | [#x0AB5-#x0AB9]
;; | #x0ABD | #x0AE0 | [#x0B05-#x0B0C]
;; | [#x0B0F-#x0B10] | [#x0B13-#x0B28] | [#x0B2A-#x0B30]
;; | [#x0B32-#x0B33] | [#x0B36-#x0B39] | #x0B3D
;; | [#x0B5C-#x0B5D] | [#x0B5F-#x0B61] | [#x0B85-#x0B8A]
;; | [#x0B8E-#x0B90] | [#x0B92-#x0B95] | [#x0B99-#x0B9A]
;; | #x0B9C | [#x0B9E-#x0B9F] | [#x0BA3-#x0BA4]
;; | [#x0BA8-#x0BAA] | [#x0BAE-#x0BB5] | [#x0BB7-#x0BB9]
;; | [#x0C05-#x0C0C] | [#x0C0E-#x0C10] | [#x0C12-#x0C28]
;; | [#x0C2A-#x0C33] | [#x0C35-#x0C39] | [#x0C60-#x0C61]
;; | [#x0C85-#x0C8C] | [#x0C8E-#x0C90] | [#x0C92-#x0CA8]
;; | [#x0CAA-#x0CB3] | [#x0CB5-#x0CB9] | #x0CDE
;; | [#x0CE0-#x0CE1] | [#x0D05-#x0D0C] | [#x0D0E-#x0D10]
;; | [#x0D12-#x0D28] | [#x0D2A-#x0D39] | [#x0D60-#x0D61]
;; | [#x0E01-#x0E2E] | #x0E30 | [#x0E32-#x0E33]
;; | [#x0E40-#x0E45] | [#x0E81-#x0E82] | #x0E84
;; | [#x0E87-#x0E88] | #x0E8A | #x0E8D
;; | [#x0E94-#x0E97] | [#x0E99-#x0E9F] | [#x0EA1-#x0EA3]
;; | #x0EA5 | #x0EA7 | [#x0EAA-#x0EAB]
;; | [#x0EAD-#x0EAE] | #x0EB0 | [#x0EB2-#x0EB3]
;; | #x0EBD | [#x0EC0-#x0EC4] | [#x0F40-#x0F47]
;; | [#x0F49-#x0F69] | [#x10A0-#x10C5] | [#x10D0-#x10F6]
;; | #x1100 | [#x1102-#x1103] | [#x1105-#x1107]
;; | #x1109 | [#x110B-#x110C] | [#x110E-#x1112]
;; | #x113C | #x113E | #x1140
;; | #x114C | #x114E | #x1150
;; | [#x1154-#x1155] | #x1159 | [#x115F-#x1161]
;; | #x1163 | #x1165 | #x1167
;; | #x1169 | [#x116D-#x116E] | [#x1172-#x1173]
;; | #x1175 | #x119E | #x11A8
;; | #x11AB | [#x11AE-#x11AF] | [#x11B7-#x11B8]
;; | #x11BA | [#x11BC-#x11C2] | #x11EB
;; | #x11F0 | #x11F9 | [#x1E00-#x1E9B]
;; | [#x1EA0-#x1EF9] | [#x1F00-#x1F15] | [#x1F18-#x1F1D]
;; | [#x1F20-#x1F45] | [#x1F48-#x1F4D] | [#x1F50-#x1F57]
;; | #x1F59 | #x1F5B | #x1F5D
;; | [#x1F5F-#x1F7D] | [#x1F80-#x1FB4] | [#x1FB6-#x1FBC]
;; | #x1FBE | [#x1FC2-#x1FC4] | [#x1FC6-#x1FCC]
;; | [#x1FD0-#x1FD3] | [#x1FD6-#x1FDB] | [#x1FE0-#x1FEC]
;; | [#x1FF2-#x1FF4] | [#x1FF6-#x1FFC] | #x2126
;; | [#x212A-#x212B] | #x212E | [#x2180-#x2182]
;; | [#x3041-#x3094] | [#x30A1-#x30FA] | [#x3105-#x312C]
;; | [#xAC00-#xD7A3]
;;
;; Ideographic ::= [#x4E00-#x9FA5] | #x3007 | [#x3021-#x3029]
;;
;; CombiningChar ::= [#x0300-#x0345] | [#x0360-#x0361] | [#x0483-#x0486]
;; | [#x0591-#x05A1] | [#x05A3-#x05B9] | [#x05BB-#x05BD]
;; | #x05BF | [#x05C1-#x05C2] | #x05C4
;; | [#x064B-#x0652] | #x0670 | [#x06D6-#x06DC]
;; | [#x06DD-#x06DF] | [#x06E0-#x06E4] | [#x06E7-#x06E8]
;; | [#x06EA-#x06ED] | [#x0901-#x0903] | #x093C
;; | [#x093E-#x094C] | #x094D | [#x0951-#x0954]
;; | [#x0962-#x0963] | [#x0981-#x0983] | #x09BC
;; | #x09BE | #x09BF | [#x09C0-#x09C4]
;; | [#x09C7-#x09C8] | [#x09CB-#x09CD] | #x09D7
;; | [#x09E2-#x09E3] | #x0A02 | #x0A3C
;; | #x0A3E | #x0A3F | [#x0A40-#x0A42]
;; | [#x0A47-#x0A48] | [#x0A4B-#x0A4D] | [#x0A70-#x0A71]
;; | [#x0A81-#x0A83] | #x0ABC | [#x0ABE-#x0AC5]
;; | [#x0AC7-#x0AC9] | [#x0ACB-#x0ACD] | [#x0B01-#x0B03]
;; | #x0B3C | [#x0B3E-#x0B43] | [#x0B47-#x0B48]
;; | [#x0B4B-#x0B4D] | [#x0B56-#x0B57] | [#x0B82-#x0B83]
;; | [#x0BBE-#x0BC2] | [#x0BC6-#x0BC8] | [#x0BCA-#x0BCD]
;; | #x0BD7 | [#x0C01-#x0C03] | [#x0C3E-#x0C44]
;; | [#x0C46-#x0C48] | [#x0C4A-#x0C4D] | [#x0C55-#x0C56]
;; | [#x0C82-#x0C83] | [#x0CBE-#x0CC4] | [#x0CC6-#x0CC8]
;; | [#x0CCA-#x0CCD] | [#x0CD5-#x0CD6] | [#x0D02-#x0D03]
;; | [#x0D3E-#x0D43] | [#x0D46-#x0D48] | [#x0D4A-#x0D4D]
;; | #x0D57 | #x0E31 | [#x0E34-#x0E3A]
;; | [#x0E47-#x0E4E] | #x0EB1 | [#x0EB4-#x0EB9]
;; | [#x0EBB-#x0EBC] | [#x0EC8-#x0ECD] | [#x0F18-#x0F19]
;; | #x0F35 | #x0F37 | #x0F39
;; | #x0F3E | #x0F3F | [#x0F71-#x0F84]
;; | [#x0F86-#x0F8B] | [#x0F90-#x0F95] | #x0F97
;; | [#x0F99-#x0FAD] | [#x0FB1-#x0FB7] | #x0FB9
;; | [#x20D0-#x20DC] | #x20E1 | [#x302A-#x302F]
;; | #x3099 | #x309A
;;
;; Digit ::= [#x0030-#x0039] | [#x0660-#x0669] | [#x06F0-#x06F9]
;; | [#x0966-#x096F] | [#x09E6-#x09EF] | [#x0A66-#x0A6F]
;; | [#x0AE6-#x0AEF] | [#x0B66-#x0B6F] | [#x0BE7-#x0BEF]
;; | [#x0C66-#x0C6F] | [#x0CE6-#x0CEF] | [#x0D66-#x0D6F]
;; | [#x0E50-#x0E59] | [#x0ED0-#x0ED9] | [#x0F20-#x0F29]
;;
;; Extender ::= #x00B7 | #x02D0 | #x02D1 | #x0387 | #x0640 | #x0E46 | #x0EC6
;; | #x3005 | [#x3031-#x3035] | [#x309D-#x309E] | [#x30FC-#x30FE]
;;
;;
;; NOTES
;; -----
;;
;; At moment, only the `<!ELEMENT' generates a syntactic chart. The
;; `<!ATTLIST', `<!NOTATION' and `<!ENTITY' are syntacticly checked but they
;; don't generate a syntactic chart.
;;
;; Besides the syntax above, ebnf-dtd also accepts a `pure' dtd file. An
;; example of a `pure' dtd file is:
;;
;; <?xml version="1.0" encoding="UTF-8"?>
;; <!--
;; The main element.
;; -->
;; <!ELEMENT workflow (registers?, trigger-functions?, initial-actions,
;; steps, splits?, joins?)>
;; <!--
;; An action that can be executed (id must be unique among actions for
;; the enclosing step).
;; Used in: actions
;; -->
;; <!ELEMENT action (restrict-to, validators?, pre-functions?, results,
;; post-functions?)>
;; <!ATTLIST action
;; id CDATA #REQUIRED
;; name CDATA #REQUIRED
;; >
;;
;;
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Code:
(require 'ebnf-otz)
(defvar ebnf-dtd-lex nil
"Value returned by `ebnf-dtd-lex' function.")
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Syntactic analyzer
;;; document ::= prolog element Misc*
;;; /* Note that *only* the prolog will be parsed */
(defun ebnf-dtd-parser (start)
"DTD parser."
(let ((total (+ (- ebnf-limit start) 1))
(bias (1- start))
(origin (point))
rule-list token rule the-end)
(goto-char start)
(setq token (ebnf-dtd-lex))
(and (eq token 'end-of-input)
(error "Empty DTD file"))
(setq token (ebnf-dtd-prolog token))
(unless (eq (car token) 'end-prolog)
(setq the-end (cdr token)
token (car token))
(while (not (eq token the-end))
(ebnf-message-float
"Parsing...%s%%"
(/ (* (- (point) bias) 100.0) total))
(setq token (ebnf-dtd-intsubset token)
rule (cdr token)
token (car token))
(or (null rule)
(ebnf-add-empty-rule-list rule)
(setq rule-list (cons rule rule-list))))
(or (eq the-end 'end-of-input)
(eq (ebnf-dtd-lex) 'end-decl)
(error "Missing end of DOCTYPE"))
;; adjust message, 'cause *only* prolog will be parsed
(ebnf-message-float "Parsing...%s%%" 100.0))
(goto-char origin)
rule-list))
;;; prolog ::= XMLDecl? Misc* (doctypedecl Misc*)?
;;;
;;; XMLDecl ::= '<?xml' VersionInfo EncodingDecl? SDDecl? S? '?>'
;;;
;;; VersionInfo ::= S 'version' Eq ("'" VersionNum "'" | '"' VersionNum '"')
;;;
;;; Eq ::= S? '=' S?
;;;
;;; VersionNum ::= '1.0'
;;;
;;; Misc ::= Comment | PI | S
;;;
;;; EncodingDecl ::= S 'encoding' Eq ('"' EncName '"' | "'" EncName "'" )
;;;
;;; EncName ::= [A-Za-z] ([-A-Za-z0-9._])*
;;; /* Encoding name contains only Latin characters */
;;;
;;; SDDecl ::= S 'standalone' Eq
;;; (("'" ('yes' | 'no') "'") | ('"' ('yes' | 'no') '"'))
;;;
;;; doctypedecl ::= '<!DOCTYPE' S Name (S ExternalID)? S?
;;; ('[' intSubset ']' S?)? '>'
(defun ebnf-dtd-prolog (token)
(when (and (eq token 'begin-pi) (string= ebnf-dtd-lex "xml"))
;; version = "1.0"
(setq token (ebnf-dtd-attribute (ebnf-dtd-lex) 'version-attr
"^1\\.0$" "XML version"))
;; ( encoding = "encoding name" )?
(setq token (ebnf-dtd-attribute-optional
token 'encoding-attr
"^[A-Za-z][-A-Za-z0-9._]*$" "XML encoding"))
;; ( standalone = ( "yes" | "no" ) )?
(setq token (ebnf-dtd-attribute-optional
token 'standalone-attr
"^yes|no$" "XML standalone"))
(or (eq token 'end-pi)
(error "Missing end of XML processing instruction")))
;; processing instructions
(setq token (ebnf-dtd-pi (ebnf-dtd-lex)))
(cond
;; DOCTYPE
((eq token 'doctype-decl)
(or (eq (ebnf-dtd-lex) 'name)
(error "Document type name is missing"))