--- /dev/null
+;;; 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.")
+
+\f
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; 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"))
+ (cons (if (eq (ebnf-dtd-externalid) 'begin-subset)
+ (ebnf-dtd-lex)
+ 'end-prolog)
+ 'end-subset))
+ ((memq token '(element-decl attlist-decl entity-decl notation-decl))
+ (cons token 'end-of-input))
+ (t
+ '(end-prolog . end-subset))
+ ))
+
+
+(defun ebnf-dtd-attribute (token attr match attr-name)
+ (or (eq token attr)
+ (error "%s attribute is missing" attr-name))
+ (ebnf-dtd-attribute-optional token attr match attr-name))
+
+
+(defun ebnf-dtd-attribute-optional (token attr match attr-name)
+ (when (eq token attr)
+ (or (and (eq (ebnf-dtd-lex) 'equal)
+ (eq (ebnf-dtd-lex) 'string)
+ (string-match match ebnf-dtd-lex))
+ (error "XML %s attribute is invalid" attr-name))
+ (setq token (ebnf-dtd-lex)))
+ token)
+
+
+;;; ExternalID ::= 'SYSTEM' S SystemLiteral
+;;; | 'PUBLIC' S PubidLiteral S SystemLiteral
+
+
+(defun ebnf-dtd-externalid (&optional token)
+ (let ((must-have token))
+ (or token (setq token (ebnf-dtd-lex)))
+ (cond ((eq token 'system)
+ (ebnf-dtd-systemliteral))
+ ((eq token 'public)
+ (ebnf-dtd-pubidliteral)
+ (ebnf-dtd-systemliteral))
+ (must-have
+ (error "Missing `SYSTEM' or `PUBLIC' in external id"))
+ (t
+ token))))
+
+
+;;; SystemLiteral ::= ('"' [^"]* '"')
+;;; | ("'" [^']* "'")
+
+
+(defun ebnf-dtd-systemliteral ()
+ (or (eq (ebnf-dtd-lex) 'string)
+ (error "System identifier is invalid"))
+ (ebnf-dtd-lex))
+
+
+;;; PubidLiteral ::= '"' PubidChar* '"'
+;;; | "'" (PubidChar - "'")* "'"
+;;;
+;;; PubidChar ::= [-'()+,./:=?;!*#@$_%\n\r a-zA-Z0-9]
+
+
+(defun ebnf-dtd-pubidliteral ()
+ (or (and (eq (ebnf-dtd-lex) 'string)
+ (string-match "^[-'()+,./:=?;!*#@$_%\n\r a-zA-Z0-9]*$"
+ ebnf-dtd-lex))
+ (error "Public identifier is invalid")))
+
+
+;;; PI ::= '<?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>'
+;;;
+;;; PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l'))
+
+
+(defun ebnf-dtd-pi (token)
+ (while (eq token 'begin-pi)
+ (and (string-match "^[xX][mM][lL]$" ebnf-dtd-lex)
+ (error "Processing instruction name can not be `XML'"))
+ (while (not (eq (ebnf-dtd-lex) 'end-pi)))
+ (setq token (ebnf-dtd-lex)))
+ token)
+
+
+;;; doctypedecl ::= '<!DOCTYPE' S Name (S ExternalID)? S?
+;;; ('[' intSubset ']' S?)? '>'
+;;;
+;;; intSubset ::= (markupdecl | DeclSep)*
+;;;
+;;; DeclSep ::= PEReference | S
+;;;
+;;; markupdecl ::= elementdecl | AttlistDecl | EntityDecl
+;;; | NotationDecl | PI | Comment
+
+
+(defun ebnf-dtd-intsubset (token)
+ ;; PI - Processing Instruction
+ (and (eq token 'begin-pi)
+ (setq token (ebnf-dtd-pi token)))
+ (cond
+ ((memq token '(end-subset end-of-input))
+ (cons token nil))
+ ((eq token 'pe-ref)
+ (cons (ebnf-dtd-lex) nil)) ; annotation
+ ((eq token 'element-decl)
+ (ebnf-dtd-elementdecl)) ; rule
+ ((eq token 'attlist-decl)
+ (ebnf-dtd-attlistdecl)) ; annotation
+ ((eq token 'entity-decl)
+ (ebnf-dtd-entitydecl)) ; annotation
+ ((eq token 'notation-decl)
+ (ebnf-dtd-notationdecl)) ; annotation
+ (t
+ (error "Invalid DOCTYPE element"))
+ ))
+
+
+;;; elementdecl ::= '<!ELEMENT' S Name S contentspec S? '>'
+;;;
+;;; contentspec ::= 'EMPTY' | 'ANY' | Mixed | children
+;;;
+;;; Mixed ::= '(' S? '#PCDATA' (S? '|' S? Name)* S? ')*'
+;;; | '(' S? '#PCDATA' S? ')'
+;;;
+;;; children ::= (choice | seq) ('?' | '*' | '+')?
+;;;
+;;; choice ::= '(' S? cp ( S? '|' S? cp )+ S? ')'
+;;;
+;;; seq ::= '(' S? cp ( S? ',' S? cp )* S? ')'
+;;;
+;;; cp ::= (Name | choice | seq) ('?' | '*' | '+')?
+
+
+(defun ebnf-dtd-elementdecl ()
+ (let ((action ebnf-action)
+ name token body)
+ (setq ebnf-action nil)
+ (or (eq (ebnf-dtd-lex) 'name)
+ (error "Invalid ELEMENT name"))
+ (setq name ebnf-dtd-lex
+ token (ebnf-dtd-lex)
+ body (cond ((memq token '(empty any))
+ (let ((term (ebnf-make-terminal ebnf-dtd-lex)))
+ (cons (ebnf-dtd-lex) term)))
+ ((eq token 'begin-group)
+ (setq token (ebnf-dtd-lex))
+ (if (eq token 'pcdata)
+ (ebnf-dtd-mixed)
+ (ebnf-dtd-children token)))
+ (t
+ (error "Invalid ELEMENT content"))
+ ))
+ (or (eq (car body) 'end-decl)
+ (error "Missing `>' in ELEMENT declaration"))
+ (ebnf-eps-add-production name)
+ (cons (ebnf-dtd-lex)
+ (ebnf-make-production name (cdr body) action))))
+
+
+;;; Mixed ::= '(' S? '#PCDATA' (S? '|' S? Name)* S? ')*'
+;;; | '(' S? '#PCDATA' S? ')'
+
+
+(defun ebnf-dtd-mixed ()
+ (let* ((alt (cons (ebnf-make-terminal ebnf-dtd-lex) nil))
+ (token (ebnf-dtd-lex))
+ (has-alternative (eq token 'alternative)))
+ (while (eq token 'alternative)
+ (or (eq (ebnf-dtd-lex) 'name)
+ (error "Invalid name"))
+ (setq alt (cons ebnf-dtd-lex alt)
+ token (ebnf-dtd-lex)))
+ (or (eq token 'end-group)
+ (error "Missing `)'"))
+ (and has-alternative
+ (or (eq (ebnf-dtd-lex) 'zero-or-more)
+ (error "Missing `*'")))
+ (ebnf-token-alternative alt (cons (ebnf-dtd-lex) nil))))
+
+
+;;; children ::= (choice | seq) ('?' | '*' | '+')?
+
+
+(defun ebnf-dtd-children (token)
+ (ebnf-dtd-operators (ebnf-dtd-choice-seq token)))
+
+
+;;; choice ::= '(' S? cp ( S? '|' S? cp )+ S? ')'
+;;;
+;;; seq ::= '(' S? cp ( S? ',' S? cp )* S? ')'
+
+
+(defun ebnf-dtd-choice-seq (token)
+ (setq token (ebnf-dtd-cp token))
+ (let (elist)
+ (cond
+ ;; choice
+ ((eq (car token) 'alternative)
+ (while (eq (car token) 'alternative)
+ (setq elist (cons (cdr token) elist)
+ token (ebnf-dtd-cp (ebnf-dtd-lex))))
+ (setq elist (ebnf-token-alternative elist token)))
+ ;; seq
+ ((eq (car token) 'comma)
+ (while (eq (car token) 'comma)
+ (setq elist (cons (cdr token) elist)
+ token (ebnf-dtd-cp (ebnf-dtd-lex))))
+ (setq elist (ebnf-token-sequence (cons (cdr token) elist))))
+ ;; only one element
+ (t
+ (setq elist (cdr token))))
+ (or (eq (car token) 'end-group)
+ (error "Missing `)' in ELEMENT content"))
+ elist))
+
+
+;;; cp ::= (Name | choice | seq) ('?' | '*' | '+')?
+
+
+(defun ebnf-dtd-cp (token)
+ (ebnf-dtd-operators (cond ((eq token 'name)
+ (ebnf-make-terminal ebnf-dtd-lex))
+ ((eq token 'begin-group)
+ (ebnf-dtd-choice-seq (ebnf-dtd-lex)))
+ (t
+ (error "Invalid element"))
+ )))
+
+
+;;; elm ('?' | '*' | '+')?
+
+
+(defun ebnf-dtd-operators (elm)
+ (let ((token (ebnf-dtd-lex)))
+ (cond ((eq token 'optional) ; ? - optional
+ (cons (ebnf-dtd-lex) (ebnf-token-optional elm)))
+ ((eq token 'zero-or-more) ; * - zero or more
+ (cons (ebnf-dtd-lex) (ebnf-make-zero-or-more elm)))
+ ((eq token 'one-or-more) ; + - one or more
+ (cons (ebnf-dtd-lex) (ebnf-make-one-or-more elm)))
+ (t ; only element
+ (cons token elm))
+ )))
+
+
+;;; AttlistDecl ::= '<!ATTLIST' S Name AttDef* S? '>'
+;;;
+;;; AttDef ::= S Name S AttType S DefaultDecl
+;;;
+;;; AttType ::= StringType | TokenizedType | EnumeratedType
+;;;
+;;; StringType ::= 'CDATA'
+;;;
+;;; TokenizedType ::= 'ID'
+;;; | 'IDREF'
+;;; | 'IDREFS'
+;;; | 'ENTITY'
+;;; | 'ENTITIES'
+;;; | 'NMTOKEN'
+;;; | 'NMTOKENS'
+;;;
+;;; EnumeratedType ::= NotationType | Enumeration
+;;;
+;;; NotationType ::= 'NOTATION' S '(' S? Name (S? '|' S? Name)* S? ')'
+;;;
+;;; Enumeration ::= '(' S? Nmtoken (S? '|' S? Nmtoken)* S? ')'
+;;;
+;;; DefaultDecl ::= '#REQUIRED'
+;;; | '#IMPLIED'
+;;; | (('#FIXED' S)? AttValue)
+;;;
+;;;
+;;; AttValue ::= '"' ([^<&"] | Reference)* '"'
+;;; | "'" ([^<&'] | Reference)* "'"
+;;;
+;;; Reference ::= EntityRef | CharRef
+;;;
+;;; EntityRef ::= '&' Name ';'
+;;;
+;;; CharRef ::= '&#' [0-9]+ ';'
+;;; | '&#x' [0-9a-fA-F]+ ';'
+
+;;; "^\\(&\\([A-Za-z_:][-A-Za-z0-9._:]*\\|#\\(x[0-9a-fA-F]+\\|[0-9]+\\)\\);\\|[^<&]\\)*$"
+
+
+(defun ebnf-dtd-attlistdecl ()
+ (or (eq (ebnf-dtd-lex) 'name)
+ (error "Invalid ATTLIST name"))
+ (let (token)
+ (while (eq (setq token (ebnf-dtd-lex)) 'name)
+ ;; type
+ (setq token (ebnf-dtd-lex))
+ (cond
+ ((eq token 'notation)
+ (or (eq (ebnf-dtd-lex) 'begin-group)
+ (error "Missing `(' in NOTATION type in ATTLIST declaration"))
+ (ebnf-dtd-namelist "NOTATION" '(name)))
+ ((eq token 'begin-group)
+ (ebnf-dtd-namelist "enumeration" '(name name-char)))
+ ((memq token
+ '(cdata id idref idrefs entity entities nmtoken nmtokens)))
+ (t
+ (error "Invalid type in ATTLIST declaration")))
+ ;; default value
+ (setq token (ebnf-dtd-lex))
+ (unless (memq token '(required implied))
+ (and (eq token 'fixed)
+ (setq token (ebnf-dtd-lex)))
+ (or (and (eq token 'string)
+ (string-match
+ "^\\(&\\([A-Za-z_:][-A-Za-z0-9._:]*\\|#\\(x[0-9a-fA-F]+\\|[0-9]+\\)\\);\\|[^<&]\\)*$"
+ ebnf-dtd-lex))
+ (error "Invalid default value in ATTLIST declaration"))))
+ (or (eq token 'end-decl)
+ (error "Missing `>' in end of ATTLIST"))
+ (cons (ebnf-dtd-lex) nil)))
+
+
+(defun ebnf-dtd-namelist (type name-list)
+ (let (token)
+ (while (progn
+ (or (memq (ebnf-dtd-lex) name-list)
+ (error "Invalid name in %s type in ATTLIST declaration" type))
+ (eq (setq token (ebnf-dtd-lex)) 'alternative)))
+ (or (eq token 'end-group)
+ (error "Missing `)' in %s type in ATTLIST declaration" type))))
+
+
+;;; 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
+;;;
+;;; NDataDecl ::= S 'NDATA' S Name
+;;;
+;;;
+;;; EntityValue ::= '"' ([^%&"] | PEReference | Reference)* '"'
+;;; | "'" ([^%&'] | PEReference | Reference)* "'"
+;;;
+;;; PEReference ::= '%' Name ';'
+;;;
+;;; Reference ::= EntityRef | CharRef
+;;;
+;;; EntityRef ::= '&' Name ';'
+;;;
+;;; CharRef ::= '&#' [0-9]+ ';'
+;;; | '&#x' [0-9a-fA-F]+ ';'
+
+;;; "^\\(%[A-Za-z_:][-A-Za-z0-9._:]*;\\|&\\([A-Za-z_:][-A-Za-z0-9._:]*\\|#\\(x[0-9a-fA-F]+\\|[0-9]+\\)\\);\\|[^%&]\\)*$"
+
+
+(defun ebnf-dtd-entitydecl ()
+ (let* ((token (ebnf-dtd-lex))
+ (pedecl (eq token 'percent)))
+ (and pedecl
+ (setq token (ebnf-dtd-lex)))
+ (or (eq token 'name)
+ (error "Invalid name of ENTITY"))
+ (setq token (ebnf-dtd-lex))
+ (if (eq token 'string)
+ (if (string-match
+ "^\\(%[A-Za-z_:][-A-Za-z0-9._:]*;\\|&\\([A-Za-z_:][-A-Za-z0-9._:]*\\|#\\(x[0-9a-fA-F]+\\|[0-9]+\\)\\);\\|[^%&]\\)*$"
+ ebnf-dtd-lex)
+ (setq token (ebnf-dtd-lex))
+ (error "Invalid ENTITY definition"))
+ (setq token (ebnf-dtd-externalid token))
+ (when (and (not pedecl) (eq token 'ndata))
+ (or (eq (ebnf-dtd-lex) 'name)
+ (error "Invalid NDATA name"))
+ (setq token (ebnf-dtd-lex))))
+ (or (eq token 'end-decl)
+ (error "Missing `>' in end of ENTITY"))
+ (cons (ebnf-dtd-lex) nil)))
+
+
+;;; NotationDecl ::= '<!NOTATION' S Name S (ExternalID | PublicID) S? '>'
+;;;
+;;; PublicID ::= 'PUBLIC' S PubidLiteral
+
+
+(defun ebnf-dtd-notationdecl ()
+ (or (eq (ebnf-dtd-lex) 'name)
+ (error "Invalid name NOTATION"))
+ (or (eq (ebnf-dtd-externalid-or-publicid) 'end-decl)
+ (error "Missing `>' in end of NOTATION"))
+ (cons (ebnf-dtd-lex) nil))
+
+
+;;; ExternalID ::= 'SYSTEM' S SystemLiteral
+;;; | 'PUBLIC' S PubidLiteral S SystemLiteral
+;;;
+;;; PublicID ::= 'PUBLIC' S PubidLiteral
+
+
+(defun ebnf-dtd-externalid-or-publicid ()
+ (let ((token (ebnf-dtd-lex)))
+ (cond ((eq token 'system)
+ (ebnf-dtd-systemliteral))
+ ((eq token 'public)
+ (ebnf-dtd-pubidliteral)
+ (and (eq (setq token (ebnf-dtd-lex)) 'string)
+ (setq token (ebnf-dtd-lex)))
+ token)
+ (t
+ (error "Missing `SYSTEM' or `PUBLIC'")))))
+
+\f
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Lexical analyzer
+
+
+(defconst ebnf-dtd-token-table (make-vector 256 'error)
+ "Vector used to map characters to a lexical token.")
+
+
+(defun ebnf-dtd-initialize ()
+ "Initialize EBNF token table."
+ ;; control character & control 8-bit character are set to `error'
+ (let ((char ?\060))
+ ;; digits: 0-9
+ (while (< char ?\072)
+ (aset ebnf-dtd-token-table char 'name-char)
+ (setq char (1+ char)))
+ ;; printable character: A-Z
+ (setq char ?\101)
+ (while (< char ?\133)
+ (aset ebnf-dtd-token-table char 'name)
+ (setq char (1+ char)))
+ ;; printable character: a-z
+ (setq char ?\141)
+ (while (< char ?\173)
+ (aset ebnf-dtd-token-table char 'name)
+ (setq char (1+ char)))
+ ;; European 8-bit accentuated characters:
+ (setq char ?\240)
+ (while (< char ?\400)
+ (aset ebnf-dtd-token-table char 'name)
+ (setq char (1+ char)))
+ ;; Override name characters:
+ (aset ebnf-dtd-token-table ?_ 'name)
+ (aset ebnf-dtd-token-table ?: 'name)
+ (aset ebnf-dtd-token-table ?. 'name-char)
+ (aset ebnf-dtd-token-table ?- 'name-char)
+ ;; Override space characters:
+ (aset ebnf-dtd-token-table ?\n 'space) ; [NL] linefeed
+ (aset ebnf-dtd-token-table ?\r 'space) ; [CR] carriage return
+ (aset ebnf-dtd-token-table ?\t 'space) ; [HT] horizontal tab
+ (aset ebnf-dtd-token-table ?\ 'space) ; [SP] space
+ ;; Override other lexical characters:
+ (aset ebnf-dtd-token-table ?= 'equal)
+ (aset ebnf-dtd-token-table ?, 'comma)
+ (aset ebnf-dtd-token-table ?* 'zero-or-more)
+ (aset ebnf-dtd-token-table ?+ 'one-or-more)
+ (aset ebnf-dtd-token-table ?| 'alternative)
+ (aset ebnf-dtd-token-table ?% 'percent)
+ (aset ebnf-dtd-token-table ?& 'ampersand)
+ (aset ebnf-dtd-token-table ?# 'hash)
+ (aset ebnf-dtd-token-table ?\? 'interrogation)
+ (aset ebnf-dtd-token-table ?\" 'double-quote)
+ (aset ebnf-dtd-token-table ?\' 'single-quote)
+ (aset ebnf-dtd-token-table ?< 'less-than)
+ (aset ebnf-dtd-token-table ?> 'end-decl)
+ (aset ebnf-dtd-token-table ?\( 'begin-group)
+ (aset ebnf-dtd-token-table ?\) 'end-group)
+ (aset ebnf-dtd-token-table ?\[ 'begin-subset)
+ (aset ebnf-dtd-token-table ?\] 'end-subset)))
+
+
+;; replace the range "\240-\377" (see `ebnf-range-regexp').
+(defconst ebnf-dtd-name-chars
+ (ebnf-range-regexp "-._:0-9A-Za-z" ?\240 ?\377))
+
+
+(defconst ebnf-dtd-decl-alist
+ '(("ATTLIST" . attlist-decl)
+ ("DOCTYPE" . doctype-decl)
+ ("ELEMENT" . element-decl)
+ ("ENTITY" . entity-decl)
+ ("NOTATION" . notation-decl)))
+
+
+(defconst ebnf-dtd-element-alist
+ '(("#FIXED" . fixed)
+ ("#IMPLIED" . implied)
+ ("#PCDATA" . pcdata)
+ ("#REQUIRED" . required)))
+
+
+(defconst ebnf-dtd-name-alist
+ '(("ANY" . any)
+ ("CDATA" . cdata)
+ ("EMPTY" . empty)
+ ("ENTITIES" . entities)
+ ("ENTITY" . entity)
+ ("ID" . id)
+ ("IDREF" . idref)
+ ("IDREFS" . idrefs)
+ ("NDATA" . ndata)
+ ("NMTOKEN" . nmtoken)
+ ("NMTOKENS" . nmtokens)
+ ("NOTATION" . notation)
+ ("PUBLIC" . public)
+ ("SYSTEM" . system)
+ ("encoding" . encoding-attr)
+ ("standalone" . standalone-attr)
+ ("version" . version-attr)))
+
+
+(defun ebnf-dtd-lex ()
+ "Lexical analyser for DTD.
+
+Return a lexical token.
+
+See documentation for variable `ebnf-dtd-lex'."
+ (if (>= (point) ebnf-limit)
+ 'end-of-input
+ (let (token)
+ ;; skip spaces and comments
+ (while (if (> (following-char) 255)
+ (progn
+ (setq token 'error)
+ nil)
+ (setq token (aref ebnf-dtd-token-table (following-char)))
+ (cond
+ ((eq token 'space)
+ (skip-chars-forward " \n\r\t" ebnf-limit)
+ (< (point) ebnf-limit))
+ ((and (eq token 'less-than)
+ (looking-at "<!--"))
+ (ebnf-dtd-skip-comment))
+ (t nil)
+ )))
+ (cond
+ ;; end of input
+ ((>= (point) ebnf-limit)
+ 'end-of-input)
+ ;; error
+ ((eq token 'error)
+ (error "Illegal character"))
+ ;; beginning of declaration:
+ ;; <?name, <!ATTLIST, <!DOCTYPE, <!ELEMENT, <!ENTITY, <!NOTATION
+ ((eq token 'less-than)
+ (forward-char)
+ (let ((char (following-char)))
+ (cond ((= char ?\?) ; <?
+ (forward-char)
+ (setq ebnf-dtd-lex (ebnf-buffer-substring ebnf-dtd-name-chars))
+ 'begin-pi)
+ ((= char ?!) ; <!
+ (forward-char)
+ (let ((decl (ebnf-buffer-substring ebnf-dtd-name-chars)))
+ (or (cdr (assoc decl ebnf-dtd-decl-alist))
+ (error "Invalid declaration name `%s'" decl))))
+ (t ; <x
+ (error "Invalid declaration `<%c'" char)))))
+ ;; name, namechar
+ ((memq token '(name name-char))
+ (setq ebnf-dtd-lex (ebnf-buffer-substring ebnf-dtd-name-chars))
+ (or (cdr (assoc ebnf-dtd-lex ebnf-dtd-name-alist))
+ token))
+ ;; ?, ?>
+ ((eq token 'interrogation)
+ (forward-char)
+ (if (/= (following-char) ?>)
+ 'optional
+ (forward-char)
+ 'end-pi))
+ ;; #FIXED, #IMPLIED, #PCDATA, #REQUIRED
+ ((eq token 'hash)
+ (forward-char)
+ (setq ebnf-dtd-lex
+ (concat "#" (ebnf-buffer-substring ebnf-dtd-name-chars)))
+ (or (cdr (assoc ebnf-dtd-lex ebnf-dtd-element-alist))
+ (error "Invalid element `%s'" ebnf-dtd-lex)))
+ ;; "string"
+ ((eq token 'double-quote)
+ (setq ebnf-dtd-lex (ebnf-dtd-string ?\"))
+ 'string)
+ ;; 'string'
+ ((eq token 'single-quote)
+ (setq ebnf-dtd-lex (ebnf-dtd-string ?\'))
+ 'string)
+ ;; %, %name;
+ ((eq token 'percent)
+ (forward-char)
+ (if (looking-at "[ \n\r\t]")
+ 'percent
+ (setq ebnf-dtd-lex (ebnf-dtd-name-ref "%"))
+ 'pe-ref))
+ ;; &#...;, &#x...;, &name;
+ ((eq token 'ampersand)
+ (forward-char)
+ (if (/= (following-char) ?#)
+ (progn
+ ;; &name;
+ (setq ebnf-dtd-lex (ebnf-dtd-name-ref "&"))
+ 'entity-ref)
+ ;; &#...;, &#x...;
+ (forward-char)
+ (setq ebnf-dtd-lex (if (/= (following-char) ?x)
+ (ebnf-dtd-char-ref "&#" "0-9")
+ (forward-char)
+ (ebnf-dtd-char-ref "&#x" "0-9a-fA-F")))
+ 'char-ref))
+ ;; miscellaneous: (, ), [, ], =, |, *, +, >, `,'
+ (t
+ (forward-char)
+ token)
+ ))))
+
+
+(defun ebnf-dtd-name-ref (start)
+ (ebnf-dtd-char-ref start ebnf-dtd-name-chars))
+
+
+(defun ebnf-dtd-char-ref (start chars)
+ (let ((char (ebnf-buffer-substring chars)))
+ (or (= (following-char) ?\;)
+ (error "Invalid element `%s%s%c'" start char (following-char)))
+ (forward-char)
+ (format "%s%s;" start char)))
+
+
+;; replace the range "\240-\377" (see `ebnf-range-regexp').
+(defconst ebnf-dtd-double-string-chars
+ (ebnf-range-regexp "\t -!#-~" ?\240 ?\377))
+(defconst ebnf-dtd-single-string-chars
+ (ebnf-range-regexp "\t -&(-~" ?\240 ?\377))
+
+
+(defun ebnf-dtd-string (delim)
+ (buffer-substring-no-properties
+ (progn
+ (forward-char)
+ (point))
+ (progn
+ (skip-chars-forward (if (= delim ?\")
+ ebnf-dtd-double-string-chars
+ ebnf-dtd-single-string-chars)
+ ebnf-limit)
+ (or (= (following-char) delim)
+ (error "Missing string delimiter `%c'" delim))
+ (prog1
+ (point)
+ (forward-char)))))
+
+
+;; replace the range "\177-\237" (see `ebnf-range-regexp').
+(defconst ebnf-dtd-comment-chars
+ (ebnf-range-regexp "^-\000-\010\013\014\016-\037" ?\177 ?\237))
+(defconst ebnf-dtd-filename-chars
+ (ebnf-range-regexp "^-\000-\037" ?\177 ?\237))
+
+
+(defun ebnf-dtd-skip-comment ()
+ (forward-char 4) ; <!--
+ (cond
+ ;; open EPS file
+ ((and ebnf-eps-executing (= (following-char) ?\[))
+ (ebnf-eps-add-context (ebnf-dtd-eps-filename)))
+ ;; close EPS file
+ ((and ebnf-eps-executing (= (following-char) ?\]))
+ (ebnf-eps-remove-context (ebnf-dtd-eps-filename)))
+ ;; any other action in comment
+ (t
+ (setq ebnf-action (aref ebnf-comment-table (following-char))))
+ )
+ (while (progn
+ (skip-chars-forward ebnf-dtd-comment-chars ebnf-limit)
+ (and (< (point) ebnf-limit)
+ (not (looking-at "-->"))))
+ (skip-chars-forward "-" ebnf-limit))
+ ;; check for a valid end of comment
+ (cond ((>= (point) ebnf-limit)
+ nil)
+ ((looking-at "-->")
+ (forward-char 3)
+ t)
+ (t
+ (error "Illegal character"))
+ ))
+
+
+(defun ebnf-dtd-eps-filename ()
+ (forward-char)
+ (let (fname)
+ (while (progn
+ (setq fname
+ (concat fname
+ (ebnf-buffer-substring ebnf-dtd-filename-chars)))
+ (and (< (point) ebnf-limit)
+ (= (following-char) ?-) ; may be \n, \t, \r
+ (not (looking-at "-->"))))
+ (setq fname (concat fname (ebnf-buffer-substring "-"))))
+ fname))
+
+\f
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+
+(provide 'ebnf-dtd)
+
+
+;;; arch-tag:
+;;; ebnf-dtd.el ends here
HCoop / bpt / emacs.git / commitdiff