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1 <!SGML "ISO 8879:1986"
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2 --
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3 Document Type Definition for the HyperText Markup Language Plus
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4 for use with the World Wide Web application (HTML+ DTD).
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5 This DTD is designed for use with SGML authoring tools and
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6 it is expected that most browsers will tolerate omissions,
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7 in particular, missing <DIVn> elements and <P> start tags
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8 following headers, which can easily be inferred from the context.
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9
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10 The HTML+ DTD which is structured as an HTML core plus a
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11 number of additional modules which can be included by an
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12 entity definition in a document's <!DOCTYPE> element.
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13 You can include specific features in your document
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14 using the DOCTYPE declaration at the start, e.g.
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15
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16 <!DOCTYPE htmlplus [
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17 <!ENTITY % HTML.tables "INCLUDE">
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18 <!ENTITY % HTML.forms "INCLUDE">
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19 ]>
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20
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21 This spec also allows for authors to extend the DTD and
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22 to define how any new elements are rendered in terms of
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23 existing ones. This should be used with caution.
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24
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25 I would like to acknowledge the influence of the TEI DTDs
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26 which proved very helpful in restructuring the DTD.
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27
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28 Dave Raggett 21st March 1994
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29
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30 Changes:
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31
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32 Added support for graphical menus to SELECT/OPTION.
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33
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34 Liberalised content model for headers to %text;
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35 Added SPACES attribute to P element to preserve spaces.
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36
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37 Dropped the LIT element and changed the TAB element
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38 over to the LaTeX model. Added NOWRAP to P element.
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39 Replaced TH/TD's align=numeric with ALIGNON="." etc.
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40
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41 Made anchor NAME attribute conditional on HTML.obsolete
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42 Added HTML.obsolete for obsoleted HTML elements
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43
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44 Added SIG attribute to A and LINK for specifying
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45 a digital signature to attest that a linked document
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46 is unchanged.
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47
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48 SRC attribute added to NOTE to allow authors to override
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49 the default icon chosen on the basis of the ROLE attribute.
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50
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51 Switched REL/REV back to CDATA to avoid trouble with duplicate
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52 name or name token error. Using an explicit list of relationship
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53 types would force us to drop REV.
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54
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55 Added top/bottom alignment attribute to CAPTION
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56
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57 REL and REV domains now defined by parameter entities
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58
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59 SRC attribute added to LINK to allow images to be used
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60 in document specific toolbar
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61
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62 Baseline attribute added to FIG and IMG to give precise
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63 control of vertical position relative to baseline.
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64
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65 Revised comments for <A> and <LINK> to remove references to
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66 obsoleted timing attributes and to add a list of "standard"
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67 relationship types.
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68
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69 CHANGED element now uses more meaningful attribute names.
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70
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71 STATE dropped in favor of INPUT with TYPE="hidden". Forms now
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72 support a link to a script for client-side execution of constraints.
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73
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74 The element definition for DIV1..DIV6 and P no longer permit the
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75 start tag to be omitted. This was regrettably forced by a
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76 restriction in the SGML standard. Browsers *must* be capable of
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77 inferring them when missing,in order to cope with legacy documents.
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78
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79 Fixed some errors in earlier version to do with start tags and
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80 definitions of parameter entities. The content model for FIG has
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81 been changed to use a P element for text to avoid an SGML parsing
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82 problem with a line break before the caption.
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83 --
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84 CHARSET
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85 BASESET "ISO 646:1983//CHARSET
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86 International Reference Version (IRV)//ESC 2/5 4/0"
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87 DESCSET 0 9 UNUSED
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88 9 2 9
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89 11 2 UNUSED
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90 13 1 13
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91 14 18 UNUSED
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92 32 95 32
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93 127 1 UNUSED
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94 BASESET "ISO Registration Number 100//CHARSET
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95 ECMA-94 Right Part of Latin Alphabet Nr. 1//ESC 2/13 4/1"
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96 DESCSET 128 32 UNUSED
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97 160 95 32
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98 255 1 UNUSED
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99
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100 CAPACITY SGMLREF
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101 TOTALCAP 150000
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102 GRPCAP 150000
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103
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104 SCOPE DOCUMENT
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105 SYNTAX
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106 SHUNCHAR CONTROLS 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
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107 19 20 21 22 23 24 25 26 27 28 29 30 31 127 255
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108 BASESET "ISO 646:1983//CHARSET
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109 International Reference Version (IRV)//ESC 2/5 4/0"
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110 DESCSET 0 128 0
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111 FUNCTION RE 13
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112 RS 10
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113 SPACE 32
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114 TAB SEPCHAR 9
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115 NAMING LCNMSTRT ""
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116 UCNMSTRT ""
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117 LCNMCHAR ".-"
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118 UCNMCHAR ".-"
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119 NAMECASE GENERAL YES
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120 ENTITY NO
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121 DELIM GENERAL SGMLREF
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122 SHORTREF SGMLREF
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123 NAMES SGMLREF
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124 QUANTITY SGMLREF
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125 NAMELEN 32
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126 TAGLVL 100
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127 LITLEN 1024
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128 GRPGTCNT 150
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129 GRPCNT 64
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130
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131 FEATURES
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132 MINIMIZE
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133 DATATAG NO
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134 OMITTAG YES
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135 RANK NO
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136 SHORTTAG NO
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137 LINK
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138 SIMPLE NO
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139 IMPLICIT NO
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140 EXPLICIT NO
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141 OTHER
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142 CONCUR NO
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143 SUBDOC NO
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144 FORMAL YES
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145 APPINFO NONE
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146 >
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147
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148 <!DOCTYPE HTMLPLUS [
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149
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150 <!-- DTD for HTML+
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151 Markup minimisation should be avoided, otherwise the default <!SGML>
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152 declaration is fine. Browsers should be forgiving of markup errors,
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153 while authoring tools *should* enforce compliance with the DTD.
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154
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155 Common Attributes:
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156
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157 id This attribute allows authors to name elements such as headers
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158 and paragraphs as potential destinations for links. Note that
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159 links don't specify points, but rather extended objects.
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160
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161 charset This allows authors to switch to a different char set for
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162 quotations or list etc. This is particularly useful for oriental
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163 languages which need two byte character codes, e.g. see RFC 1468
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164 "Japanese Character Encoding for Internet Messages"
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165
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166 ENTITY DECLARATIONS
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167
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168 <!ENTITY % foo "X | Y | Z"> is a macro definition for parameters and in
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169 subsequent statements, the string "%foo;" is expanded to "X | Y | Z"
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170
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171 Various classes of SGML text types:
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172
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173 CDATA text which doesn't include markup or entity references
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174 RCDATA text with entity references but no markup
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175 PCDATA text occurring in a context in which markup and entity references
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176 may occur.
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177 -->
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178
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179 <!-- Core HTML+ DTD omits following features -->
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180 <!ENTITY % HTML.math "IGNORE">
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181 <!ENTITY % HTML.tables "IGNORE">
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182 <!ENTITY % HTML.figures "IGNORE">
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183 <!ENTITY % HTML.emph "IGNORE">
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184 <!ENTITY % HTML.forms "IGNORE">
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185 <!ENTITY % HTML.obsolete "IGNORE">
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186
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187 <!ENTITY % cextra "" -- for character-like elements -->
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188 <!ENTITY % pextra "" -- for paragraph-like elements -->
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189
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190 <!-- %cextra; and %pextra are designed to allow document specific
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191 extensions to the HTML+ DTD, e.g.
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192
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193 <!DOCTYPE htmlplus [
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194 <!ENTITY % cextra "|PROPNAME">
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195 <!ELEMENT PROPNAME - - CDATA>
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196 ]>
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197
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198 Use the RENDER element to specify how the browser should
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199 display new elements in terms of existing ones, e.g.
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200
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201 <RENDER tag="PROPNAME" style="I">
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202 -->
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203
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204 <!ENTITY % URL "CDATA" -- a URL or URN designating a hypertext node -->
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205
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206 <!-- Browsers should render the following types of emphasis
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207 distinctly when the obvious rendering is impractical
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208
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209 I = italic, B = bold, U = underline, S = strikethru,
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210 TT = teletype font, SUP = superscript, SUB = subscript
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211 REV = reverse video for highlighting hit areas in the result of a query
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212 Q = inline quote (render according to local conventions)
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213 -->
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214
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215 <!ENTITY % emph1 "I|B|U|TT|CITE|EM|STRONG|KBD|VAR|DFN|CODE|SAMP">
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216 <!ENTITY % emph2 "S|Q|PERSON|ACRONYM|ABBREV|CMD|ARG|REMOVED|ADDED|REV">
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217 <!ENTITY % emph3 "SUP|SUB|CHANGED|TAB|HIDE">
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218
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219 <![ %HTML.emph [ <!ENTITY % emph "%emph1;|%emph2;|%emph3;"> ]]>
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220 <!ENTITY % emph "%emph1;">
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221
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222 <![ %HTML.emph [ <!ENTITY % misc1 "|RENDER|FOOTNOTE|MARGIN"> ]]>
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223 <!ENTITY % misc1 "">
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224
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225 <![ %HTML.forms [ <!ENTITY % misc2 "|INPUT|TEXTAREA|SELECT"> ]]>
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226 <!ENTITY % misc2 "">
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227
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228 <!ENTITY % misc "BR %misc1 %misc2; %cextra;">
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229
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230 <![ %HTML.figures [ <!ENTITY % text "#PCDATA|A|IMG|FIG|%emph;|%misc;"> ]]>
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231 <!ENTITY % text "#PCDATA|A|IMG|%emph;|%misc;">
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232
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233 <![ %HTML.emph [ <!ENTITY % paras "P|PRE|%pextra;"> ]]>
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234 <!ENTITY % paras "P|PRE %pextra;">
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235
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236 <!ENTITY % lists "UL|OL|DL">
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237
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238 <![ %HTML.emph [ <!ENTITY % block1 "NOTE|QUOTE|ABSTRACT|ADDRESS|HR"> ]]>
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239 <!ENTITY % block1 "ADDRESS|HR">
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240
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241 <![ %HTML.tables [ <!ENTITY % block2 "|TABLE"> ]]>
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242 <!ENTITY % block2 "">
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243
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244 <![ %HTML.forms [ <!ENTITY % block3 "|FORM"> ]]>
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245 <!ENTITY % block3 "">
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246
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247 <![ %HTML.math [ <!ENTITY % block4 "|MATH"> ]]>
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248 <!ENTITY % block4 "">
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249
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250 <![ %HTML.obsolete [ <!ENTITY % block5 "|MENU|DIR|BLOCKQUOTE"> ]]>
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251 <!ENTITY % block5 "">
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252
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253 <!ENTITY % block "%block1; %block2; %block3; %block4; %block5;">
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254
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255 <![ %HTML.emph [<!ENTITY % setup1 "& RENDER*"> ]]>
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256 <!ENTITY % setup1 "">
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257
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258 <!ENTITY % setup "(TITLE? & ISINDEX? & BASE? & META* & LINK* %setup1;)">
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259
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260 <!ENTITY % main "%block;|%lists;|%paras;">
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261
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262 <!-- these entities are used to simplify element definitions -->
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263
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264 <!ENTITY % heading "H1|H2|H3|H4|H5|H6">
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265 <!ENTITY % table "P|%heading;|%lists;">
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266 <!ENTITY % math "BOX|ARRAY|ROOT|%text;">
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267
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268 <![ %HTML.obsolete [<!ENTITY % anchorname "name NMTOKEN #IMPLIED"> ]]>
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269 <!ENTITY % anchorname "">
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270
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271 <!-- Browsers should as a minimum support the following types
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272 of INPUT fields, in addition to TEXTAREA and SELECT:
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273
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274 text, checkbox, radio, submit, and reset
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275
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276 password, int, float, date, url can be mapped to text fields
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277 while image, scribble and audio fields can be ignored
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278 -->
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279
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280 <![ %HTML.forms [
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281 <!ENTITY % fields "text|password|checkbox|radio|submit|reset|int|
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282 float|date|url|hidden|range|scribble|audio">
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283 ]]>
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284
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285
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286 <!-- Core DTD includes basic Latin-1 entities -->
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287 <!ENTITY % ISOlat1 PUBLIC "ISO 8879-1986//ENTITIES Added Latin 1//EN">
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288 %ISOlat1;
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289
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290 <!-- additional entities normally found in Latin-1 char sets-->
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291 <!ENTITY % ISOnum PUBLIC "ISO 8879-1986//ENTITIES Numeric and Special Graphic//EN">
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292 %ISOnum;
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293
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294 <!-- diacritical marks normally found in Latin-1 char sets-->
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295 <!ENTITY % ISOdia PUBLIC "ISO 8879-1986//ENTITIES Diacritical Marks//EN">
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296 %ISOdia;
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297
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298 <!-- misc. from ISO Publishing entities -->
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299 <!ENTITY ndash SDATA "[ndash ]"--=en dash-->
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300 <!ENTITY mdash SDATA "[ndash ]"--=em dash-->
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301 <!ENTITY ensp SDATA "[ensp ]"--=en space (1/2-em)-->
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302 <!ENTITY emsp SDATA "[emsp ]"--=em space-->
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303 <!ENTITY hellip SDATA "[hellip]"--=ellipsis (horizontal)-->
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304 <!ENTITY vellip SDATA "[vellip]"--=ellipsis (vertical)-->
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305
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306 <!-- maths symbols when needed -->
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307 <![ %HTML.math [
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308 <!ENTITY % ISOtech PUBLIC "ISO 8879-1986//ENTITIES General Technical//EN">
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309 %ISOtech;
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310
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311 <!ENTITY % ISOgrk3 PUBLIC "ISO 8879-1986//ENTITIES Greek Symbols//EN">
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312 %ISOgrk3;
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313
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314 <!ENTITY % ISOamso PUBLIC "ISO 8879-1986//ENTITIES Added Math Symbols: Ordinary//EN">
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315 %ISOamso;
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316
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317 <!ENTITY % ISOamsr PUBLIC "ISO 8879-1986//ENTITIES Added Math Symbols: Relations//EN">
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318 %ISOamsr;
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319
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320 <!ENTITY % ISOamsc PUBLIC "ISO 8879-1986//ENTITIES Added Math Symbols: Delimiters//EN">
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321 %ISOamsc;
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322
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323 <!-- misc. from ISO Binary and Large operators -->
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324
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325 <!ENTITY thinsp SDATA "[thinsp]"--=thin space (1/6 em)-->
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326 <!ENTITY coprod SDATA "[coprod]"--/coprod L: coproduct operator-->
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327 <!ENTITY prod SDATA "[prod ]"--/prod L: product operator-->
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328 <!ENTITY sum SDATA "[sum ]"--/sum L: summation operator-->
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329 ]]>
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330
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331 <!-- Basic types of elements:
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332 <!ELEMENT tagname - - CONTENT> elements needing end tags
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333 <!ELEMENT tagname - O CONTENT> elements with optional end tags
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334 <!ELEMENT tagname - O EMPTY> elements without content or end tags
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335
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336 The content definition is:
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337 - an entity definition as defined above
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338 - a tagname
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339 - (brackets enclosing the above)
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340 These may be combined with the operators:
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341 A* A occurs zero or more times
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342 A+ A occurs one or more times
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343 A|B implies either A or B
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344 A? A occurs zero or one times
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345 A,B implies first A then B
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346 A&B either or both A and B (in either order A B or B A)
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347 -->
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348
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349 <!ELEMENT HTMLPLUS O O (HEAD, BODY)>
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350 <!ATTLIST HTMLPLUS
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351 version CDATA #IMPLIED -- the HTML+ version number --
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352 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
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353
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354 <!ELEMENT HEAD - O (%setup;) -- delimits document wide properties -->
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355 <!ELEMENT BODY - O ((%main;)*, DIV6*, DIV5*, DIV4*, DIV3*, DIV2*, DIV1*)>
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356
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357 <!--
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358 Browsers *must* tolerate missing DIVn tags, e.g. the presence of an
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359 <H1> tag implies a DIV1 element enclosing it and the following text.
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360 The SGML standard unfortunately doesn't permit such inferences due
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361 to a decision made to simplify writing general SGML parsers.
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362 -->
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363
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364 <!ELEMENT DIV1 - - (H1, (%main;)*, DIV6*, DIV5*, DIV4*, DIV3*, DIV2*)>
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365 <!ELEMENT DIV2 - - (H2, (%main;)*, DIV6*, DIV5*, DIV4*, DIV3*)>
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366 <!ELEMENT DIV3 - - (H3, (%main;)*, DIV6*, DIV5*, DIV4*)>
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367 <!ELEMENT DIV4 - - (H4, (%main;)*, DIV6*, DIV5*)>
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368 <!ELEMENT DIV5 - - (H5, (%main;)*, DIV6*)>
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369 <!ELEMENT DIV6 - - (H6, (%main;)*)>
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370
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371 <!ATTLIST (DIV6|DIV5|DIV4|DIV3|DIV2|DIV1)
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372 id ID #IMPLIED -- link destination --
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373 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
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374
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375 <!-- Document headers -->
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376 <!ELEMENT (%heading;) - - (%text;)+>
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377 <!ATTLIST (%heading;)
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378 id ID #IMPLIED -- defines link destination --
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379 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
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380
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381 <!-- character emphasis -->
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382 <!ELEMENT (%emph1;) - - (%text;)+>
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383 <!ATTLIST (%emph1;)
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384 id ID #IMPLIED -- link destination --
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385 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
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386
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387 <!--
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388 Paragraphs which act as containers for the following text
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389
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390 Browsers *must* be capable of inferring missing <P>
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391 start tags from the content model. Basically, if the parser
|
|
|
392 comes across unexpected %text; then there's a missing <P>.
|
|
|
393 -->
|
|
|
394 <!ELEMENT P - O (%text;)+>
|
|
|
395 <!ATTLIST P
|
|
|
396 id ID #IMPLIED -- link destination --
|
|
|
397 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese --
|
|
|
398 nowrap (nowrap) #IMPLIED -- disable word wrap --
|
|
|
399 spaces (spaces) #IMPLIED -- preserve spaces --
|
|
|
400 align (left|indent|center|right|justify) left>
|
|
|
401
|
|
|
402 <!ELEMENT HR - O EMPTY -- Horizontal Rule -->
|
|
|
403 <!ELEMENT BR - O EMPTY -- forced line break -->
|
|
|
404
|
|
|
405 <!ELEMENT PRE - - (%text;)+ -- preformatted fixed pitch text -->
|
|
|
406 <!ATTLIST PRE
|
|
|
407 id ID #IMPLIED -- link destination --
|
|
|
408 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
409
|
|
|
410 <!ELEMENT ADDRESS - - (P)+ -- info on author -->
|
|
|
411 <!ATTLIST ADDRESS
|
|
|
412 id ID #IMPLIED -- link destination --
|
|
|
413 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
414
|
|
|
415 <!-- Lists which can be nested -->
|
|
|
416 <!ELEMENT OL - - (LI)+ -- ordered list -->
|
|
|
417 <!ATTLIST OL
|
|
|
418 id ID #IMPLIED
|
|
|
419 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese --
|
|
|
420 compact (compact) #IMPLIED -- reduced interitem spacing -->
|
|
|
421
|
|
|
422 <!ELEMENT UL - - (LI)+ -- unordered list -->
|
|
|
423 <!ATTLIST UL
|
|
|
424 id ID #IMPLIED -- link destination --
|
|
|
425 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese --
|
|
|
426 compact (compact) #IMPLIED -- reduced interitem spacing --
|
|
|
427 plain (plain) #IMPLIED -- suppress bullets --
|
|
|
428 wrap (vert|horiz|none) none -- multicolumn list wrap style -->
|
|
|
429
|
|
|
430 <!-- List items for UL and OL lists
|
|
|
431 The icon or label overides the default rendering -->
|
|
|
432 <!ELEMENT LI - O (DL|UL|OL|P|HR)+ -- should we add PRE? -->
|
|
|
433 <!ATTLIST LI
|
|
|
434 id ID #IMPLIED
|
|
|
435 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese --
|
|
|
436 icon %URL; #IMPLIED -- icon for use in place of bullet --
|
|
|
437 label CDATA #IMPLIED -- when you can't show the icon -->
|
|
|
438
|
|
|
439 <!-- Definition Lists (terms + definitions) -->
|
|
|
440 <!ELEMENT DL - - (DT*,DD)+>
|
|
|
441 <!ATTLIST DL
|
|
|
442 id ID #IMPLIED
|
|
|
443 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese --
|
|
|
444 compact (compact) #IMPLIED -- reduced interitem spacing -->
|
|
|
445
|
|
|
446 <!ELEMENT DT - O (%text;)+ -- term text -- >
|
|
|
447 <!ELEMENT DD - O (P|UL|OL|DL|HR)+ -- definition text (should we add PRE?)-- >
|
|
|
448 <!ATTLIST (DT|DD)
|
|
|
449 id ID #IMPLIED
|
|
|
450 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
451
|
|
|
452 <!-- Hypertext Links from points within document nodes
|
|
|
453
|
|
|
454 The HREF attribute specifies the link destination as a URL or URN.
|
|
|
455 In figures, the SHAPE attribute defines the extent of the link as
|
|
|
456 a polygonal region, and is used with the FIG element.
|
|
|
457
|
|
|
458 The PRINT attribute determines how the browser should deal with
|
|
|
459 links when printing this document. This makes it possible for
|
|
|
460 users to print a document and related subdocuments with a single
|
|
|
461 menu action. If PRINT="Section", then the link is followed and
|
|
|
462 printed as a follow-on section after the current document. If
|
|
|
463 PRINT="Footnote" and the linked document is sufficiently small
|
|
|
464 then it is included as a footnote. If PRINT="Reference" then the
|
|
|
465 document's URL (and title) is included in a footnote or in a list
|
|
|
466 of references at the end of the document.
|
|
|
467
|
|
|
468 The TITLE attribute may be used for links in which the destination
|
|
|
469 node doesn't define a title itself, e.g. non-html documents.
|
|
|
470
|
|
|
471 The REL attribute is used to specify how the browser interprets
|
|
|
472 the link when this document is being used as a hypertext path
|
|
|
473 REL="Path" causes the linked document to be treated as a path
|
|
|
474 and inserted into the current path, while REL="Node" treats
|
|
|
475 the linked document as a node on the current path. REL="Embed"
|
|
|
476 is a hint to embed the referenced node into the current document.
|
|
|
477
|
|
|
478 The SIG attribute allows authors to specify a digital signature
|
|
|
479 of linked documents to check that they haven't been changed.
|
|
|
480 It starts with a prefix denoting the algorithm used, in particular
|
|
|
481 SIG="md5:2l3k4j2lkj423l" denotes the MD5 signature: 2l3k4j2lkj423l
|
|
|
482 which is encoded using the standard MIME base64 representation
|
|
|
483 -->
|
|
|
484
|
|
|
485 <!ELEMENT A - - (#PCDATA | IMG | %emph;)*>
|
|
|
486 <!ATTLIST A
|
|
|
487 id ID #IMPLIED -- as target of link --
|
|
|
488 %anchorname; -- see HTML.obsolete --
|
|
|
489 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese --
|
|
|
490 shape CDATA #IMPLIED -- list of points for shaped buttons --
|
|
|
491 href %URL; #IMPLIED -- destination node --
|
|
|
492 rel CDATA #IMPLIED -- forward relationship type --
|
|
|
493 rev CDATA #IMPLIED -- reverse relationship type --
|
|
|
494 print CDATA #IMPLIED -- reference/footnote/section --
|
|
|
495 title CDATA #IMPLIED -- when otherwise unavailable --
|
|
|
496 sig CDATA #IMPLIED -- MD5 digital signature -->
|
|
|
497
|
|
|
498 <!-- Other kinds of relationships between documents
|
|
|
499
|
|
|
500 There are a set of standard RELationship types which alter the
|
|
|
501 browser's navigation menu:
|
|
|
502
|
|
|
503 UseIndex searchable index
|
|
|
504 UseGlossary shared glossary
|
|
|
505 Contents shared contents page
|
|
|
506 Previous previous document in a hypertext path
|
|
|
507 Next next document in a hypertext path
|
|
|
508 Bookmark named with the title attribute
|
|
|
509 Made Defines who is the "maker" of this document
|
|
|
510 Help provides help on this document
|
|
|
511 Annotation an additional note on current document
|
|
|
512 Reply a note with equal footing to current document
|
|
|
513 Subdocument defines parent->child relationship
|
|
|
514 Parent defines child->parent relationship
|
|
|
515 StyleSheet an associated style sheet
|
|
|
516
|
|
|
517 Bookmarks allow authors to define a set of useful links
|
|
|
518 which are to be accessed via a menu, rather than as conventional
|
|
|
519 in-line hypertext links. Previous and Next links are inserted
|
|
|
520 by the browser when interpreting a separate document as a path.
|
|
|
521 See above description of REL="Node" and REL="Path" for <A>.
|
|
|
522
|
|
|
523 The FROM attribute makes it possible to specify annotation
|
|
|
524 links separately from the document text flow. The FROM
|
|
|
525 attribute specifies an ID for the source of a link, while
|
|
|
526 the HREF attribute specifies its destination. HTTP servers
|
|
|
527 can use the WWW-Link: header to "insert" such annotations
|
|
|
528 into documents.
|
|
|
529 -->
|
|
|
530
|
|
|
531 <!ELEMENT LINK - O EMPTY>
|
|
|
532 <!ATTLIST LINK
|
|
|
533 id ID #IMPLIED -- to allow meta info on links --
|
|
|
534 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese --
|
|
|
535 from IDREF #IMPLIED -- starting point --
|
|
|
536 href %URL; #REQUIRED -- destination node --
|
|
|
537 rel CDATA #IMPLIED -- forward relationship type --
|
|
|
538 rev CDATA #IMPLIED -- reverse relationship type --
|
|
|
539 src %URL; #IMPLIED -- an image for displaying link --
|
|
|
540 print CDATA #IMPLIED -- reference/footnote/section --
|
|
|
541 title CDATA #IMPLIED -- when otherwise unavailable --
|
|
|
542 seal CDATA #IMPLIED -- MD5 digital signature -->
|
|
|
543
|
|
|
544 <!-- Document title -->
|
|
|
545 <!ELEMENT TITLE - - (#PCDATA | %emph;)+>
|
|
|
546 <!ATTLIST TITLE
|
|
|
547 id ID #IMPLIED -- link destination --
|
|
|
548 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
549
|
|
|
550 <!-- Original document URL for resolving relative URLs -->
|
|
|
551 <!ELEMENT BASE - O EMPTY>
|
|
|
552 <!ATTLIST BASE HREF %URL; #IMPLIED>
|
|
|
553
|
|
|
554 <!-- Signifies the document's URL accepts queries,
|
|
|
555 and may be implied by HTTP header info -->
|
|
|
556 <!ELEMENT ISINDEX - O EMPTY>
|
|
|
557 <!ATTLIST ISINDEX href %URL; #IMPLIED -- defaults to document's URL -->
|
|
|
558
|
|
|
559 <!--
|
|
|
560 Servers should read the document head to generate HTTP headers
|
|
|
561 corresponding to META elements, e.g. if the document contains:
|
|
|
562
|
|
|
563 <meta name="Expires" value="Tue, 04 Dec 1993 21:29:02 GMT">
|
|
|
564
|
|
|
565 The server should include the HTTP date format header field:
|
|
|
566
|
|
|
567 Expires: Tue, 04 Dec 1993 21:29:02 GMT
|
|
|
568
|
|
|
569 Other likely names are "Keywords", "Created", "Owner" (a name)
|
|
|
570 and "Reply-To" (an email address)
|
|
|
571 -->
|
|
|
572
|
|
|
573 <!ELEMENT META - O EMPTY>
|
|
|
574 <!ATTLIST META
|
|
|
575 id ID #IMPLIED -- to allow meta info --
|
|
|
576 name CDATA #IMPLIED -- HTTP header e.g. "Expires" --
|
|
|
577 value CDATA #IMPLIED -- associated value -->
|
|
|
578
|
|
|
579 <![ %HTML.obsolete [
|
|
|
580
|
|
|
581 <!ELEMENT (MENU|DIR) - - (LI)+ -- plain single/multicolumn lists-->
|
|
|
582 <!ATTLIST (MENU|DIR)
|
|
|
583 compact (compact) #IMPLIED -- reduced interitem spacing -->
|
|
|
584
|
|
|
585 <!ELEMENT BLOCKQUOTE - - (P)+ -- extended quotes -->
|
|
|
586
|
|
|
587 ]]>
|
|
|
588
|
|
|
589 <![ %HTML.emph [
|
|
|
590
|
|
|
591 <!-- additional character emphasis -->
|
|
|
592 <!ELEMENT (%emph2;) - - (%text;)*>
|
|
|
593 <!ATTLIST (%emph2;)
|
|
|
594 id ID #IMPLIED -- link destination --
|
|
|
595 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
596
|
|
|
597 <!ELEMENT (SUP|SUB) - - (%text;)* -- superscripts and subscripts -->
|
|
|
598 <!ATTLIST (SUP|SUB)
|
|
|
599 id ID #IMPLIED -- link destination --
|
|
|
600 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
601
|
|
|
602 <!ELEMENT (FOOTNOTE|MARGIN) - - (%text;)* -(FOOTNOTE|MARGIN)>
|
|
|
603 <!ATTLIST (FOOTNOTE|MARGIN)
|
|
|
604 id ID #IMPLIED -- link destination --
|
|
|
605 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
606
|
|
|
607 <!-- RENDER only appears in the document head -->
|
|
|
608 <!ELEMENT RENDER -O EMPTY -- how to render unknown elements -->
|
|
|
609 <!ATTLIST RENDER
|
|
|
610 id ID #IMPLIED -- to allow meta info --
|
|
|
611 tag CDATA #IMPLIED -- tag name --
|
|
|
612 equiv CDATA #IMPLIED -- HTML+ equivalent tag name --
|
|
|
613 style NAMES #IMPLIED -- space separated list of styles -->
|
|
|
614
|
|
|
615 <!-- Based on LaTeX's tabbing environment -->
|
|
|
616 <!ELEMENT TAB - O EMPTY>
|
|
|
617 <!ATTLIST TAB
|
|
|
618 id ID #IMPLIED -- used to set a tab stop --
|
|
|
619 to IDREF #IMPLIED -- move to previously defined tab stop --
|
|
|
620 before NUMBER 0 -- scaled em spaces before tab stop --
|
|
|
621 after NUMBER 0 -- scaled em spaces after tab stop --
|
|
|
622 reset (reset) #IMPLIED -- clear all previous tab stops -->
|
|
|
623
|
|
|
624 <!-- content is hidden, equivalent of LaTeX's \kill -->
|
|
|
625 <!ELEMENT HIDE - - (%text;) (-HIDE)>
|
|
|
626
|
|
|
627 <!ELEMENT QUOTE - - (P*) -- block quote -->
|
|
|
628 <!ATTLIST QUOTE
|
|
|
629 id ID #IMPLIED -- link destination --
|
|
|
630 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
631
|
|
|
632 <!ELEMENT ABSTRACT - - (P*) -- document summary -->
|
|
|
633 <!ATTLIST ABSTRACT
|
|
|
634 id ID #IMPLIED -- link destination --
|
|
|
635 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
636
|
|
|
637 <!-- often rendered with an icon in left margin,
|
|
|
638 the role is shown before the first paragraph -->
|
|
|
639 <!ELEMENT NOTE - - (P*) -- admonishment -->
|
|
|
640 <!ATTLIST NOTE
|
|
|
641 id ID #IMPLIED -- link destination --
|
|
|
642 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese --
|
|
|
643 src %URL; #IMPLIED -- url for the icon --
|
|
|
644 role (Simple|Tip|Note|Warning|Error) Simple >
|
|
|
645
|
|
|
646 <!-- change bars can bridge markup boundaries -->
|
|
|
647 <!ELEMENT CHANGED - O EMPTY>
|
|
|
648 <!ATTLIST CHANGED -- one of id or idref is always required --
|
|
|
649 begin ID #IMPLIED -- signals beginning of changes --
|
|
|
650 end IDREF #IMPLIED -- signals end of changes -->
|
|
|
651 ]]>
|
|
|
652
|
|
|
653
|
|
|
654 <![ %HTML.figures [ <!ENTITY % HTML.captions "INCLUDE"> ]]>
|
|
|
655 <![ %HTML.tables [ <!ENTITY % HTML.captions "INCLUDE"> ]]>
|
|
|
656 <!ENTITY % HTML.captions "IGNORE">
|
|
|
657
|
|
|
658 <![ %HTML.captions [
|
|
|
659
|
|
|
660 <!ELEMENT CAPTION - - (%text;)+ -- table or figure caption -->
|
|
|
661 <!ATTLIST CAPTION
|
|
|
662 id ID #IMPLIED
|
|
|
663 align (top|bottom) #IMPLIED
|
|
|
664 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
665 ]]>
|
|
|
666
|
|
|
667 <![ %HTML.tables [
|
|
|
668
|
|
|
669 <!-- a pre-pass is needed to count columns and determine
|
|
|
670 min/max widths before sizing to match window size -->
|
|
|
671
|
|
|
672 <!ELEMENT TABLE - - (CAPTION?, TR*) -- mixed headers and data -->
|
|
|
673 <!ATTLIST TABLE
|
|
|
674 id ID #IMPLIED
|
|
|
675 border (border) #IMPLIED -- draw borders --
|
|
|
676 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
677
|
|
|
678 <!-- browsers should tolerate an omission of the first
|
|
|
679 <TR> tag as it is implied by the context -->
|
|
|
680 <!ELEMENT TR - O (TH|TD)* -- acts like row separator -->
|
|
|
681 <!ATTLIST TR id ID #IMPLIED>
|
|
|
682
|
|
|
683 <!ELEMENT TH - O (%table;)* -- a header cell -->
|
|
|
684 <!ATTLIST TH
|
|
|
685 id ID #IMPLIED
|
|
|
686 colspan NUMBER 1 -- columns spanned --
|
|
|
687 rowspan NUMBER 1 -- rows spanned --
|
|
|
688 align (left|center|right) center
|
|
|
689 alignon CDATA #IMPLIED -- align on decimal point etc --
|
|
|
690 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
691
|
|
|
692 <!ELEMENT TD - O (%table;)* -- a data cell -->
|
|
|
693 <!ATTLIST TD
|
|
|
694 id ID #IMPLIED
|
|
|
695 colspan NUMBER 1 -- columns spanned --
|
|
|
696 rowspan NUMBER 1 -- rows spanned --
|
|
|
697 align (left|center|right) center
|
|
|
698 alignon CDATA #IMPLIED -- align on decimal point etc --
|
|
|
699 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
700 ]]>
|
|
|
701
|
|
|
702 <![ %HTML.forms [
|
|
|
703
|
|
|
704 <!--
|
|
|
705 The form contents are sent to the server upon pressing a submit
|
|
|
706 button. Forms can be associated with scripts, e.g. to make one
|
|
|
707 selection field effect which options are enabled for other fields.
|
|
|
708
|
|
|
709 Clicking on a selection or typing into a text field result in events
|
|
|
710 which are processed by the script. Event handlers are associated
|
|
|
711 with each field or with the form itself. The script language is
|
|
|
712 deliberately restricted to avoid any security issues.
|
|
|
713
|
|
|
714 Fields can be disabled (greyed out) or marked as being in error.
|
|
|
715 The MESSAGE element may be used by the server to set error messages.
|
|
|
716 Servers can store state information in forms with hidden input fields.
|
|
|
717 These are not displayed and can be used to hold transaction handles etc.
|
|
|
718 -->
|
|
|
719
|
|
|
720 <!ELEMENT FORM - - ((%main;)*, MESSAGE?) -(FORM) -- forms can't be nested -->
|
|
|
721 <!ATTLIST FORM
|
|
|
722 id ID #IMPLIED
|
|
|
723 action %URL; #IMPLIED -- defaults for URL for current doc --
|
|
|
724 method CDATA #IMPLIED -- GET, PUT, POST, DELETE etc. --
|
|
|
725 enctype CDATA #IMPLIED -- encoding type for form transfers --
|
|
|
726 script %URL; #IMPLIED -- locally executed event handlers --
|
|
|
727 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
728
|
|
|
729 <!-- Types of INPUT field:
|
|
|
730 text: one line text fields, size gives visible width of field in chars
|
|
|
731 where value may grow beyond this up to MAX (MAXLENGTH) chars.
|
|
|
732 password: like text fields but with no echo of typed characters
|
|
|
733 checkbox: for simple yes/no choices
|
|
|
734 radio: for one from many choices, each radio button in a group
|
|
|
735 has the same NAME but a different VALUE.
|
|
|
736 submit: Sends form to server. If the SRC attribute specifies an
|
|
|
737 icon the point clicked is sent to the server. The default
|
|
|
738 NAME for this field is "Submit". Use different names for
|
|
|
739 multiple submit buttons in a form.
|
|
|
740 reset: Resets fields to their initial values.
|
|
|
741 int: for input of integers, SIZE attribute gives width of field
|
|
|
742 float: for input of floating point numbers
|
|
|
743 date: for input of dates
|
|
|
744 url: for input of universal resource locators
|
|
|
745 hidden: used by server for state info, opaque to client
|
|
|
746 range: integer range from MIN to MAX, rendered as a slider etc.
|
|
|
747 scribble: pen input, which may include time and pressure info
|
|
|
748 audio: sound input with up to MAX seconds
|
|
|
749 -->
|
|
|
750 <!ELEMENT INPUT - O EMPTY>
|
|
|
751 <!ATTLIST INPUT
|
|
|
752 id ID #IMPLIED -- to allow meta info --
|
|
|
753 name CDATA #IMPLIED -- attribute name (may not be unique) --
|
|
|
754 type (%fields) text -- a wide variety of field types --
|
|
|
755 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese --
|
|
|
756 size CDATA #IMPLIED -- visible size of text fields --
|
|
|
757 min NUMBER #IMPLIED -- for range controls --
|
|
|
758 max NUMBER #IMPLIED -- for range controls or text fields --
|
|
|
759 maxlength NUMBER #IMPLIED -- max length of text fields (equiv to max)--
|
|
|
760 value CDATA #IMPLIED -- attribute value (altered by user) --
|
|
|
761 checked (checked) #IMPLIED -- for check boxes and radio buttons --
|
|
|
762 disabled (disabled) #IMPLIED -- if grayed out --
|
|
|
763 error (error) #IMPLIED -- if in error --
|
|
|
764 src %URL; #IMPLIED -- for SUBMIT, SCRIBBLE & AUDIO fields --
|
|
|
765 alt CDATA #IMPLIED -- alternative text for VT100's etc --
|
|
|
766 align (top|middle|bottom) top -- for IMAGE fields only -->
|
|
|
767
|
|
|
768 <!-- multiline text input fields, we probably will want
|
|
|
769 to generalise this to accept arbitrary clipboard data
|
|
|
770 e.g. hypertext and images, in addition to plain text -->
|
|
|
771 <!ELEMENT TEXTAREA - - RCDATA -- multi-line text fields -->
|
|
|
772 <!ATTLIST TEXTAREA
|
|
|
773 id ID #IMPLIED -- to allow meta info --
|
|
|
774 name CDATA #IMPLIED -- attribute name (may not be unique) --
|
|
|
775 cols NUMBER #IMPLIED -- visible width in characters --
|
|
|
776 rows NUMBER #IMPLIED -- visible height in characters --
|
|
|
777 wrap (wrap) #IMPLIED -- wrap input in text area --
|
|
|
778 disabled (disabled) #IMPLIED -- if grayed out --
|
|
|
779 error (error) #IMPLIED -- if in error --
|
|
|
780 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
781
|
|
|
782 <!--
|
|
|
783 The EDIT attribute when present allows you to type and
|
|
|
784 edit the selected option.
|
|
|
785
|
|
|
786 The SRC attribute allows for graphical menus, e.g. users
|
|
|
787 wanting to buy a house could click on each of the areas on
|
|
|
788 a map that they were interested in.
|
|
|
789 -->
|
|
|
790 <!ELEMENT SELECT - - (OPTION+) -- combo style selection lists -->
|
|
|
791 <!ATTLIST SELECT
|
|
|
792 id ID #IMPLIED -- to allow meta info --
|
|
|
793 name CDATA #IMPLIED -- attribute name (may not be unique) --
|
|
|
794 edit NUMBER #IMPLIED -- width of editable selection --
|
|
|
795 multiple (multiple) #IMPLIED -- permits multiple selections --
|
|
|
796 error (error) #IMPLIED -- if in error --
|
|
|
797 src %URL; #IMPLIED -- for graphical menus --
|
|
|
798 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
799
|
|
|
800 <!-- The SHAPE attribute defines a region in the image that
|
|
|
801 is specified by the SRC attribute for the SELECT element -->
|
|
|
802 <!ELEMENT OPTION - O RCDATA>
|
|
|
803 <!ATTLIST OPTION
|
|
|
804 id ID #IMPLIED -- to allow meta info --
|
|
|
805 value CDATA #IMPLIED -- attribute value --
|
|
|
806 selected (selected) #IMPLIED -- if initially selected --
|
|
|
807 disabled (disabled) #IMPLIED -- if grayed out --
|
|
|
808 shape CDATA #IMPLIED -- list of points for shaped region --
|
|
|
809 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
810
|
|
|
811 <!--
|
|
|
812 Scripts executed by the client need a way of displaying
|
|
|
813 warning/error messages. We define an element so that the
|
|
|
814 server too can initialise this one-per-form message area.
|
|
|
815 Clients should preferably avoid displaying the message
|
|
|
816 in-line, as the window size may prevent the user from
|
|
|
817 seeing the message.
|
|
|
818 -->
|
|
|
819 <!ELEMENT MESSAGE - O RCDATA -- place for error/warning/info -->
|
|
|
820 <!ATTLIST MESSAGE
|
|
|
821 id ID #IMPLIED -- to allow meta info --
|
|
|
822 status (info|warning|error) info
|
|
|
823 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
824 ]]>
|
|
|
825
|
|
|
826 <![ %HTML.figures [
|
|
|
827
|
|
|
828 <!-- figures which subsume the role of the earlier IMG element.
|
|
|
829
|
|
|
830 Behaves identically to IMG for align = top, middle or bottom.
|
|
|
831 Otherwise figure is inserted after next line break (soft or hard).
|
|
|
832 For align=left, the image is left aligned and text is flowed
|
|
|
833 on the right of the image, and similarly for align=right, with
|
|
|
834 no text flow for align=center (the default). The caption is
|
|
|
835 placed under the image.
|
|
|
836
|
|
|
837 Finer control of the vertical positioning relative to the text
|
|
|
838 line is possible with the baseline attribute. When present, the
|
|
|
839 figure acts like the IMG element but is shifted so that the baseline
|
|
|
840 occurs at the specified number of pixels above the bottom of the image.
|
|
|
841 If this is given as a floating point number, it is interpreted as a
|
|
|
842 fraction of the image height and must lie in the range (0.0 to 1.0)
|
|
|
843
|
|
|
844 The <A> element is used for shaped buttons handled by browser,
|
|
|
845 while the ISMAP mechanism sends pointer clicks/drags to server.
|
|
|
846 The text contained by this element is used for text-only displays
|
|
|
847 and authors should remember to provide effective descriptions,
|
|
|
848 including label text for shaped buttons.
|
|
|
849 -->
|
|
|
850 <!ELEMENT FIG - - (CAPTION?, P*)>
|
|
|
851 <!ATTLIST FIG
|
|
|
852 id ID #IMPLIED
|
|
|
853 align (top|middle|bottom|left|center|right) center -- position --
|
|
|
854 baseline NUMBER #IMPLIED -- height of baseline above image bottom --
|
|
|
855 ismap (ismap) #IMPLIED -- server can handle mouse clicks/drags --
|
|
|
856 src %URL; #IMPLIED -- link to image data --
|
|
|
857 charset CDATA #IMPLIED -- eg "ISO-2022-JP" for japanese -->
|
|
|
858 ]]>
|
|
|
859
|
|
|
860 <!-- img is left in for at least the short term -->
|
|
|
861 <!ELEMENT IMG - O EMPTY>
|
|
|
862 <!ATTLIST IMG
|
|
|
863 src %URL; #REQUIRED -- where to get image data --
|
|
|
864 align (top|middle|bottom) top -- top, middle or bottom --
|
|
|
865 baseline NUMBER #IMPLIED -- height of baseline above image bottom --
|
|
|
866 alt CDATA #IMPLIED -- description for text-only displays --
|
|
|
867 ismap (ismap) #IMPLIED -- send mouse clicks/drags to server -->
|
|
|
868
|
|
|
869 <![ %HTML.math [
|
|
|
870
|
|
|
871 <!-- Proposal for representing formulae
|
|
|
872
|
|
|
873 Delimiters should stretch to match the size of the delimited
|
|
|
874 object. <SUB> and <SUP> are used for subscripts and superscripts
|
|
|
875
|
|
|
876 i j
|
|
|
877 X <SUP>i</SUP>Y<SUP>j</SUP> is X Y
|
|
|
878
|
|
|
879 i.e. the space following the X disambiguates the binding.
|
|
|
880 -->
|
|
|
881
|
|
|
882 <!ELEMENT MATH - - (%math;)*>
|
|
|
883 <!ATTLIST MATH id ID #IMPLIED>
|
|
|
884
|
|
|
885 <!-- Invisible brackets which may also be
|
|
|
886 used for numerators and denominators:
|
|
|
887
|
|
|
888 1 + X
|
|
|
889 <BOX>1 + X<OVER>Y</BOX> is _______
|
|
|
890 Y
|
|
|
891
|
|
|
892 _____
|
|
|
893 <BOX><OVER>X + Y</BOX> is X + Y
|
|
|
894 -->
|
|
|
895 <!ELEMENT BOX - - ((%math;)*, (OVER, (%math;)*)?)>
|
|
|
896
|
|
|
897 <!-- Horizontal line between numerator and denominator
|
|
|
898 The symbol attribute allows authors to supply an
|
|
|
899 entity name for an arrow symbol etc.
|
|
|
900 -->
|
|
|
901 <!ELEMENT OVER - O EMPTY>
|
|
|
902 <!ATTLIST OVER symbol ENTITY #IMPLIED>
|
|
|
903
|
|
|
904 <!-- Roots - default to square root -->
|
|
|
905 <!ELEMENT ROOT - - (%math;)*>
|
|
|
906 <!ATTLIST ROOT root CDATA #IMPLIED>
|
|
|
907
|
|
|
908 <!-- LaTeX like arrays. The align attribute specifies
|
|
|
909 a single letter for each column, which also determines
|
|
|
910 how the column should be aligned, e.g. align=ccc"
|
|
|
911
|
|
|
912 "l" left
|
|
|
913 "c" center
|
|
|
914 "r" right
|
|
|
915 -->
|
|
|
916 <!ELEMENT ARRAY - - (ITEM)+>
|
|
|
917 <!ATTLIST ARRAY align CDATA #REQUIRED>
|
|
|
918
|
|
|
919 <!ELEMENT ITEM - O (%math;)*>
|
|
|
920
|
|
|
921 ]]>
|
|
|
922
|
|
|
923 <!-- The END -->
|
|
|
924 ]>
|
|
|
925
|
