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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 <dsr@hplb.hpl.hp.com> 5th April 1994
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29
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30 Changes:
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31
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32 Added align attribute to headers with same values
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33 and meaning as for paragraphs.
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34
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35 Added prologue and epilogue elements and fixed bug
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36 in definition of %paras with HTML.emph.
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37
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38 Added entity names for standard icons c/o Bert Bos.
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39 This are enabled with the HTML.icons switch.
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40
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41 Added PRE to content model for LI and DD, and changed
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42 DL to require at least one DT per DD. Math is now
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43 part of %text; but can't be nested.
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44
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45 Tried to permit an optional epilogue following last
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46 division, but sgmls gave: Content model is ambiguous
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47
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48 Added support for graphical menus to SELECT/OPTION.
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49
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50 Liberalised content model for headers to %text;
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51 Added optional NOFOLD attribute to P element to
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52 inhibit SGML folding of whitespace.
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53
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54 Dropped the LIT element and changed the TAB element
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55 over to the LaTeX model. Added NOWRAP to P element.
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56 Replaced TH/TD's align=numeric with ALIGNON="." etc.
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57
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58 Made anchor NAME attribute conditional on HTML.obsolete
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59 Added HTML.obsolete for obsoleted HTML elements
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60
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61 Added SIG attribute to A and LINK for specifying
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62 a digital signature to attest that a linked document
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63 is unchanged.
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64
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65 SRC attribute added to NOTE to allow authors to override
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66 the default icon chosen on the basis of the ROLE attribute.
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67
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68 Switched REL/REV back to CDATA to avoid trouble with duplicate
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69 name or name token error. Using an explicit list of relationship
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70 types would force us to drop REV.
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71
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72 Added top/bottom alignment attribute to CAPTION
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73
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74 REL and REV domains now defined by parameter entities
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75
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76 SRC attribute added to LINK to allow images to be used
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77 in document specific toolbar
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78
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79 Baseline attribute added to FIG and IMG to give precise
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80 control of vertical position relative to baseline.
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81
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82 Revised comments for <A> and <LINK> to remove references to
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83 obsoleted timing attributes and to add a list of "standard"
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84 relationship types.
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85
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86 CHANGED element now uses more meaningful attribute names.
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87
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88 STATE dropped in favor of INPUT with TYPE="hidden". Forms now
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89 support a link to a script for client-side execution of constraints.
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90
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91 The element definition for DIV1..DIV6 and P no longer permit the
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92 start tag to be omitted. This was regrettably forced by a
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93 restriction in the SGML standard. Browsers *must* be capable of
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94 inferring them when missing,in order to cope with legacy documents.
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95
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96 Fixed some errors in earlier version to do with start tags and
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97 definitions of parameter entities. The content model for FIG has
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98 been changed to use a P element for text to avoid an SGML parsing
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99 problem with a line break before the caption.
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100 --
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101 CHARSET
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102 BASESET "ISO 646:1983//CHARSET
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103 International Reference Version (IRV)//ESC 2/5 4/0"
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104 DESCSET 0 9 UNUSED
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105 9 2 9
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106 11 2 UNUSED
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107 13 1 13
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108 14 18 UNUSED
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109 32 95 32
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110 127 1 UNUSED
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111 BASESET "ISO Registration Number 100//CHARSET
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112 ECMA-94 Right Part of Latin Alphabet Nr. 1//ESC 2/13 4/1"
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113 DESCSET 128 32 UNUSED
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114 160 95 32
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115 255 1 UNUSED
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116
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117 CAPACITY SGMLREF
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118 TOTALCAP 150000
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119 GRPCAP 150000
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120
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121 SCOPE DOCUMENT
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122 SYNTAX
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123 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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124 19 20 21 22 23 24 25 26 27 28 29 30 31 127 255
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125 BASESET "ISO 646:1983//CHARSET
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126 International Reference Version (IRV)//ESC 2/5 4/0"
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127 DESCSET 0 128 0
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128 FUNCTION RE 13
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129 RS 10
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130 SPACE 32
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131 TAB SEPCHAR 9
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132 NAMING LCNMSTRT ""
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133 UCNMSTRT ""
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134 LCNMCHAR ".-"
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135 UCNMCHAR ".-"
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136 NAMECASE GENERAL YES
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137 ENTITY NO
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138 DELIM GENERAL SGMLREF
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139 SHORTREF SGMLREF
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140 NAMES SGMLREF
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141 QUANTITY SGMLREF
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142 NAMELEN 32
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143 TAGLVL 100
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144 LITLEN 1024
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145 GRPGTCNT 150
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146 GRPCNT 64
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147
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148 FEATURES
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149 MINIMIZE
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150 DATATAG NO
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151 OMITTAG YES
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152 RANK NO
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153 SHORTTAG NO
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154 LINK
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155 SIMPLE NO
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156 IMPLICIT NO
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157 EXPLICIT NO
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158 OTHER
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159 CONCUR NO
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160 SUBDOC NO
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161 FORMAL YES
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162 APPINFO NONE
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163 >
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