| 1 |
wakaba |
1.1 |
<!DOCTYPE html> |
| 2 |
|
|
<html xmlns="http://www.w3.org/1999/xhtml" |
| 3 |
|
|
xmlns:d="http://suika.fam.cx/~wakaba/archive/2007/wdcc-desc/" |
| 4 |
|
|
id="error-description"> |
| 5 |
|
|
<head> |
| 6 |
|
|
<title xml:lang="en">Description of Errors — |
| 7 |
|
|
Web Document Conformance Checker (BETA)</title> |
| 8 |
|
|
<link rel="stylesheet" href="cc-style"/> |
| 9 |
|
|
<link rel="license" href="#license"/> |
| 10 |
|
|
</head> |
| 11 |
|
|
<body> |
| 12 |
|
|
<h1>Description of Errors</h1> |
| 13 |
|
|
|
| 14 |
wakaba |
1.2 |
<section id="html5-tokenize-error"> |
| 15 |
|
|
<h2>HTML5 Parse Errors in Tokenization Stage</h2> |
| 16 |
wakaba |
1.1 |
|
| 17 |
|
|
<d:item name="duplicate attribute" |
| 18 |
|
|
class="tokenize-error"> |
| 19 |
|
|
<d:message xml:lang="en">There are two attributes with same name.</d:message> |
| 20 |
|
|
<d:desc xml:lang="en"> |
| 21 |
|
|
<p>Attributes must be unique in an element. Specifying |
| 22 |
|
|
attributes with same name more than once is non-conforming.</p> |
| 23 |
|
|
|
| 24 |
|
|
<p>The <code>motion</code> attribute is not part of the HTML standard. |
| 25 |
|
|
Use <code>img</code> element with animation GIF instead.</p> |
| 26 |
|
|
</d:desc> |
| 27 |
|
|
</d:item> |
| 28 |
|
|
|
| 29 |
|
|
<d:item name="nestc" |
| 30 |
|
|
class="tokenize-error"> |
| 31 |
|
|
<d:message xml:lang="en">Void element syntax (<code>/></code>) cannot be |
| 32 |
|
|
used for this element.</d:message> |
| 33 |
|
|
<d:desc xml:lang="en"> |
| 34 |
|
|
<p>The void element syntax <code>/></code> syntax can only be |
| 35 |
|
|
used for <code>base</code>, <code>link</code>, <code>meta</code>, |
| 36 |
|
|
<code>hr</code>, <code>br</code>, <code>img</code>, |
| 37 |
|
|
<code>embed</code>, <code>param</code>, <code>area</code>, |
| 38 |
|
|
<code>col</code>, and <code>input</code> elements. |
| 39 |
|
|
For any other elements, using that syntax is non-conforming.</p> |
| 40 |
|
|
|
| 41 |
|
|
<p>Unlike XML, the void element syntax (<code>/></code>) has |
| 42 |
|
|
no effect in HTML.</p> |
| 43 |
|
|
</d:desc> |
| 44 |
|
|
</d:item> |
| 45 |
|
|
|
| 46 |
|
|
</section> |
| 47 |
|
|
|
| 48 |
wakaba |
1.2 |
<section id="html5-parse-errors"> |
| 49 |
|
|
<h2>HTML5 Parse Errors in Tree Construction Stage</h2> |
| 50 |
|
|
|
| 51 |
|
|
<d:item name="after head" |
| 52 |
|
|
class="parse-error"> |
| 53 |
|
|
<d:message xml:lang="en">The <code><var>$0</var></code> element cannot be |
| 54 |
|
|
inserted between <code>head</code> and <code>body</code> elements.</d:message> |
| 55 |
|
|
<d:desc xml:lang="en"> |
| 56 |
|
|
<p>A start tag occurs after the <code>head</code> element is closed |
| 57 |
|
|
but before the <code>body</code> element is opened. |
| 58 |
|
|
The document is non-conforming.</p> |
| 59 |
|
|
</d:desc> |
| 60 |
|
|
</d:item> |
| 61 |
|
|
|
| 62 |
|
|
<d:item name="no DOCTYPE" |
| 63 |
|
|
class="parse-error"> |
| 64 |
|
|
<d:message xml:lang="en">This document does not start with the |
| 65 |
|
|
<code>DOCTYPE</code> declaration.</d:message> |
| 66 |
|
|
</d:item> |
| 67 |
|
|
|
| 68 |
|
|
<d:item name="not closed" |
| 69 |
|
|
class="parse-error"> |
| 70 |
|
|
<d:message xml:lang="en">Element <code><var>$0</var></code> is not |
| 71 |
|
|
closed.</d:message> |
| 72 |
|
|
</d:item> |
| 73 |
|
|
|
| 74 |
|
|
<d:item name="not HTML5" |
| 75 |
|
|
class="parse-error"> |
| 76 |
|
|
<d:message xml:lang="en">This document is written in an old version of |
| 77 |
|
|
HTML.</d:message> |
| 78 |
|
|
</d:item> |
| 79 |
|
|
|
| 80 |
|
|
<d:item name="unmatched end tag" |
| 81 |
|
|
class="parse-error"> |
| 82 |
|
|
<d:message xml:lang="en">Element <code><var>$0</var></code> is not |
| 83 |
|
|
opened.</d:message> |
| 84 |
|
|
</d:item> |
| 85 |
|
|
|
| 86 |
|
|
</section> |
| 87 |
|
|
|
| 88 |
wakaba |
1.1 |
<section id="element-content-model-errors"> |
| 89 |
|
|
<h2>Element Content Model Errors</h2> |
| 90 |
|
|
|
| 91 |
|
|
<d:item name="character not allowed" |
| 92 |
|
|
class="content-model-error"> |
| 93 |
|
|
<d:message xml:lang="en">Data character is not allowed in this |
| 94 |
|
|
context.</d:message> |
| 95 |
|
|
<d:desc xml:lang="en"> |
| 96 |
|
|
<p>A data character occurs where it is not allowed in this |
| 97 |
|
|
context. The document is non-conforming.</p> |
| 98 |
|
|
|
| 99 |
|
|
<p>Possible causes: |
| 100 |
|
|
<dl> |
| 101 |
|
|
<dt>If the erred element is an inline-level element (such |
| 102 |
|
|
as <code>a</code> or <code>span</code>)</dt> |
| 103 |
|
|
<dd><p>A data character cannot be a child |
| 104 |
|
|
of certain sectioning elements such as <code>body</code>, |
| 105 |
|
|
<code>section</code>, and <code>blockquote</code>.</p> |
| 106 |
|
|
|
| 107 |
|
|
<p>Any inline-level content must be put |
| 108 |
|
|
in e.g. paragraph element such as <code>p</code>.</p></dd> |
| 109 |
|
|
<dt>If the erred element is a block-level element (such as |
| 110 |
|
|
<code>div</code> or <code>h<var>n</var></code>)</dt> |
| 111 |
|
|
<dd><p>Though some elements such as <code>div</code>, |
| 112 |
|
|
<code>li</code>, and <code>td</code> allow |
| 113 |
|
|
<em>either one</em> of block-level or inline-level content |
| 114 |
|
|
is allowed. If there is a block-level content, |
| 115 |
|
|
any inline-level content must be put |
| 116 |
|
|
in e.g. paragraph element such as <code>p</code>.</p></dd> |
| 117 |
|
|
</dl> |
| 118 |
|
|
</p> |
| 119 |
|
|
</d:desc> |
| 120 |
|
|
</d:item> |
| 121 |
|
|
|
| 122 |
|
|
<d:item name="child element missing" |
| 123 |
|
|
class="content-model-error"> |
| 124 |
|
|
<d:message xml:lang="en">There must be a <code><var>$0</var></code> |
| 125 |
|
|
element as a child of this element.</d:message> |
| 126 |
|
|
<d:desc xml:lang="en"> |
| 127 |
|
|
<p>The content model of the element is so defined that it |
| 128 |
|
|
must contain a <code><var>$0</var></code> child element. |
| 129 |
|
|
Without such an element, the document is non-conforming.</p> |
| 130 |
|
|
|
| 131 |
|
|
<p>For example: |
| 132 |
|
|
<ul> |
| 133 |
|
|
<li>The <code>head</code> element must contain exactly one |
| 134 |
|
|
<code>title</code> child element.</li> |
| 135 |
|
|
<li><a href="#child-element-missing:td%7Cth">The <code>tr</code> |
| 136 |
|
|
element must contain one or more <code>td</code> or <code>th</code> |
| 137 |
|
|
child element.</a></li> |
| 138 |
|
|
</ul> |
| 139 |
|
|
</p> |
| 140 |
|
|
</d:desc> |
| 141 |
|
|
</d:item> |
| 142 |
|
|
|
| 143 |
|
|
<d:item name="child element missing:td|th" |
| 144 |
|
|
class="content-model-error"> |
| 145 |
|
|
<d:message xml:lang="en">There must be a <code>td</code> |
| 146 |
|
|
or <code>th</code> element as a child of this element.</d:message> |
| 147 |
|
|
<d:desc xml:lang="en"> |
| 148 |
|
|
<p>The <code>tr</code> element must contain at least one |
| 149 |
|
|
<code>td</code> or <code>th</code> child element. Without |
| 150 |
|
|
such an element, the document is non-conforming.</p> |
| 151 |
|
|
</d:desc> |
| 152 |
|
|
</d:item> |
| 153 |
|
|
|
| 154 |
|
|
<d:item name="element not allowed" |
| 155 |
|
|
class="content-model-error"> |
| 156 |
|
|
<d:message xml:lang="en">This element is not allowed in this |
| 157 |
|
|
context.</d:message> |
| 158 |
|
|
<d:desc xml:lang="en"> |
| 159 |
|
|
<p>An element occurs where it is not allowed. The document |
| 160 |
|
|
is non-conforming.</p> |
| 161 |
|
|
|
| 162 |
|
|
<p>Possible causes: |
| 163 |
|
|
<dl> |
| 164 |
|
|
<dt>If the erred element is an inline-level element (such |
| 165 |
|
|
as <code>a</code> or <code>span</code>)</dt> |
| 166 |
|
|
<dd><p>An inline-level element cannot be a child |
| 167 |
|
|
of certain sectioning elements such as <code>body</code>, |
| 168 |
|
|
<code>section</code>, and <code>blockquote</code>.</p> |
| 169 |
|
|
|
| 170 |
|
|
<p>Any inline-level content must be put |
| 171 |
|
|
in e.g. paragraph element such as <code>p</code>.</p></dd> |
| 172 |
|
|
<dt>If the erred element is a block-level element (such as |
| 173 |
|
|
<code>div</code> or <code>h<var>n</var></code>)</dt> |
| 174 |
|
|
<dd><p>Though some elements such as <code>div</code>, |
| 175 |
|
|
<code>li</code>, and <code>td</code> allow |
| 176 |
|
|
<em>either one</em> of block-level or inline-level content |
| 177 |
|
|
is allowed. If there is a block-level content, |
| 178 |
|
|
any inline-level content must be put |
| 179 |
|
|
in e.g. paragraph element such as <code>p</code>.</p></dd> |
| 180 |
|
|
<dt>If the erred element is the root <code>html</code> element</dt> |
| 181 |
|
|
<dd><p>In an XHTML document, the root <code>html</code> |
| 182 |
|
|
element must have an <code>xmlns</code> attribute |
| 183 |
|
|
whose value is set to |
| 184 |
|
|
<code>http://www.w3.org/1999/xhtml</code>.</p></dd> |
| 185 |
|
|
</dl> |
| 186 |
|
|
</p> |
| 187 |
|
|
</d:desc> |
| 188 |
|
|
</d:item> |
| 189 |
|
|
|
| 190 |
wakaba |
1.2 |
</section> |
| 191 |
|
|
|
| 192 |
|
|
<section id="attribute-value-errors"> |
| 193 |
|
|
<h2>Attribute Value Errors</h2> |
| 194 |
wakaba |
1.1 |
|
| 195 |
wakaba |
1.2 |
<d:item name="enumerated:invalid" |
| 196 |
|
|
class="attribute-error"> |
| 197 |
|
|
<d:message xml:lang="en">This attribute only allow a limited set of |
| 198 |
|
|
values and the specified value is not one of them.</d:message> |
| 199 |
|
|
</d:item> |
| 200 |
|
|
|
| 201 |
|
|
</section> |
| 202 |
|
|
|
| 203 |
|
|
<section id="table-model-errors"> |
| 204 |
|
|
<h2>Table Model Errors</h2> |
| 205 |
|
|
|
| 206 |
|
|
<d:item name="table:no cell in last row" |
| 207 |
|
|
class="table-model-error"> |
| 208 |
|
|
<d:message xml:lang="en">The table has no cell (<code>td</code> or |
| 209 |
|
|
<code>th</code>) in the last row.</d:message> |
| 210 |
|
|
</d:item> |
| 211 |
|
|
|
| 212 |
|
|
</section> |
| 213 |
|
|
|
| 214 |
|
|
<section id="imt-warnings"> |
| 215 |
|
|
<h2>Internet Media Type Warnings</h2> |
| 216 |
|
|
|
| 217 |
|
|
<d:item name="IMT:obsolete subtype" |
| 218 |
|
|
class="should" level="s"> |
| 219 |
|
|
<d:message xml:lang="en">An <em>obsolete</em> subtype is used.</d:message> |
| 220 |
|
|
</d:item> |
| 221 |
|
|
|
| 222 |
|
|
<d:item name="IMT:private subtype" |
| 223 |
|
|
class="should" level="s"> |
| 224 |
|
|
<d:message xml:lang="en">A private (<code>x-</code> or <code>x.</code>) |
| 225 |
|
|
subtype is used.</d:message> |
| 226 |
|
|
</d:item> |
| 227 |
|
|
|
| 228 |
|
|
<d:item name="IMT:unregistered subtype" |
| 229 |
|
|
class="should" level="s"> |
| 230 |
|
|
<d:message xml:lang="en">The subtype is not registered to IANA.</d:message> |
| 231 |
|
|
<!-- TODO: Unknown message?? --> |
| 232 |
|
|
</d:item> |
| 233 |
|
|
|
| 234 |
|
|
</section> |
| 235 |
|
|
|
| 236 |
|
|
<section id="uri-errors"> |
| 237 |
|
|
<h2>URI (or IRI) Errors</h2> |
| 238 |
|
|
|
| 239 |
|
|
<d:item name="URI::syntax error" |
| 240 |
|
|
class="must" level="m"> |
| 241 |
|
|
<d:message xml:lang="en">This string is not an IRI syntactically.</d:message> |
| 242 |
|
|
</d:item> |
| 243 |
|
|
|
| 244 |
|
|
</section> |
| 245 |
|
|
|
| 246 |
|
|
<section id="uri-errors"> |
| 247 |
|
|
<h2>URI (or IRI) Errors</h2> |
| 248 |
|
|
|
| 249 |
|
|
<d:item name="URI::empty path" |
| 250 |
|
|
class="should" level="s"> |
| 251 |
|
|
<d:message xml:lang="en">This IRI should explicitly end with |
| 252 |
|
|
<code>/</code>.</d:message> |
| 253 |
|
|
</d:item> |
| 254 |
wakaba |
1.1 |
|
| 255 |
|
|
</section> |
| 256 |
|
|
|
| 257 |
|
|
<section id="unsupported-messages"> |
| 258 |
|
|
<h2><i>Unsupported</i> Messages</h2> |
| 259 |
|
|
|
| 260 |
wakaba |
1.2 |
<d:item name="attribute" |
| 261 |
|
|
class="unsupported" level="unsupported"> |
| 262 |
wakaba |
1.1 |
<d:message xml:lang="en">This attribute is not supported by the |
| 263 |
|
|
conformance checker; <em>it might or might not be conforming</em>.</d:message> |
| 264 |
|
|
<d:desc xml:lang="en"> |
| 265 |
|
|
<p>The conformant checker does not support the attribute. |
| 266 |
|
|
It cannot determine whether the document is conforming or not.</p> |
| 267 |
|
|
</d:desc> |
| 268 |
|
|
</d:item> |
| 269 |
|
|
|
| 270 |
wakaba |
1.2 |
<d:item name="element" |
| 271 |
|
|
class="unsupported" level="unsupported"> |
| 272 |
wakaba |
1.1 |
<d:message xml:lang="en">This element is not supported by the |
| 273 |
|
|
conformance checker; <em>it might or might not be conforming</em>.</d:message> |
| 274 |
|
|
<d:desc xml:lang="en"> |
| 275 |
|
|
<p>The conformant checker does not support the element. |
| 276 |
|
|
It cannot determine whether the document is conforming or not.</p> |
| 277 |
|
|
</d:desc> |
| 278 |
|
|
</d:item> |
| 279 |
|
|
|
| 280 |
wakaba |
1.2 |
<d:item name="link type" |
| 281 |
|
|
class="unsupported" level="unsupported"> |
| 282 |
wakaba |
1.1 |
<d:message xml:lang="en">The link type <code>$0</code> is not standardized |
| 283 |
|
|
or registered at the time of the release of the conformance checker; |
| 284 |
|
|
<em>it is non-conforming unless it has now been registered</em>.</d:message> |
| 285 |
|
|
<d:desc xml:lang="en"> |
| 286 |
|
|
<p>The <code>rel</code> attribute is defined as a list of link types. |
| 287 |
|
|
Some common link types are defined in the HTML5 specification. |
| 288 |
|
|
Additional link types can be registered to the WHATWG Wiki. |
| 289 |
|
|
use of any other link type is non-conforming.</p> |
| 290 |
|
|
|
| 291 |
|
|
<p>The specified link type is not part of the standard or registry |
| 292 |
|
|
when the database used by the conformance cheker is created. |
| 293 |
|
|
The link type might have been added to the registry since then. |
| 294 |
|
|
In such case it might be conforming. Otherwise, the |
| 295 |
|
|
document is non-conforming.</p> |
| 296 |
|
|
</d:desc> |
| 297 |
|
|
</d:item> |
| 298 |
|
|
|
| 299 |
|
|
</section> |
| 300 |
|
|
|
| 301 |
wakaba |
1.2 |
<d:catalog> |
| 302 |
|
|
manakaiCompatMode:quirks;;Quirks Mode |
| 303 |
|
|
manakaiCompatMode:limited quirks;;Limited Quirks Mode |
| 304 |
|
|
manakaiCompatMode:no quirks;;No Quirks Mode |
| 305 |
|
|
|
| 306 |
|
|
manakaiIsHTML:1;;HTML Document |
| 307 |
|
|
manakaiIsHTML:0;;XML Document |
| 308 |
|
|
</d:catalog> |
| 309 |
|
|
|
| 310 |
wakaba |
1.1 |
<section id="license"> |
| 311 |
|
|
<h2>License of This Document</h2> |
| 312 |
|
|
|
| 313 |
|
|
<p>Copyright 2007 <a href="http://suika.fam.cx/~wakaba/who?">Wakaba</a></p> |
| 314 |
|
|
<p>This library is free software; you can redistribute it |
| 315 |
|
|
and/or modify it under the same terms as Perl itself.</p> |
| 316 |
|
|
</section> |
| 317 |
|
|
|
| 318 |
wakaba |
1.2 |
<!-- $Date: 2007/07/01 10:02:24 $ --> |
| 319 |
wakaba |
1.1 |
</body> |
| 320 |
|
|
</html> |