https://wiki.whatwg.org/api.php?action=feedcontributions&feedformat=atom&user=Demver5
WHATWG Wiki - User contributions [en]
2026-05-10T10:55:32Z
User contributions
MediaWiki 1.39.3
https://wiki.whatwg.org/index.php?title=Longdesc_usage&diff=5400
Longdesc usage
2010-08-21T10:46:00Z
<p>Demver5: /* See Also */</p>
<hr />
<div>This is an analysis of how the <img longdesc=""> attribute is used in the wild, based on the list of 62 pages which used the attribute, available at:<br />
http://canvex.lazyilluminati.com/survey/2007-07-17/analyse.cgi/pages/tagattr/img/longdesc<br />
<br />
The document list is included at the end of this page, numbered. When referring to pages, I just use their number.<br />
<br />
== Errors ==<br />
<br />
* 3, 10, 27, 31, and 46 were redirects; I did not check the pages their pointed to.<br />
* 22, 35, and 37 no longer have the string "longdesc" in them. <br />
<br />
== Results ==<br />
<br />
A large number of the pages were from Wikipedia (or other MediaWiki installations): 1, 2, 6, 9, 11, 17, 19, 21, 24, 25, 29, 30, 36, 43, 45, 54, and 59. MediaWiki has a way of using longdesc particular to itself. Ignoring MediaWiki results:<br />
<br />
* 2 pages used longdesc="" (5, 42)<br />
* 3 pages used longdesc="..." linking to an image of some description (41, 44, 56)<br />
* 12 pages used longdesc="..." not as an URL, but as a human-readable description:<br />
** 4 of which look like SEO attempts (13, 18, 48, 61)<br />
** 3 of which used the same string as they used for alt text (7, 23, 53)<br />
** 3 of which has different alt and longdesc text (16, 28, 52)<br />
** 1 of which used the same string as they did for title="" (15)<br />
** 1 of which used URL-escaped text (49)<br />
** 1 of which is in Russian, which I don't understand (32)<br />
* 20 pages used longdesc="..." as an URL:<br />
** 11 of which point to a location the same as one pointed to with a link nearby (20, 33, 34, 38, 40, 47, 50, 55, 57, 58, 60)<br />
** 4 of which are broken links (4, 14, 26, 57)<br />
** 2 of which are valid links but seems not to comply with the spec (12, 39)<br />
** 2 of which is a correct use of the element (51, 62)<br />
** 1 of which seems to be better dealt with as a hyperlink rather than a longdesc attribute (8)<br />
<br />
On 51, ironically, the only longdesc attribute is used on a link to an automated accessibility checker's website. 62 seems to serve up rather unhelpful text/plain one-liners for longdesc, claiming to be accessible made by a company that does accessible web design.<br />
<br />
== Links list ==<br />
<br />
1: http://fr.wikipedia.org/wiki/Francesco_Borromini<br><br />
2: http://en.wikipedia.org/wiki/Motivation<br><br />
3: http://www.schirmer.com/composers/schoenberg_essay.html<br><br />
4: http://www.huntingtonhousing.com<br><br />
5: http://osierra.com<br><br />
6: http://ru.wikipedia.org/wiki/%D0%98%D1%81%D1%82%D0%BE%D1%80%D0%B8%D1%8F_%D0%90%D1%80%D0%BC%D0%B5%D0%BD%D0%B8%D0%B8 <br><br />
7: http://www.norwalkoh.com/<br><br />
8: http://www.domnowski.de/<br><br />
9: http://de.wikipedia.org/wiki/Morscheid<br><br />
10: http://www.eng.rpi.edu<br><br />
11: http://en.wikipedia.org/wiki/Transport_in_Yemen<br><br />
12: http://www.aclu-ia.org/<br><br />
13: http://airbrush-tanning.us<br><br />
14: http://www.pr-photography.org/<br><br />
15: http://www.shakedown.fi/<br><br />
16: http://www.vds.org.uk<br><br />
17: http://it.wikipedia.org/wiki/Voghiera<br><br />
18: http://www.babylaundryboutique.com/<br><br />
19: http://de.wikipedia.org/wiki/D%C3%A4nische_Sprache<br><br />
20: http://www.coastal-fisherman.com/<br><br />
21: http://fr.wikipedia.org/wiki/Anthemius_de_Tralles<br><br />
22: http://www.hometown.aol.co.uk/thewoburnrally/<br><br />
23: http://www.oblates.us/spiritual_directory.htm<br><br />
24: http://en.wikipedia.org/wiki/Sint_Maarten_national_football_team<br><br />
25: http://en.wikipedia.org/wiki/Long_Grove,_Iowa<br><br />
26: http://www.integracomunicaciones.com/<br><br />
27: http://www.bayern-evangelisch.de/<br><br />
28: http://www.almaprnjavorac.com<br><br />
29: http://en.wikipedia.org/wiki/Osage,_Iowa<br><br />
30: http://en.wikipedia.org/wiki/Bob_Menendez<br><br />
31: http://weatheroffice.ec.gc.ca/city/pages/qc-150_metric_e.html<br><br />
32: http://www.paralife.narod.ru<br><br />
33: http://www.jagdhof.com<br><br />
34: http://www.austria-lustenau.at/<br><br />
35: http://www.expressrealestateschool.com<br><br />
36: http://de.wikipedia.org/wiki/Guckheim<br><br />
37: http://www.vivian-cat.narod.ru/<br><br />
38: http://www.svirp.dk/<br><br />
39: http://www.francedirect.net<br><br />
40: http://www.pointvue.com/cis/<br><br />
41: http://www.arabicdancer.co.uk/<br><br />
42: http://kepek.utcaigyorsulas.hu<br><br />
43: http://es.wikipedia.org/wiki/Tomatina<br><br />
44: http://www.stopitnow.com/<br><br />
45: http://en.wikipedia.org/wiki/THEOS<br><br />
46: http://www.wirtschaft.fh-gelsenkirchen.de/<br><br />
47: http://www.sannong.com<br><br />
48: http://www.integrated-robotics.com<br><br />
49: http://www.waveney.gov.uk/<br><br />
50: http://www.libraryspot.com/<br><br />
51: http://www.teachers.ash.org.au/aussieed/<br><br />
52: http://www.webmeister.dk<br><br />
53: http://www.magicdomico.com/<br><br />
54: http://es.wikipedia.org/wiki/Azerbaiy%C3%A1n<br><br />
55: http://www.puntoluce.tv/<br><br />
56: http://www.bss-ev.de/<br><br />
57: http://www.lowvillegolf.com/<br><br />
58: http://www.brandunity.com/<br><br />
59: http://en.wikipedia.org/wiki/Minos<br><br />
60: http://www.cotondetulear.be/<br><br />
61: http://www.granhotelguadalpinbanus.com<br><br />
62: http://www.libertas-solutions.com<br />
<br />
== See Also ==<br />
* [[Change_Proposal_for_not_including_longdesc]]<br />
<br />
<br />
==Related Links==<br />
<br />
[http://www.cellulite.co.uk/advice/spa-treatment/mesotherapy '''mesotherapie''']</div>
Demver5
https://wiki.whatwg.org/index.php?title=Sanitization_rules&diff=5398
Sanitization rules
2010-08-21T08:59:28Z
<p>Demver5: /* Safe data URL content types */</p>
<hr />
<div>This page was initially seeded with the sanitization lists and rules implemented by the [http://code.google.com/p/html5lib/ html5lib] sanitizer, which in turn was based on [http://golem.ph.utexas.edu/instiki/show/HomePage Jacques Distler's branch of Instiki], which in turn was based on the sanitization logic in the [http://www.feedparser.org/ Universal Feed Parser].<br />
<br />
It is hoped that others will add, update, and extend this list based on their experiences in their own products, and furthermore that some will update their products based on these lists. One such product is [http://htmlpurifier.org/ HTMLPurifier] ([http://intertwingly.net/stories/2007/08/11/diffs diffs]). Another product is [http://www.bloglines.com/help/css-support bloglines].<br />
<br />
As a suggestion but not as a requirement: people who do update their products to reflect information from this list are encouraged to add a link to this page as a comment in the hopes that it will encourage subsequent maintainers to keep this page up to date.<br />
<br />
As a convenience, [http://intertwingly.net/stories/2007/08/13/sanitize_lists.cgi this script] ([http://intertwingly.net/stories/2007/08/13/sanitize_lists.rb source]) converts these lists into a syntax shared by a number of common programming languages.<br />
<br />
=== Acceptable Elements ===<br />
<br />
* a<br />
* abbr<br />
* acronym<br />
* address<br />
* area<br />
* b<br />
* bdo<br />
* big<br />
* blockquote<br />
* br<br />
* button<br />
* caption<br />
* center<br />
* cite<br />
* code<br />
* col<br />
* colgroup<br />
* dd<br />
* del<br />
* dfn<br />
* dir<br />
* div<br />
* dl<br />
* dt<br />
* em<br />
* fieldset<br />
* font<br />
* form<br />
* h1<br />
* h2<br />
* h3<br />
* h4<br />
* h5<br />
* h6<br />
* hr<br />
* i<br />
* img<br />
* input<br />
* ins<br />
* kbd<br />
* label<br />
* legend<br />
* li<br />
* map<br />
* menu<br />
* ol<br />
* optgroup<br />
* option<br />
* p<br />
* pre<br />
* q<br />
* s<br />
* samp<br />
* select<br />
* small<br />
* span<br />
* strike<br />
* strong<br />
* sub<br />
* sup<br />
* table<br />
* tbody<br />
* td<br />
* textarea<br />
* tfoot<br />
* th<br />
* thead<br />
* tr<br />
* tt<br />
* u<br />
* ul<br />
* var<br />
* wbr<br />
<br />
==== mathml Elements ====<br />
<br />
* maction<br />
* math<br />
* merror<br />
* mfrac<br />
* mi<br />
* mmultiscripts<br />
* mn<br />
* mo<br />
* mover<br />
* mpadded<br />
* mphantom<br />
* mprescripts<br />
* mroot<br />
* mrow<br />
* mspace<br />
* msqrt<br />
* mstyle<br />
* msub<br />
* msubsup<br />
* msup<br />
* mtable<br />
* mtd<br />
* mtext<br />
* mtr<br />
* munder<br />
* munderover<br />
* none<br />
<br />
==== svg Elements ====<br />
<br />
* a<br />
* animate<br />
* animateColor<br />
* animateMotion<br />
* animateTransform<br />
* circle<br />
* defs<br />
* desc<br />
* ellipse<br />
* font-face<br />
* font-face-name<br />
* font-face-src<br />
* g<br />
* glyph<br />
* hkern<br />
* image<br />
* linearGradient<br />
* line<br />
* marker<br />
* metadata<br />
* missing-glyph<br />
* mpath<br />
* path<br />
* polygon<br />
* polyline<br />
* radialGradient<br />
* rect<br />
* set<br />
* stop<br />
* svg<br />
* switch<br />
* text<br />
* title<br />
* tspan<br />
* use<br />
<br />
=== Acceptable Attributes ===<br />
<br />
* abbr<br />
* accept<br />
* accept-charset<br />
* accesskey<br />
* action<br />
* align<br />
* alt<br />
* axis<br />
* border<br />
* cellpadding<br />
* cellspacing<br />
* char<br />
* charoff<br />
* charset<br />
* checked<br />
* cite<br />
* class<br />
* clear<br />
* cols<br />
* colspan<br />
* color<br />
* compact<br />
* coords<br />
* datetime<br />
* dir<br />
* disabled<br />
* enctype<br />
* for<br />
* frame<br />
* headers<br />
* height<br />
* href<br />
* hreflang<br />
* hspace<br />
* id<br />
* ismap<br />
* label<br />
* lang<br />
* longdesc<br />
* maxlength<br />
* media<br />
* method<br />
* multiple<br />
* name<br />
* nohref<br />
* noshade<br />
* nowrap<br />
* prompt<br />
* readonly<br />
* rel<br />
* rev<br />
* rows<br />
* rowspan<br />
* rules<br />
* scope<br />
* selected<br />
* shape<br />
* size<br />
* span<br />
* src<br />
* start<br />
* style<br />
* summary<br />
* tabindex<br />
* target<br />
* title<br />
* type<br />
* usemap<br />
* valign<br />
* value<br />
* vspace<br />
* width<br />
* xml:lang<br />
<br />
==== mathml Attributes ====<br />
<br />
* actiontype<br />
* align<br />
* columnalign<br />
* columnalign<br />
* columnalign<br />
* columnlines<br />
* columnspacing<br />
* columnspan<br />
* depth<br />
* display<br />
* displaystyle<br />
* equalcolumns<br />
* equalrows<br />
* fence<br />
* fontstyle<br />
* fontweight<br />
* frame<br />
* height<br />
* linethickness<br />
* lspace<br />
* mathbackground<br />
* mathcolor<br />
* mathvariant<br />
* mathvariant<br />
* maxsize<br />
* minsize<br />
* other<br />
* rowalign<br />
* rowalign<br />
* rowalign<br />
* rowlines<br />
* rowspacing<br />
* rowspan<br />
* rspace<br />
* scriptlevel<br />
* selection<br />
* separator<br />
* stretchy<br />
* width<br />
* width<br />
* xlink:href<br />
* xlink:show<br />
* xlink:type<br />
* xmlns<br />
* xmlns:xlink<br />
<br />
==== svg Attributes ====<br />
<br />
* accent-height<br />
* accumulate<br />
* additive<br />
* alphabetic<br />
* arabic-form<br />
* ascent<br />
* attributeName<br />
* attributeType<br />
* baseProfile<br />
* bbox<br />
* begin<br />
* by<br />
* calcMode<br />
* cap-height<br />
* class<br />
* color<br />
* color-rendering<br />
* content<br />
* cx<br />
* cy<br />
* d<br />
* dx<br />
* dy<br />
* descent<br />
* display<br />
* dur<br />
* end<br />
* fill<br />
* fill-rule<br />
* font-family<br />
* font-size<br />
* font-stretch<br />
* font-style<br />
* font-variant<br />
* font-weight<br />
* from<br />
* fx<br />
* fy<br />
* g1<br />
* g2<br />
* glyph-name<br />
* gradientUnits<br />
* hanging<br />
* height<br />
* horiz-adv-x<br />
* horiz-origin-x<br />
* id<br />
* ideographic<br />
* k<br />
* keyPoints<br />
* keySplines<br />
* keyTimes<br />
* lang<br />
* marker-end<br />
* marker-mid<br />
* marker-start<br />
* markerHeight<br />
* markerUnits<br />
* markerWidth<br />
* mathematical<br />
* max<br />
* min<br />
* name<br />
* offset<br />
* opacity<br />
* orient<br />
* origin<br />
* overline-position<br />
* overline-thickness<br />
* panose-1<br />
* path<br />
* pathLength<br />
* points<br />
* preserveAspectRatio<br />
* r<br />
* refX<br />
* refY<br />
* repeatCount<br />
* repeatDur<br />
* requiredExtensions<br />
* requiredFeatures<br />
* restart<br />
* rotate<br />
* rx<br />
* ry<br />
* slope<br />
* stemh<br />
* stemv<br />
* stop-color<br />
* stop-opacity<br />
* strikethrough-position<br />
* strikethrough-thickness<br />
* stroke<br />
* stroke-dasharray<br />
* stroke-dashoffset<br />
* stroke-linecap<br />
* stroke-linejoin<br />
* stroke-miterlimit<br />
* stroke-opacity<br />
* stroke-width<br />
* systemLanguage<br />
* target<br />
* text-anchor<br />
* to<br />
* transform<br />
* type<br />
* u1<br />
* u2<br />
* underline-position<br />
* underline-thickness<br />
* unicode<br />
* unicode-range<br />
* units-per-em<br />
* values<br />
* version<br />
* viewBox<br />
* visibility<br />
* width<br />
* widths<br />
* x<br />
* x-height<br />
* x1<br />
* x2<br />
* xlink:actuate<br />
* xlink:arcrole<br />
* xlink:href<br />
* xlink:role<br />
* xlink:show<br />
* xlink:title<br />
* xlink:type<br />
* xml:base<br />
* xml:lang<br />
* xml:space<br />
* xmlns<br />
* xmlns:xlink<br />
* y<br />
* y1<br />
* y2<br />
* zoomAndPan<br />
<br />
=== CSS Rules ===<br />
<br />
First <code>urls</code> matching the following regular expression are removed:<br />
<pre>url\s*\(\s*[^\s)]+?\s*\)\s*</pre><br />
<br />
The style strings that don't match the following are deemed obfuscated, and ignored entirely:<br />
<pre>^([:,;#%.\sa-zA-Z0-9!]|\w-\w|'[\s\w]+'|"[\s\w]+"|\([\d,\s]+\))*$</pre><br />
<pre>^(\s*[-\w]+\s*:\s*[^:;]*(;|$))*$</pre><br />
<br />
==== style Properties ====<br />
<br />
* azimuth<br />
* background, background-*<br />
* border, border-*<br />
* clear<br />
* color<br />
* cursor<br />
* direction<br />
* display<br />
* elevation<br />
* float<br />
* font<br />
* font-family<br />
* font-size<br />
* font-style<br />
* font-variant<br />
* font-weight<br />
* height<br />
* letter-spacing<br />
* line-height<br />
* margin, margin-*<br />
* overflow<br />
* padding, padding-*<br />
* pause<br />
* pause-after<br />
* pause-before<br />
* pitch<br />
* pitch-range<br />
* richness<br />
* speak<br />
* speak-header<br />
* speak-numeral<br />
* speak-punctuation<br />
* speech-rate<br />
* stress<br />
* text-align<br />
* text-decoration<br />
* text-indent<br />
* unicode-bidi<br />
* vertical-align<br />
* voice-family<br />
* volume<br />
* white-space<br />
* width<br />
<br />
==== style Property Values ====<br />
<br />
* auto<br />
* aqua<br />
* black<br />
* block<br />
* blue<br />
* bold<br />
* both<br />
* bottom<br />
* brown<br />
* center<br />
* collapse<br />
* dashed<br />
* dotted<br />
* fuchsia<br />
* gray<br />
* green<br />
* !important<br />
* italic<br />
* left<br />
* lime<br />
* maroon<br />
* medium<br />
* none<br />
* navy<br />
* normal<br />
* nowrap<br />
* olive<br />
* pointer<br />
* purple<br />
* red<br />
* right<br />
* solid<br />
* silver<br />
* teal<br />
* top<br />
* transparent<br />
* underline<br />
* white<br />
* yellow<br />
<br />
In addition, values that match the following regular expression are valid:<br />
<br />
<code>^(#[0-9a-f]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|\d{0,2}\.?\d{0,2}(cm|em|ex|in|mm|pc|pt|px|%|,|\))?)$</code><br />
<br />
==== svg style Properties ====<br />
<br />
* fill<br />
* fill-opacity<br />
* fill-rule<br />
* stroke<br />
* stroke-width<br />
* stroke-linecap<br />
* stroke-linejoin<br />
* stroke-opacity<br />
<br />
=== URIs ===<br />
==== Attributes whose value is a URI ====<br />
<br />
* href<br />
* src<br />
* cite<br />
* action<br />
* longdesc<br />
* xlink:href<br />
* xml:base<br />
<br />
==== URI schemes ====<br />
<br />
* afs<br />
* aim<br />
* callto<br />
* data (see [[#Safe data URL content types]])<br />
* ed2k<br />
* feed<br />
* ftp<br />
* gopher<br />
* http<br />
* https<br />
* irc<br />
* mailto<br />
* news<br />
* nntp<br />
* rsync<br />
* rtsp<br />
* sftp<br />
* ssh<br />
* tag<br />
* tel<br />
* telnet<br />
* urn<br />
* webcal<br />
* wtai<br />
* xmpp<br />
<br />
==== Safe data URL content types ====<br />
Note: This section is being [http://wiki.whatwg.org/wiki/Talk:Sanitization_rules discussed].<br />
* text/plain<br />
* image/gif<br />
* image/jpeg<br />
* image/png<br />
<br />
==Related Links==<br />
<br />
[http://www.cellulite.co.uk/advice/spa-treatment/mesotherapy '''mesotherapy''']</div>
Demver5