Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C liability, trademark and document use rules apply.
TTML 1.0 provides many features to satisfy captioning and subtitling requirements, not all of which are intended for end user display. Requirements have been identified by key video and content communities to define an interoperable delivery profile using the core features specifically designed for online presentation of TTML. Such a profile allows the community of TTML users to construct constrained presentation engines for TTML. This document defines the behavior expected of a presentation processor using the player constraints for such an online delivery profile.
The Simple Online Delivery profile is focused on streamlined delivery of closed captions on the Internet. This interoperability profile supports core TTML features to deliver content originating legacy formats such as CEA-608 and -708 content, and is targeted primarily for delivery in US markets.
The Simple Delivery Profile for Closed Captions focuses interoperability using TTML 1.0 to support delivery of closed captions for video content. Other profiles based on TTML 1.0 may target other types of subtitles such as on-screen text or graphics. This interoperability profile is a proper subset of TTML 1.0 plus features required to support US Government closed captioning requirements for online presentation.
This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at http://www.w3.org/TR/.
This is the first Public Working Draft of the Simple Delivery Profile for Closed Captions (US).
This document applies 3 guiding principles for online delivery of closed captions in the United States:
This document was published by the Timed Text Working Group as a Working Draft and is intended to become a Working Group Note. If you wish to make comments regarding this document, please send them to public-tt@w3.org (subscribe, archives). All feedback is welcome.
Publication as a Working Draft does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.
This document was produced by a group operating under the 5 February 2004 W3C Patent Policy. The group does not expect this document to become a W3C Recommendation. W3C maintains a public list of any patent disclosures made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains Essential Claim(s) must disclose the information in accordance with section 6 of the W3C Patent Policy.
As well as sections marked as non-normative, all authoring guidelines, diagrams, examples, and notes in this specification are non-normative. Everything else in this specification is normative.
The key words must, must not, required, should, should not, recommended, may, and optional in this specification are to be interpreted as described in [RFC2119].
This profile identifies the content and player constraints for closed captioning using TTML. To conform to this profile, a presentation engine must:
This constrained profile enumerates a set of required TTML features, some of which may be constrained in behavior, and the capabilities required of a Presentation Processor in TTML 1.0. The semantics defined in TTML 1.0 apply unless otherwise constrained in this profile. Claims of conformance must use this URI and implement the required features and constraints of use and processing outlined in this profile.
Name | Designator |
---|---|
simple-delivery | http://www.w3.org/ns/ttml/profile/online-delivery |
Conformance to this profile does not preclude the use of other features defined in TTML 1.0 but such behavior is not defined here.
The terms and definitions in TTML 1.0 serve as the basis for this interoperability profile. Terms found here are in addition to those found in TTML 1.0.
Name | Definition |
---|---|
Required feature | A TTML feature is required for use. |
Required feature with constraints | A TTML feature is required but constrained by this profile for use and/or processing. |
Optional feature | Any TTML feature not included in this profile. |
This profile represents a minimum set of required functionality using specified TTML features to deliver closed captions for online-delivery. This profile does not preclude optional features from use.
The functionality is described in how it constrains the use of TTML features and how a processor provides those captions. An example implementing this constrained profile exists in Profile designator; error handling behavior is found in Error Handling.
This profile identifies functionality in the context of the required TTML 1.0 features used and applies constraints. Each function is defined by:
The template is as follows:
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
Processors must support the capability to present documents where the following constraints apply:
<span style="s1">A</span> <span style="s3">B</span> <span style="s1">C</span>
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#core | required |
None
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#content | Required with constraint | Specified elements are used. |
Processors must support the capability to present documents where the following constraints apply:
tt
head
body
div
p
span
br
set
layout
styling
region
style
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#presentation | required |
None
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#profile | required |
NOTE: See also Conformance
NOTE: The use attribute could indicate the geographical region for which the profile is used. For example, specific styling capabilities could be used in a particular geographical region. See also Other Constraints.
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#structure | required |
None
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#backgroundColor-block #backgroundColor-inline |
Required with constraints | p element region element |
Processors must support the capability to present documents where the following constraints apply:
Note: These colors are identical to those identified in the CEA708-D, Section 8.8 [RBG resolution of 4 bits for each primary (03)].
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#color | Required with constraints |
Processors must support the capability to present documents where the following constraints apply:
Note: These colors are identical to those identified in the CEA708-D, Section 8.8 [RBG resolution of 4 bits for each primary (03)].
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#display-region | required |
None
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#display-region | Required with constraints | region root |
Examples are provided of each style to aid in understanding the common forms.
<tt xml:lang="en-us" xmlns="http://www.w3.org/ns/ttml" xmlns:s='http://www.w3.org/ns/ttml#styling' xmlns:p='http://www.w3.org/ns/ttml#parameter' > <head> <p:profile use="http://www.w3.org/ns/ttml/profile/online-delivery"/> <styling> <!-- A typical transparent region with centered text that has an outline --> <style xml:id="bottomMidStyle" s:textAlign="center" s:textOutline="#000000ff 5%" s:backgroundColor="#00000000" s:color="#ffffffff" s:origin='20% 58%' s:extent='60% 18%'/> </styling> <layout> <!-- typical 'pop on' type region --> <region xml:id="bottomMid" style="bottomMidStyle" /> </layout> </head> <body> <div style="defaultFont"> <p region="bottomMid" begin='00:00:00.101' end='00:00:03.000'> This is a pop on caption. </p> </div> </body> </tt>
<style xml:id="bottomMidStyle" s:textAlign="center" s:textOutline="black 1px" s:backgroundColor="transparent" s:color="white" s:origin='20% 58%' s:extent='60% 18%'/> <style xml:id="topMidStyle" s:textAlign="center" s:textOutline="black 1px" s:backgroundColor="transparent" s:color="white" s:origin='20% 10%' s:extent='60% 18%'/>
<?xml version="1.0" encoding="utf-8"?> <tt xml:lang="en-us" xmlns="http://www.w3.org/ns/ttml" xmlns:s='http://www.w3.org/ns/ttml#styling'> <head> <styling> <style xml:id="s1" s:display="none" s:extent='40% 18%'/> </styling> <layout> <region xml:id="r1" style="s1"> <set begin='00:00:10.000' end='00:00:12.000' s:display='auto'/> <set begin='00:00:10.000' end='00:00:12.000' s:origin='10% 10%'/> <set begin='00:00:11.670' end='00:00:12.000' s:display='auto'/> <set begin='00:00:11.670' end='00:00:12.000' s:origin='10% 10%'/> </region> <region id="r2" style="s2"> <set begin='00:00:10.330' end='00:00:10.670' s:display='auto'/> <set begin='00:00:10.330' end='00:00:10.670' s:origin='50% 10%'/> <set begin='00:00:11.670' end='00:00:12.000' s:display='auto'/> <set begin='00:00:11.670' end='00:00:12.000' s:origin='50% 10%'/> </region> <region id="r3" style="s3"> <set begin='00:00:10.670' end='00:00:11.000' s:display='auto'/> <set begin='00:00:10.670' end='00:00:11.000' s:origin='10% 78%'/> <set begin='00:00:11.670' end='00:00:12.000' s:display='auto'/> <set begin='00:00:11.670' end='00:00:12.000' s:origin='10% 78%'/> </region> <region id="r4" style="s4"> <set begin='00:00:11.000' end='00:00:11.330' s:display='auto'/> <set begin='00:00:11.000' end='00:00:11.330' s:origin='50% 78%'/> <set begin='00:00:11.670' end='00:00:12.000' s:display='auto'/> <set begin='00:00:11.670' end='00:00:12.000' s:origin='50% 78%'/> </region> </layout> </head> <body> <div> <!--four speakers count off, and then all call 'Jump' together --> <p begin='00:00:10.000' end='00:00:10.330' region="r1" >One</p> <p begin='00:00:10.330' end='00:00:10.670' region="r2" >Two</p> <p begin='00:00:10.670' end='00:00:11.000' region="r3">Three</p> <p begin='00:00:11.000' end='00:00:11.330' region="r4" >Four</p> <p begin='00:00:11.670' end='00:00:12.000' region="r1" >Jump!</p> <p begin='00:00:11.670' end='00:00:12.000' region="r2" >Jump!</p> <p begin='00:00:11.670' end='00:00:12.000' region="r3">Jump!</p> <p begin='00:00:11.670' end='00:00:12.000' region="r4" >Jump!</p> </div> </body> </tt>
<p region='rollup' begin='00:00:13.000' dur='00:00:11.000'> <span begin='00:00:01.000'>rollup</span> <span begin='00:00:02.000'>style</span> <span begin='00:00:03.000'>caption</span> <span begin='00:00:04.000'>support</span> </p> <p region='rollup' begin='00:00:17.000' dur='00:00:11.000'> <span begin='00:00:01.000'>with</span> <span begin='00:00:02.000'>word</span> <span begin='00:00:03.000'>at</span> <span begin='00:00:04.000'>a</span> <span begin='00:00:05.000'>time</span> <span begin='00:00:06.000'>temporal</span> </p> <p region='rollup' begin='00:00:23.000' dur='00:00:11.000'> <span begin='00:00:01.000'>placement</span> <span begin='00:00:02.000'>this</span> <span begin='00:00:03.000'>could</span> <span begin='00:00:04.000'>go</span> </p> <p region='rollup' begin='00:00:27.000' dur='00:00:11.000'> <span begin='00:00:01.000'>on</span> <span begin='00:00:02.000'>all</span> <span begin='00:00:03.000'>day</span> </p>
Note: As shown in the rollup example, a function of time for a k line rollup of content: The begin time of the N+kth p element is equal to the begin time plus duration of the Nth p element less the begin time of the first span in the N+kth p.
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#fontFamily-generic | Required with constraints | tts:fontFamily attribute | span |
Processors must support the capability to present documents where the following constraints apply:
Note: fontFamily values that do not not correspond to generic font family names in TTML 1.0, such as casual
, cursive
and smallcaps
, may be used. These are to be interpreted as local font names, which, if not available, the default
font family is to be used.
Style Value | Description | Comments |
---|---|---|
default | default | One of the below |
monospace | Serif Monospaced with serifs | Similar to Courier |
proportional | Serif Proportionally spaced with serifs | Similar to Times New Roman |
monospaceSansSerif | Monospaced without serifs | Similar to Helvetica Monospaced |
proportionalSansSerif | Proportionally spaced without serifs | Similar to Arial and Swiss |
casual | Casual font type | Similar to Dom and Impress |
cursive | Cursive font type | Similar to Coronet and Marigold |
smallcaps | Smallcap types | Similar to Engravers Gothic |
Note: Player and Unicode code point support is defined in Code Point support
Note: Text outline can be specified using a style property to apply to characters selected for specific areas for content flowed into a region. Text outline applies a specific character edge to content. For example, when the textOutline style property is used, a type of shadow or thickness can be applied to content.
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#fontSize | Required with constraints | span div (root) |
Processors must support the capability to present documents where the following constraints apply:
Note: Use of a fontSize of less than 75% (i.e. 50%) could result in unreadable content for a user.
Note: Specifying a fontSize is used for a document could allow the user to select a preferred fontSize.
Note: This is equivalent to one cell using the default grid. A player is however not required to support the grid metric.
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#fontStyle-italic | Required with constraints | span | span | Support 7 font family values. |
Processors must support the capability to present documents where the following constraints apply:
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#length-percentage | Required |
None
<style xml:id="topLeftStyle" s:fontSize="150%" s:textAlign="left" s:backgroundColor="#ffffffff" s:color="#ff0000ff" s:origin='10% 10%' s:extent='40% 18%'/>
Convert the percentage value to a fraction (i.e. .40), multiply the numerator by 16 and divide by 100 to obtain px (pixel units).
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#length-positive | Required |
None
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#styling #styling-referential #styling-inline |
Required with constraints |
Processors must support the capability to present documents where the following constraints apply:
Note: The constraints in this section result in a document that contains style blocks that are complete and self-contained.
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#styling-inheritance-content | Required |
None
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#styling-inheritance-region | Required |
None
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#textAlign-absolute | Required |
None
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#textDecoration-under | Required with Constraints |
Processors must support the capability to present documents where the following constraints apply:
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#textOutline-unblurred | Required with Constraints |
Processors must support the capability to present documents where the following constraints apply:
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#writingMode-horizontal-lr | Required |
None
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#layout | Required with constraints | region attribute | content |
Processors must support the capability to present documents where the following constraints apply:
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#lineBreak-uax14 | Required with constraints |
Processors must support the capability to present documents where the following constraints apply:
NOTE: The style properites of region and the content selected for the region impact how selected text flows into a region (i.e. selected text may flow outside of the region such as on a mobile device).
NOTE: Constraining one p element to a region logically places content from two different speakers to different region(s).
NOTE: When a document author wants to construct a single phrase from a speaker with more than one line in a region, the br within a p element can be used. This construction adheres to the constraints in this section. For example for one speaker with more than one line:
<p> I always get the fuzzy end<br/>of the lollipop</p>
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#timing | Required with constraints |
Processors must support the capability to present documents where the following constraints apply:
Note: The use of dur on a span supports rollup style content. For content other than rollup, the default behavior is to remain present until the end of the container. Therefore, durations are not needed on the span element.
<p begin='00:00:01.000' end='00:00:11.123' region="r1" >Test</p>
<p begin='00:00:01:00' end='00:00:11:22' region="r1" >Test</p>
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#time-offset #time-offset-with-frames |
Required |
None
Note: Since the ttp:timebase attribute is outside of this profile, the implicit timebase used here is media as specified in TTML 1.0.
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#frameRate #frameRateMultiplier |
Required |
See timing
TTML Feature | Usage type | Context of Usage | Scope | Constraint |
---|---|---|---|---|
#animation | Required with constraints |
Processors must support the capability to present documents where the following constraints apply:
Note: Animation is constrained to the scenarios where the region needs to be moved – i.e. when the “snap” display effect is required.
Note: Animation is constrained to the scenarios to change the foreground color of content when flashing text is required.
Constraints on reduced or simplified content are outside of this profile. External labeling could be used to support the user’s capability to select and use captions when available for:
For example, external labeling could be used to identify simplified or reduced, or other language supported content on a text track in HTML5. Such labeling may also be used to identify when large font size is applied to content. Requirements to support user preview and retention of default or user defined settings of selected text are outside of the scope of this profile. These requirements are relevant in the environment to which the captions are deployed.
<?xml version="1.0" encoding="utf-8"?> <?xml version="1.0" encoding="utf-8"?> <profile xmlns="http://www.w3.org/ns/ttml#parameter"> <features xml:base="http://www.w3.org/ns/ttml/feature/"> <!-- required (mandatory) feature support --> <feature value="required">#animation</feature> <feature value="required">#backgroundColor-block</feature> <feature value="required">#backgroundColor-inline</feature> <feature value="required">#color</feature> <feature value="required">#content</feature> <feature value="required">#core</feature> <feature value="required">#display-region</feature> <feature value="required">#fontFamily-generic</feature> <feature value="required">#fontSize</feature> <feature value="required">#fontStyle-italic</feature> <feature value="required">#frameRate</feature> <feature value="optional">#frameRateMultiplier</feature> <feature value="required">#layout</feature> <feature value="required">#length-percentage</feature> <feature value="required">#length-positive</feature> <feature value="required">#lineBreak-uax14</feature> <feature value="required">#presentation</feature> <feature value="required">#profile</feature> <feature value="required">#structure</feature> <feature value="required">#styling</feature> <feature value="required">#styling-inheritance-content</feature> <feature value="required">#styling-inheritance-region</feature> <feature value="required">#styling-inline</feature> <feature value="required">#styling-referential</feature> <feature value="required">#textAlign-absolute</feature> <feature value="required">#textDecoration-under</feature> <feature value="required">#textOutline-unblurred</feature> <feature value="required">#time-offset</feature> <feature value="required">#time-offset-with-frames</feature> <feature value="required">#timing</feature> <feature value="required">#writingMode-horizontal-lr</feature> </features> </profile>
A presentation process may be presented with documents that contain features that are not understood. The table that follows outlines the behavior expected under specific conditions. The pre-requisite if the caption file is syntactically valid XML.
Feature | Requirement | Action |
---|---|---|
Known | Required | must interpret |
Unknown | Required | must ignore |
The casual, cursive and smallcap styles could be considered for addition to <genericFamilyName> expression in a future version of TTML.
A key is provided that maps the US Government technical requirements for closed captions are mapped to the constrained features of this profile.
Presentation | #animation (set) #display-region #extent-region #frameRate #frameRateMultiplier #layout #length-percentage #length-positive #lineBreak-uax14 #textAlign-absolute #time-offset #time-offset-with-frames #timing #writingMode-lr |
Character color | #animation #color |
Character opacity | #color |
Character size | #fontSize #fontStyle-italic #textDecoration-underline |
Fonts | #fontFamily-generic #fontStyle-italic |
Caption background color and opacity | #backgroundColor-* |
Character edge attributes | #textOutline-unblurred |
Caption window color | #backgroundColor-* |
Language | #profile |
Preview setting and retention | See Other Constraints, |
TTML Mandatory Features
TTML Features Required That Support Other Requirements
_0 | _1 | _2 | _3 | _4 | _5 | _6 | _7 | _8 | _9 | _A | _B | _C | _D | _E | _F | |
! | " | # | $ | % | & | ' | ( | ) | * | + | , | - | . | / | ||
U+002_ | 0020 | 0021 | 0022 | 0023 | 0024 | 0025 | 0026 | 0027 | 0028 | 0029 | 002A | 002B | 002C | 002D | 002E | 002F |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | : | ; | < | = | > | ? | |
U+003_ | 0030 | 0031 | 0032 | 0033 | 0034 | 0035 | 0036 | 0037 | 0038 | 0039 | 003A | 003B | 003C | 003D | 003E | 003F |
@ | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | |
U+004_ | 0040 | 0041 | 0042 | 0043 | 0044 | 0045 | 0046 | 0047 | 0048 | 0049 | 004A | 004B | 004C | 004D | 004E | 004F |
P | Q | R | S | T | U | V | W | X | Y | Z | [ | \ | ] | ^ | _ | |
U+005_ | 0050 | 0051 | 0052 | 0053 | 0054 | 0055 | 0056 | 0057 | 0058 | 0059 | 005A | 005B | 005C | 005D | 005E | 005F |
` | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | |
U+006_ | 0060 | 0061 | 0062 | 0063 | 0064 | 0065 | 0066 | 0067 | 0068 | 0069 | 006A | 006B | 006C | 006D | 006E | 006F |
p | q | r | s | t | u | v | w | x | y | z | { | | | } | ~ | ♪ | |
U+007_ | 0070 | 0071 | 0072 | 0073 | 0074 | 0075 | 0076 | 0077 | 0078 | 0079 | 007A | 007B | 007C | 007D | 007E | 007F |
¡ | ¢ | £ | ¤ | ¥ | ¦ | § | ¨ | © | ª | « | ¬ | | ® | ¯ | ||
U+00A_ | 00A0 | 00A1 | 00A2 | 00A3 | 00A4 | 00A5 | 00A6 | 00A7 | 00A8 | 00A9 | 00AA | 00AB | 00AC | 00AD | 00AE | 00AF |
° | ± | ² | ³ | ´ | µ | ¶ | · | ¸ | ¹ | º | » | ¼ | ½ | ¾ | ¿ | |
U+00B_ | 00B0 | 00B1 | 00B2 | 00B3 | 00B4 | 00B5 | 00B6 | 00B7 | 00B8 | 00B9 | 00BA | 00BB | 00BC | 00BD | 00BE | 00BF |
À | Á | Â | Ã | Ä | Å | Æ | Ç | È | É | Ê | Ë | Ì | Í | Î | Ï | |
U+00C_ | 00C0 | 00C1 | 00C2 | 00C3 | 00C4 | 00C5 | 00C6 | 00C7 | 00C8 | 00C9 | 00CA | 00CB | 00CC | 00CD | 00CE | 00CF |
Ð | Ñ | Ò | Ó | Ô | Õ | Ö | × | Ø | Ù | Ú | Û | Ü | Ý | Þ | ß | |
U+00D_ | 00D0 | 00D1 | 00D2 | 00D3 | 00D4 | 00D5 | 00D6 | 00D7 | 00D8 | 00D9 | 00DA | 00DB | 00DC | 00DD | 00DE | 00DF |
à | á | â | ã | ä | å | æ | ç | è | é | ê | ë | ì | í | î | ï | |
U+00E_ | 00E0 | 00E1 | 00E2 | 00E3 | 00E4 | 00E5 | 00E6 | 00E7 | 00E8 | 00E9 | 00EA | 00EB | 00EC | 00ED | 00EE | 00EF |
ð | ñ | ò | ó | ô | õ | ö | ÷ | ø | ù | ú | û | ü | ý | þ | ÿ | |
U+00F_ | 00F0 | 00F1 | 00F2 | 00F3 | 00F4 | 00F5 | 00F6 | 00F7 | 00F8 | 00F9 | 00FA | 00FB | 00FC | 00FD | 00FE | 00FF |
Œ | œ | |||||||||||||||
U+015_ | 0152 | 0153 | ||||||||||||||
Š | š | |||||||||||||||
U+016_ | 0160 | 0161 | ||||||||||||||
Ÿ | Ž | ž | ||||||||||||||
U+017_ | 0178 | 017D | 017E | |||||||||||||
ƒ | ||||||||||||||||
U+019_ | 0192 | |||||||||||||||
˜ | ||||||||||||||||
U+02D_ | 02DC | |||||||||||||||
‐ | ― | ‖ | ||||||||||||||
U+201_ | 2010 | 2015 | 2016 | |||||||||||||
‧ | ||||||||||||||||
U+202_ | 2027 | |||||||||||||||
‰ | › | |||||||||||||||
U+203_ | 2030 | 203A | ||||||||||||||
₡ | ₢ | € | ||||||||||||||
U+20A_ | 20A1 | 20A2 | 20AC | |||||||||||||
₳ | ||||||||||||||||
U+20B_ | 20B3 | |||||||||||||||
°C | °F | |||||||||||||||
U+210_ | 2103 | 2109 | ||||||||||||||
⅓ | ⅟ | |||||||||||||||
U+215_ | 2153 | 215F | ||||||||||||||
□ | ||||||||||||||||
U+25A_ | 25A1 | |||||||||||||||
♩ | ♫ | |||||||||||||||
U+266_ | 2669 | 266B |
For color values of the form #rrggbbaa, players must support combinations where the rr, gg, bb components may be either 00 or ff; and the aa component may be 00, 54, A8 or FF. e.g: #00ffff54. Additionally players should support values for rr, gg, and bb of 54 or A8, and may support all possible values between 00 to ff.
Color | Value |
---|---|
Black | #000000ff |
White | #fffffffff |
Red | #ff0000ff |
Green | #00ff00ff |
Blue | #0000ffff |
Yellow | #ffff00ff |
Magenta | #ff00ffff |
Cyan | #00ffffff |
Many thanks to Robin Berjon for providing the respec.js tool used to format this document.
No informative references.