Regulation On The Creation Of Barrier-Free Information Technology According To The Disability Equality Act

Original Language Title: Verordnung zur Schaffung barrierefreier Informationstechnik nach dem Behindertengleichstellungsgesetz

Read the untranslated law here: http://www.gesetze-im-internet.de/bitv_2_0/BJNR184300011.html

Regulation on the creation of barrier-free information technology according to the Disability Equality Act (barrier-free information technology regulation - BITV 2.0) BITV 2.0 copy date: 12.09.2011 full quotation: "barrier-free information technology regulation by September 12, 2011 (BGBl. I S. 1843)" footnote (+++ text detection from: 22.9.2011 +++) input formula on the basis of § 11 paragraph 1 sentence 2 of the disability equality act, most recently by article 12 of the law of December 19, 2007 (BGBl. I S. 3024) is changed, ordered the Federal Ministry of labour and Social Affairs : § 1 scope the regulation applies to the following activities of the authorities of the Swiss Confederation: 1 websites and offers, 2 in TRANS baptism kicks and deals that are available to the public, and 3 by means of information technology realized graphical program interfaces that are accessible to the public.

Section 2 to include groups of disabled people making the offers referred to in § 1 of the information technology is intended people in the meaning of § 3 of the disability equality act, the use of information technology is without the fulfillment of additional conditions possible only to a limited extent, to open access to the disabled.

§ 3 applicable standards (1) are the offers referred to in § 1 of the information technology to ensure that all offers comply with the conditions and requirements listed under priority I according to Appendix 1. Continue to central navigation and entry-level positions should take into account also the requirements listed under priority II and conditions.
(2) on the home page of the Internet or Intranetangebotes (section 1 number 1 and 2) a public authority within the meaning of § 7 paragraph 1 sentence 1 of the Disability Equality Act are to provide following explanations in German sign language and in easier language in annex 2: 1 information about the contents, 2. instructions for navigation and 3 references to more existing in this site in German sign language or in easier language.
The requirements and conditions of Appendix 1 shall remain unaffected.

§ To create 4 implementation periods for standards (1) are the offers referred to in § 1, which will be redesigned or changed in fundamental elements or larger scale or adapted, until March 22, 2012 according to § 3. At least one access path to the above offers to meet the requirements and conditions of the priority I of Appendix 1 with the activation of these offers.
(2) offers are number 1 and 2, which set 1 date referred to have been published before in paragraph 1, referred to in paragraph 1 no later than September 22, 2012, according to § 3 paragraph 1 to make. You are to make in addition no later than March 22, 2014, pursuant to article 3, paragraph 2.
(3) referred to in paragraph 2 the barrier-free information technology regulation of 17 July 2002 applies offers to the implementation within the meaning of paragraphs 1 and 2 (Federal Law Gazette I p. 2654) continued.

§ To check 5 impact assessment (1) that is regulation, taking into account the technical development. It will be verified at the latest three years after its entry into force on their effect.
(2) effect and necessity of tenders referred to in article 3, paragraph 2 shall be checked at the latest three years after its entry into force.

Article 6 entry into force, expiry this regulation enter into force on the day after the announcement. At the same time the barrier-free information technology regulation of 17 July 2002 (Federal Law Gazette I p. 2654) override.

Appendix 1 (to article 3 and article 4, paragraph 1) (reference: Federal Law Gazette I 2011, 1845 - 1858) priority I principle 1: visibility - the information and components of the user interface are to represent, can be perceived by users and users.
Alternatives in the form of text are requirement 1.1 for any non-text content to deploy, which can be adapted to the needs of users.
Condition 1.1.1 non-text content for every non-text content, which is presented to the user or the user, is to provide a text alternative that serves the purpose of this content.
Text alternatives must be deployed in the following cases: - there is a control element, or an element that accepts input from the user or the user's, and it is an identifier that describes its purpose.
-It is time-controlled media and text alternatives that contain at least a descriptive statement of the non-text content.
-It's test or exercise that must be presented in non-text format, and text alternatives that contain at least a descriptive statement of the non-text content, are available.
-It should be effected certain sensory experiences and text alternatives that contain at least a descriptive statement of the non-text content, are available.
-It should be reached that accesses a computer, but a person on the contents and the non-text content is explained and described with text alternatives and alternative CAPTCHAs with different output mode for different types of sensory perception are provided.
-It is purely decorative elements or items that serve only the Visual design, or the non-text content is not visible to the user or the user, and these elements are set up so that they can be ignored by assistive technologies.
Requirement 1.2 for time-controlled media are to provide alternatives.
Conditions 1.2.1 recorded audio and video files for pure recorded audio and pure video files that are not already own a media alternative for text and is clearly marked as such, the following must be provided: - for content of the recorded audio files: text alternatives with equivalent information - content of the recorded video files: alternate text or an audio track with equivalent information.
1.2.2 are advanced subtitles (captions) for recorded audio content from synchronized media to provide advanced subtitles (captions). This shall not apply in the case of media alternatives to text that are clearly marked as such.
1.2.3 audio description or full text alternative for recorded synchronized media is to provide a full text alternative including any interaction or an audio description. This shall not apply in the case of media alternatives to text that are clearly marked as such.
1.2.4 live captions for live synchronized media broadcasts are to provide all audio content as advanced subtitles (captions).
1.2.5 audio description for all prerecorded video content in synchronized media is to provide an audio description. This shall not apply in the case of media alternatives to text that are clearly marked as such.
1.3 content are requirements to such a way that they can be presented without information or structure loss in different ways.
Conditions 1.3.1 info and relationships are all information, structures and relationships that are mediated by layout and presentation, through programs recognizable or the text available.
1.3.2 meaningful sequence if the order in which content is presented affects its meaning, is the correct reading order by programs clearly.
1.3.3 sensory characteristics instructions for the understanding and the use of the content be based not solely on sensory characteristics of elements such as such as shape, size, Visual placement, orientation, or sound.
Requirement is 1.4 users and users as far as possible to facilitate the perception of the content and the distinction between foreground and background.
Conditions 1.4.1 color is color rather than use only means to convey information, to display an action, to cause a reaction or to mark a visual element.
1.4.2 audio control for sound elements that are played automatically for more than three seconds on a Web page, are there - either a mechanism to suspend or stop the sound or - a mechanism for regulating the volume regardless of the system volume.
1.4.3 contrast in the Visual presentation of text and font graphics is the contrast between foreground and background color at least 4.5: 1. A contrast ratio of at least 3:1 is true for uppercase and uppercase font graphics. No minimum contrast is required for minor text and font graphics - are part of an inactive user interface component, - which are purely decorative, are incidental text in an image or - which are not visible to the user or the user.
No minimum contrast requirements also apply to text that is part of a logo or brand name.
1.4.4 changeable text size of text can be without assistive technology up to 200%, without causing a loss of content or functionality.
1.4.5 font graphics are no font graphics for communicating information to use, unless, they can adapt individually to the Visual needs of the user or the user's or - a specific presentation is essential for communicating the details of the text.
Principle 2: usability - user interface components and navigation must be controlled.
Request 2.1 for the entire functionality is to ensure accessibility of the keyboard.
Conditions
2.1.1 keyboard usability all functionality of the content can be operated through a keyboard interface, without any specific timelines for the individual keystrokes must be observed. This does not apply if the underlying function requires input that depend on not only the endpoints, but also the history of the user movement.
2.1.2 no keyboard trap the keyboard focus can be moved by using a keyboard interface on a page element, must be the focus of this element via the keyboard interface away can be moved. Are for this purpose more than the standard, arrow or tab keys required are the users and users to know which method of focus can be moved away.
Request and the perception and 2.2 is to give sufficient time to read and use content.
Conditions 2.2.1 time-based requirements for each time limit that is specified in content, must be at least one of the following be given:-the time limit must be off before the time runs out.
-The time limit can be changed within a time frame that is at least ten times of the default setting.
-The user or the user is warned that time is running out, and has time to prolong by a simple action (for example, by pressing the space bar) then at least 20 seconds. This possibility is at least ten times the user or the user.
It is not necessary to adjust the time limit, if - the time limit is a required part of a real-time event (for example, an auction), and there is no alternative to the time limit laid down, - the time limit is necessary and by extension, the activity would be invalid or - the time frame is longer than 20 hours.
2.2.2 pause, stop, hide information, moving, blinking or scrolling and that - automatically insert, - longer than take five seconds and - at the same time presented with other content must paused, stopped or hide can, unless this movement is essential for an activity.
Information that automatically update itself and which automatically insert and - presented at the same time with other content must be paused, stopped, hidden controls in their update frequency can be or unless this automatic update is essential for an activity.
2.3 content are request to ensure that no epileptic seizures are triggered.
Triple Flash - falling below the thresholds of Web pages contain no items that unless within a period of one second more often than three times Flash, condition 2.3.1 unless the Flash is located below the "general flash" - or "red flash" - the threshold.
Orientation and navigation AIDS, as well as AIDS to find content to provide are request 2.4 of the user or the user.
Conditions 2.4.1 bypass groups of groups of elements that are repeated on multiple Web pages are mechanisms available to avoid this.
2.4.2 contain titles which describe the topic or the purpose of the page Web pages Web pages title.
2.4.3 focus order if the navigation sequence does affect meaning or operation of the Web site, focusable components receive focus in the order which ensures that the importance and ease of use are preserved.
2.4.4 purpose a link (in context) are the purpose of a link from the link text itself can be seen, or from the link text in connection with the link context specific programmes.
2.4.5 alternative access routes are offered alternative ways to find content and Web pages within related websites. This does not apply to pages that can be reached only by a specific procedure.
2.4.6 feature descriptions, headings and labels (captions) the subject or the purpose.
2.4.7 visible focus for keyboard operation is always a keyboard focus visible.
2.4.8 location's information on the location of the user or users within the Web page, as well as within related websites are available.
Principle 3: Intelligibility - information and the operation of user interface must be understandable.
3.1 texts are request to make readable and understandable.
Conditions 3.1.1 language the predominantly used natural language of each Web page is recognizable by programs.
3.1.2 language of individual sections of the natural language of all used text passages or phrases is recognizable by programs.
3.2 Web pages are request to ensure that construction and use are predictable.
Conditions 3.2.1 when focusing a component receives focus, no change of context is raised as a result.
3.2.2 on input to change the setting of an element of the user interface, does not automatically cause a change of context, unless the user or the user has been informed prior to use of the element of this behavior.
3.2.3 consistent navigation navigation mechanisms are repeated within a Web site, occur on each repetition in the same order, unless the user or the user makes a change.
3.2.4 uniform designation within a Web site and related Web pages are uniformly designated items with same functionality.
Requirement 3.3 of error prevention and correction support functions for the input must be provided.
Conditions 3.3.1 error identification an input error is automatically detected, the erroneous element is shown and the error is described to users and users in the form of text.
3.3.2 are labels for necessary input of user information or label (labels) to make available.
Correction proposals an input error is automatically detected 3.3.3 and correction proposals are known, they are to provide the user or the user if they endanger not security or purpose of the content.
3.3.4 change controllable data in data storage systems to avoid errors in Web pages which constitute legal commitments or lead to financial transactions of users or by users or delete or send test answers of users, have at least one of the following users:-the execution can be undone.
-The data are checked for input errors and the possibility, if necessary, to correct it.
-The information can be reviewed, corrected, and confirmed before finally being sent off.
Principle 4: Robust - content must be so robust that they can reliably be interpreted by all user agents, including assistive technologies.
Requirement 4.1 is compatible with user agents, including assistive technologies, to make sure.
Conditions 4.1.1 parsing content created with markup languages, consist of elements, apply the following properties:-you have complete start and end tags, - they are nested according to their specifications, - they contain no duplicate attributes and all their IDs are unique, it is because their specifications allow this feature.
4.1.2 name, role, value for all components of the user interface name and scroll through programs are recognizable. States, properties, and values that can be set by users, can be used by a program. Changes this States, properties, and values get user agents, including assistive technologies, a communication.
Priority II principle 1: visibility - the information and components of the user interface are to represent, can be perceived by the users and users.
Requirement 1.2 for time-controlled media are to provide alternatives.
1.2.6 policies for sign language for prerecorded audio content in synchronized media to provide translations in German sign language.
1.2.7 extended audio description of the prerecorded video content in synchronized media is to provide an extended audio description.
1.2.8 full text alternative for recorded synchronized media is to provide a full text alternative including any interaction. For recorded video files a text alternative with equivalent information shall be provided.
1.2.9 live audio content during live broadcasts of audio content is to provide a text alternative with equivalent information.
Requirement is 1.4 users and users as far as possible to facilitate the perception of the content and the distinction between foreground and background.
Conditions 1.4.6 contrast between foreground and background colour contrast in the Visual presentation of text and font graphics is at least 7:1. A contrast ratio of at least 4.5: 1 applies to uppercase and uppercase font graphics. No minimum contrast is required for minor text and font graphics - are part of an inactive user interface component - which are purely decorative, are incidental text in an image or - which are not visible to the user or the user.

No minimum contrast requirements also apply to text that is part of a logo or brand name.
1.4.7 background noise recorded audio content containing language to the fore, have little or no selectable background noise. Background sounds are at least 20 decibels quieter than the linguistic content in the foreground, if it is not only occasional sound effects, take the one or two seconds. Audio content that is an audio CAPTCHA or audio logo, as well as audio content, primarily involving the musical expression, are excluded from this.
1.4.8 Visual presentation on the Visual presentation of blocks of text are mechanisms available, which allow for the following: - foreground and background colors can be selected by users and users - the line width is no more than 80 characters, - the text is not justified, - the line spacing is at least 1.5 lines within paragraphs, — larger than the line spacing is the distance between paragraphs and - the text can be enlarged in full-screen mode without assistive technology up to 200% , without that must scroll horizontally in a line of text the users or users.
1.4.9 font graphics font graphics are only for decoration used or in cases where a particular presentation of text is essential for communicating the information.
Principle 2: usability - user interface components and navigation must be controlled.
Request 2.1 for the entire functionality is to ensure accessibility of the keyboard.
Condition 2.1.3 keyboard usability all functionality of the content can be operated through a keyboard interface, without any specific timelines for the individual keystrokes must be observed.
Request and the perception and 2.2 is to give sufficient time to read and use content.
2.2.3 policies no time limits time limits at the event or activity presented by the content is not permitted. This does not apply for non-interactive synchronized media and real-time events.
2.2.4 interruptions, interruptions can be postponed or suppressed, unless it is interrupted in an emergency.
2.2.5 recovery application when an authenticated session expires must after re registration be ensured that can continue the activity without loss of data.
2.3 content are request to ensure that no epileptic seizures are triggered.
Condition 2.3.2 triple Flash Web pages contain no elements in a period of a second more often than three times flashing.
Orientation and navigation AIDS, as well as AIDS to find content to provide are request 2.4 of the user or the user.
2.4.9 conditions are shown in the link text itself purpose a link target, and purpose of a link.
2.4.10 section headings are section headings to use which continue to structure the content.
Principle 3: Intelligibility - information and the operation of user interface must be understandable.
3.1 texts are request to make readable and understandable.
Conditions 3.1.3 unusual words for words or phrases used in an unusual or restricted sense — including dialects and jargon - there are mechanisms to explain.
3.1.4 abbreviations for shortcuts is there a mechanism that provides its written-out form or describes their meaning.
3.1.5 simple language for all content is the clearest and simplest language to use, which is reasonable. Additional explanatory content or graphical or audio presentations be made available for difficult texts.
3.1.6 pronunciation for words, their meaning is not clear, without the correct pronunciation is there a mechanism that shows the correct pronunciation.
3.2 Web pages are request to ensure that construction and use are predictable.
Condition 3.2.5 changes the context context changes are only on request by the user or the user causes or there is a mechanism to turn off these changes.
Requirement 3.3 of error prevention and correction supports input must be provided.
Conditions 3.3.5 help are there to provide context sensitive help.
3.3.6 error prevention: for Web pages that require that users provide information, they have at least one of the following ways:-the execution can be undone.
-The data are checked for input errors and the possibility, if necessary, to correct it.
-The information can be reviewed, corrected, and confirmed before finally being sent off.
Glossary abbreviation shortened form of a Word, a sentence or a name, which is limited to the written language. so, the short form is not spoken as such. The abbreviations include short words, which are formed from the initial letters or-silben of a phrase or composition and a Word can be pronounced as (acronyms or initial words).
An alternative for time-controlled media provides document that contains a correctly decoded description of timed Visual and acoustic information and a means to achieve the results of all time-driven interactions. A screenplay written by synchronized media content design, meets this definition only if it was edited to the published version of the synchronized media according to.
Assistive technologies software or hardware that has been specifically is the use of computers to help disabled people, where the boundary between user agents and assistive technology fluency. The following assistive technologies are important in the context of this Regulation:-screen magnifiers, and other Visual AIDS to support blind and partially-sighted people reading, which change the font, the size, character spacing, and color as well as synchronize with language, to improve the readability and clarity of text and images or to enable;
-Screen readers used by blind people to output textual information in speech or Braille;
-Reading software for blind and visually impaired people or people with learning or intellectual disabilities;
-Speech recognition software, which is used for example by physically disabled people;
-alternative keyboards such as for sight and disabled people;
-alternative pointing devices, which are used by physically disabled people to simulate a mouse or switching surface activation.
Audio technology for sound playback. With her sounds can be synthetically generated or absorbed by real sources. A combination of both methods is possible.
Audio description of the sound track added description of important Visual details, whose understanding arises not only from the main sound track. It is called "Video description" and "Descriptive narrative". An audio description of video content provides information about actions, characters or actors, change of scene, texts on the screen and other visual content. In standard audio description, the description in breaks between the dialogues is added (see also "extended audio description"). If all the information of the videos already contained in the existing audio track, no additional audio description is necessary.
Change the context of significant content changes of a Web page which, if they be taken without knowledge or intention of the user or the user's could confuse the users and users which can overlook a whole page at once.
Changes the context include changes - the user agent, - of the display (the display area in the Web browser window, which is actually available for the representation of Web content), - focus and box - content, if this affects the meaning of the Web page.
Comments: Content changes are not always a change of context. For example, if an extended outline or dynamic menu, unless you change one of the above mentioned points.
User agent software to access the user or the user's Web content. This includes Web browsers, multimedia players, plug-in the and other programs — including assistive technologies — that users user support and access to Web content.
User interface allows user input and sets the appearance of these inputs.
Specific sensory experience running a sensory experience that is not purely decorative and not expressing important information in the first place or a function.
Identifier text by which software can show a component in the Web content for users. Identifier can be hidden and only assistive technologies to be exempted. In contrast to the identifier, a label (label) is presented to all users and users. In many cases, labels and identifiers are equal.
Flash Exchange between two Visual States in a way that will attract attention.
CAPTCHA
Acronym for "Completely automated public Turing test to tell computers and humans apart", named after the British mathematician A. M. Turing. CAPTCHA literally means "Automatic public Turing test to differentiate computer and people". A Turing test consists of a system of tests to differentiate a human from a computer. CAPTCHAs are prompted often users to enter a text which is presented in an unclear image or audio file with background noise.
Content recognizable by programs is recognizable by programs when provided by a software the data supplied by the author or by the author in such a way that user agents, including assistive technologies, see this content to users in different modalities select and present can.
Link context by programs certain additional information, which through relationships with a hyperlink through programs are visible, combined with the link text and presented to users and users in different modalities. Because screen readers interpret punctuation, they can provide the context if the focus is on a link.
Programs programs are set, if the software methods which user agent used, including assistive technologies, are supported.
Real time event an event that happens at the time of seeing and not completely generated by the content. Real-time events is such as online auctions, in which bids can be made and the auction can be traced at the same time.
Information entered in input errors by users that are not accepted by the system.
Explanatory content extra content which illustrates the existing content or shows.
Extended audio description an extended audio description interrupts a video in its course and supplemented it by an additional audio description. Extended audio descriptions are only added if the sense of the video without lost and the pauses between dialogue and audio description are too short.
Visual alternative and/or text alternative for linguistic and non-linguistic audio information needed to understand of the media content synchronized captioning (captions). Captioning is similar to subtitles, which reflect spoken dialogue basically. In addition, they include not linguistic but also audio information (such as including sound effects, music, laughter), are needed to understand of the program content. Captioning must not prejudice relevant information in the video. Audio descriptions must not be equipped with advanced subtitles because there is descriptions of information, already visually presented. Distinction is made between "Closed Captions" and "Open Captions": "Closed Captions" can, if the player is on or off. "Open Captions" can be switched off.
Functionality the interaction of multiple functions to solve specific tasks. It can be prompted by actions of users.
Sign language when called to a sign language independent, visually perceptible natural language, used in particular by deaf and hard of hearing people to communicate. Sign language consists of combined characters (sign), especially with the hands, are made in conjunction with facial expressions and mouth image (silently spoken words or syllables) and also in the context of the posture.
"general flash"- or "flash red" threshold limit value for a Flash or rapidly changing image sequence. A Flash or rapidly changing image sequence is below this limit, if one of the two following points:-there are no more than three General flashes ("general flash") and/or no more than three red flashes ("red flash") within a second.
-The contiguous area of at the same time emerging flashes is not more than the total of 0.006 Steradianten within a field of view of 10 degrees on the screen (25% of any 10 degree Visual fields on the screen) in a distance typical for the viewing of the screen.
In the following definitions apply: General Flash ("general flash"): A pair of opposing changes in relative luminance by 10% or more than the maximum relative luminance where the relative luminance of the darker images under 0.80 is located and where is "a pair of antagonistic changes" an increase followed by a decrease, or a decrease followed by an increase in.
Red lightning ("red flash"): any pair of opposing transitions bring a saturated red with.
Exception: Flashing, which is a fine, balanced pattern (such as such as white noise or an alternating checkerboard pattern where the squares on one side are smaller than 0.1 degree) does not exceed the threshold values.
Notes: For general software or Web content, using a 341 x 256 arbitrarily placed on the displayed screen area large rectangle with a screen resolution of 1024 x 768 pixels provides a good estimate of a 10 degree Visual field for standard screen sizes and standard distances of the eyes to the screen (such as 15-to 17-inch screen at 59 to 66 cm distance). As higher resolution screens reproducing the contents in the same way with smaller and sharper images, the lower resolution is used for the definition of the limit values.
A 'transition' is the change in relative luminance (or relative saturation in red flashing) between adjacent and minimums in the curve of the relative luminance measurement (or the relative color saturation measurement of the red flashing) depending on the time. A flash consists of two opposing transitions.
The current working definition for "any pair of opposing transitions bring a saturated red with", is: - If for either one or both conditions of each passage applies: R / (R + G + B) > = 0.8,- and when both States of each passage of the change in the values of (R - G - B) x 320 > 20 [negative values by (R - G - B) x 320 are set to 0] is.
-R-, G, and B values range - as specified in the definition for the "relative luminance" - from 0 to 1.
Tools are available that perform an analysis of video screen captures. It is necessary, but no tools for assessing this condition if flashing with three or less flashes per second. Then, the content meets the requirements.
ID shorthand for identifier, which is a unique identifier in HTML and XML documents.
Content includes information and sensory experience, and the perception and mediated by user agents. These include code or markup, which structure, presentation and define interactions of the Web content.
Components of the user interface are part of the content and are perceived by users and users as a single control element for a unique function. The user interface components include form elements and links as components generated by scripts.
Several components of the user interface can be implemented as a single programmatic element. Components are not exclusively tied to programming techniques, but also on the perception as a single control by users.
Context context in the context of this regulation includes the following elements: - user agent - representation field (display pane in the Web browser window, which actually stands for the representation of Web content available) - focus - content, and the influence on the meaning of the Web page has.
Context-sensitive help provides help text, the information about the currently executing function.
Contrast ratio contrast ratio calculated from: (L1 + 0.05) / (L2 + 0.05), where - L1 is the relative luminance of the illumination of the foreground or background colors and L2 is the relative luminance of the darker foreground or background colors.
Comments: contrast ratios can range from 1 through 21 (1:1 to 21:1).
The contrast between foreground and background can be evaluated when contour compensation turned off.
The contrast is captured in regard to the conditions of 1.4.3 and 1.4.6 starting from the fixed background, before the text is presented. If no background color is set, is assumed by a white background.
Background color is the specified color, on which the text is represented. An error occurs when the text color is set to the background color does not; for users, the default background color is unknown and can be measured not as sufficiently contrasted. The same applies to colour not fixed texts in combination with a color-set background.
Letter outlines can modify the contrast and are included in determining the contrast between letters and background. A narrow outline is then considered a part of the letter, a broad outline, which fills the inner parts of letters, as a background.
Compliance with the requirements and conditions should be evaluated for color pairs are typically as given that a writer or an author lying side by side is waiting for you. Authors must not unusual presentations (such as led color change by the user or by the user) in mind, except when caused by themselves.
Controllable data are data that designed that users on them can be accessed (such as E-Mail account information).
Label (caption) text or other component with a text alternative that is presented to users and users, to show a component in your Web content. A label (label) is presented all users and users, while an identifier may be hidden and only provided free assistive technologies compared with. In many cases, label and identifiers are equal. The term is not only limited to the label element in HTML.
Link (hyperlink) reference in an electronic document to any reference destination. The reference target can be located in any source, which can be accessed via the electronic data exchange.
Information that is collected by a real event and transmitted to the receiver without delaying the release delay beyond are live live. The release delay is a short technical reasons delay and is not sufficient for a substantial content processing. Completely computer-generated information is not live. Provide captions and text alternatives for example by the simultaneous input or preparation prepared texts as live subtitles and alternate live text.
Called markup language also "Markup language". Markup language is a category of languages that includes for example HTML (Hypertext Markup Language) or XML (Extensible Markup Language). Markup languages are based on the ISO standard 8879 of set SGML (Standard Generalized Markup Language). They are used in their specific areas of application of the logical description of content, data exchange or the definition of other markup languages.
Mechanism serves process or technology that, to achieve a particular result. A mechanism can be provided explicitly in the content or from the platform or the user agents, including assistive technologies. The mechanism must meet all conditions and demands placed on him.
Media alternative for text media, provide no more information than that, directly in the text or are by means of text alternatives. A media alternative for text rendering is provided for those users who take advantage of alternative presentations of the text. Media alternatives for the presentation of text can be pure audio, only video (including sign language videos) or mixed audio-video presentations.
Natural language spoken, written, or is represented by the sign language that has evolved historically and interpersonal communication is used.
Navigation possibility of human computer interaction for the selection of programs and files. This type of navigation refers to the graphical user interface of a computer and its display. Represented, selectable buttons and icons, users can select programs, select files and fill with content.
Navigation sequence the navigation sequence is the order of the focus change progressive from element to element, if a keyboard interface is used for navigation.
Non-text content content that represents any sequence of letters, is recognizable by programs or whose sequence is not natural language. Non-text content are also ASCII drawings (sample letter), emoticons (strings of punctuation, which emulate a smiley), leetspeak (replacing letters with similar looking numbers and special characters) or images that represent text.
Presentation content, the form perceptible for the user or the users in one is displayed.
Legal obligations transactions where the user or the user enters an agreement, which legally binding rights and obligations arise.
Purely decorative elements serving only an aesthetic purpose, do not provide information and have no other functions. A text is purely decorative if the words can be rearranged or replaced and only the aesthetic purpose is met.
Pure audio a time-dependent representation that consists only of audio content (no video and no interaction).
Pure video a time-dependent presentation that contains only video content (no audio and no interaction).
Relative luminance the relative brightness of any point in color space, normalized to 0 for the darkest black point and normalized to 1 for the brightest white spot.
Notes: In the standard red green blue color space (sRGB color space) the relative luminance is defined as L = 0,2126 * R + 0,7152 * G + 0,0722 * B in R, G and B are defined as follows:-If RsRGB