Lexicon for Accessible Content
Developed by the Accessible Content Community of Practice, this Lexicon for Accessible Content provides a common language for everyone to use at Boise State when discussing content related to accessibility. Use the search field to filter the table content.
|Term||Definition||Examples in Context|
|Alternative Text||A written replacement for an image, audio, video, or media file for users unable to “see” the content.||Alternative text appears within the code as follows, in this case the image is also described:
|Animations||Images or textual content that includes movement such as GIFs or web animations. Often not controlled by the user.||Demonstrates a movement or task.
i.e. finger pushing a button showing a person where to touch an object.
|Audio Control||Users can control when audio, video, or media starts, pauses, or stops. They can also control volume and other functions.||Disable any automatic play features in animations, audio, video, or media published for users.|
|Audio description (standard)||An additional audio track that describes what is occurring in a video during existing pauses in dialog. It is intended for blind and visually impaired consumers of visual media so they may understand what is occurring in a video without seeing it.||The most commonly used form of audio description on videos or television shows. The description occurs during the natural breaks in dialogue.|
|Audio description (extended)||An additional audio track that pauses the video to describe what is occurring when natural pauses in the video do not allow for standard audio description.||May be used during a lecture to describe an image the speaker is referring to. The video is paused to allow for a more detailed description of the visual material then resumes.|
|Captions||Time coded transcript of the dialogue that includes a textual representation of the background noises, sound effects, and speaker identification. May appear at the bottom, top, or side of the screen.||Captions can often be displayed as transparent or opaque gray/black box overlays on the video with white text, as black boxes below the video with yellow or white text or as white text overlaid directly on the video.|
|Captions (live or real-time)||Captions created and displayed in real time as a presenter speaks.||Live online meetings, live presentations or events, live classroom instruction, live social media events.|
|Captions (closed)||Captions that can be turned on or off by the viewer.||The preferred form of captions. The video and the captions are separate files that are imported into the media player.|
|Captions (open)||Captions that always present and can not be turned off.||The captions are embedded into the video to create a single file. This may be used when the media player does not allow a caption file.|
|CC on||Turns on the subtitle or caption track on a video.||A control that allows the caption file to be displayed on the screen.|
|CC off||Turns off a subtitle or caption track on a video.||A control that hides the caption file from being displayed on the screen.|
|Contrast||The visual presentation of 1) essential graphical objects for user interface component(s) or a border line thereof, and 2) the focus and selection indicator(s) of user interface component(s), has a contrast ratio of at least 4.5:1 against the immediate surrounding color(s).||Dark backgrounds use a light text or foreground colors with 4:5:1 contrast. Light backgrounds use a dark text or foreground colors with 4:5:1 contrast.|
|DCMP||The Described and Captioned Media Program (DCMP) is a non-profit that has educational materials and resources for students who are blind, deaf, visually impaired, hard of hearing, or deaf-blind.||Provides guidance for creating high quality captions.|
|Flashing Content||No content flashes more than three times per second.||Flashing content can cause seizures in some individuals and can be distracting for others.|
|Images (advanced)||Includes images such as form buttons, image maps, image slices, background images, logos, and other complex images. May require additional usability testing with screen readers to determine appropriate alternative text.||Describes the meaning of an image.
i.e. The Boise State “B” would be described as a “forward facing B.”
|Images (decorative)||Decorative images do not present important content, are used for layout or non-informative purposes, and do not appear within a link. Required null alternative text (alt=””).||Does not convey a meaning, only describes a decorative element. This should be a silent tag because it can be distracting to a person using a screen reader.
i.e. A border may be described a as white dashed line.
|Images (functional)||Images that provide content, and serve important functions, such as navigation or hyperlinks to other content. Requires succinct, concise, alternative text (alt=”text”).||An icon that allow a user to complete an action.
i.e. Clicking on an envelope icon to email a person or a printer icon to print a page.
|Keyboard Trap||Situation where keyboard only users can get “stuck” on an element with your content.||Once “trapped” the user must exit the page and restart. All audio, video, and media content controls should be operated with a keyboard alternative and should not “trap” users.|
|Media Alternative||A secondary alternative to an audio, video, or media file. Can include audio description, captions, or transcripts.||Creates accessibility by either merging the files together or by providing a separate file that user can click on the access the content.
This may be used when a media player does not have the ability to import a caption or description file or when copyright restrictions prevent content from being edited.
|Media-based content||Content that is shared using audio and/or visual media (images, video); it is used as an alternative to text-based content.||Files can include: JPEG, MP3, MP4.|
|Non-text content||Any content that is provided in a non-text format and includes audio, images, media, and video.||An image such as an infographic, PDF graphic flyer, or audio-only video.|
|Sensory Characteristics||Users can interact with content using more than one sense.||Written or audio instructions may appear as follows:
To submit your entry, select the orange button labeled “submit” on the bottom right of the screen. Or a captcha.
|SRT file||A file that contains subtitle information, including the sequential number of subtitles, their start and end timecodes, and the subtitle text.||The SRT file includes time stamps and text in chronological order as depicted here:
0:00:00,000 --> 0:00:20,000
Boise State University is located in Boise, Idaho.
|Streaming Media||Video that is accessed via the internet as opposed to a download, using players such as YouTube or Vimeo.||A live link to an online video.|
|Subtitles||Time coded transcript or translation of the dialogue displayed at the bottom of a video, movie, or television screen.||Includes spoken dialogue only and omits speaker identification and sounds effects.
Subtitles may appear in the same or different language than the dialogue on the screen.
|Time-based Media||Media that can only be experienced through time such as video and audio.||Video, slide show, or recorded audio.|
|Transcript||A text equivalent of all the words spoken in an audio or video recording. Required for audio/video/media files without captions.||Transcripts identify speaker and content and may look like:
>> NARRATOR: Boise State University is located in Boise, Idaho.
|Video||A recording of moving visual images, often accompanied with audio.||DVD, YouTube, Motion Picture, tutorial, webinar, or Vlog.|
|VPAT “Voluntary Product Accessibility Template”||Document used to assess products and services with features that support accessibility.||This term is used during the procurement process to assess a vendors software, hardware, and/or content accessibility.|
|WCAG 2.0||Web Content Accessibility Guidelines version 2.0||This term refers to the set of guidelines and standards required for accessible web content at Boise State.|