Glossary
Searchable terminology from accessibility, web standards, and related fields.
42 results found in content accessibility.
- Accessible Graphics (Accessible Images, Non-Visual Graphics)
- Visual information such as charts, diagrams, maps, and illustrations that has been made perceivable and understandable to people with visual impairments through alternative formats. These formats incl…
- Accessible PDF (Tagged PDF, PDF/UA)
- An accessible PDF is a Portable Document Format file that has been structured with tags, reading order, alternative text for images, and other metadata so that it can be navigated and read by assistiv…
- Accessible Slides (Accessible Presentation Slides, Non-Visually Accessible Slides)
- Presentation slides that have been structured and annotated to be usable by people with disabilities, particularly blind and visually impaired users who access content via screen readers. Accessible s…
- Alt Text Authoring (Alt Text Writing, Image Description Authoring)
- The process of composing alternative text descriptions for digital images, undertaken by content authors, developers, or dedicated accessibility specialists. Research has identified several barriers t…
- Alternative Text (Alt Text, Alt Attribute)
- Text associated with an image that serves the same purpose and conveys the same essential information as the image. Alternative text is a fundamental web accessibility requirement specified in WCAG, e…
- Anchoring Effect (Anchoring Bias, Cognitive Anchoring)
- A cognitive bias in which people rely too heavily on an initial piece of information (the "anchor") when making subsequent decisions or judgements. In the context of digital accessibility, the anchori…
- Automatic Alt Text (AI-generated Alt Text, Auto Alt Text, Machine-generated Alt Text)
- Alternative text for images that is automatically generated by artificial intelligence systems using computer vision and natural language processing. Platforms like Microsoft PowerPoint, Facebook, and…
- Automatic Image Captioning (AI-Generated Alt Text, Machine-Generated Description, Auto Alt Text)
- The use of computer vision and machine learning algorithms to automatically generate textual descriptions of images without human intervention. Social media platforms like Facebook and Instagram deplo…
- Composite Figure (Multi-panel Figure, Multi-element Figure)
- A figure that contains multiple distinct visual elements combined into a single image, such as a series of screenshots labeled (a) through (f), a set of charts showing different data sets, or a mix of…
- Content Filtering (Content Adaptation, Adaptive Content Delivery)
- The process of selectively displaying or hiding portions of digital content based on user preferences, roles, device capabilities, or accessibility needs. In an accessibility context, content filterin…
- Controlled Language (Controlled Natural Language, CL)
- An explicitly defined restriction of a natural language that specifies constraints on vocabulary, grammar, and style to improve clarity, consistency, and machine processability of text. In accessibili…
- Data Visualization (Data Viz, Information Visualization)
- The graphical representation of data and information using visual elements such as charts, graphs, maps, and diagrams. While data visualization is a powerful tool for communicating patterns and insigh…
- Decorative Image (Decorative Graphic, Presentational Image)
- An image that serves a purely aesthetic or visual design purpose and does not convey meaningful information to the user. According to WCAG guidelines, decorative images should receive empty alt text (…
- Document Accessibility (Accessible Documents, Document Remediation)
- The practice of creating or converting digital documents so they can be effectively accessed by people using assistive technologies, particularly screen readers. Accessible documents require proper se…
- Easy Language (Easy-to-Read, Leichte Sprache, Easy Read, Einfache Sprache)
- A simplified form of written language designed to make information accessible to people with reading difficulties, including those with intellectual disabilities, prelingual hearing impairments, learn…
- Easy Read (Easy-to-Read, Easy Language, Plain Language for Cognitive Accessibility)
- A method of presenting written information in a way that is accessible to people with intellectual disabilities, learning difficulties, or low literacy. Easy Read uses short sentences, common everyday…
- Embedded Description (Inline Description, Integrated Description)
- A technique for making presentation content accessible where the speaker verbally describes relevant visual information on slides — including text, images, graphics, and other visual aids — as part of…
- Figure Accessibility (Chart Accessibility, Graph Accessibility)
- The practice of making visual figures, charts, graphs, and diagrams in documents and publications accessible to people who cannot see them, particularly blind and low vision users. Figure accessibilit…
- Graph Accessibility (Chart Accessibility, Data Visualization Accessibility)
- The practice of making charts, graphs, and other data visualisations perceivable and understandable to people with disabilities, particularly those who are blind or have low vision. Graph accessibilit…
- Image Accessibility (Visual Content Accessibility)
- The practice of making images perceivable and understandable to people who cannot see them, primarily through alternative text descriptions. Image accessibility is a foundational requirement of WCAG (…