Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 254 of 333
- Semantic Description (SD, Navigational Semantic Description)
- A formal representation of the meaningful structure and navigational relationships within a complex document component such as an HTML table, frame, or XML fragment. Semantic descriptions capture what…
- Semantic Disambiguation (Word Sense Disambiguation)
- Semantic disambiguation is the process of determining the intended meaning of a word, symbol, or input when multiple interpretations are possible. In accessibility and assistive technology contexts, s…
- Semantic Enrichment (Semantic Annotation, Semantic Markup Enhancement)
- Semantic enrichment is the process of adding meaningful structural and contextual information to content that may lack it in its original representation. In the context of web accessibility, this ofte…
- Semantic Grounding (Meaning Grounding, Form-Meaning Mapping)
- A design principle in which practice or interaction is accompanied by explanations that connect the form of an action to its underlying meaning, rather than treating the action as an arbitrary symbol …
- Semantic HTML
- The practice of using HTML elements according to their intended meaning rather than their visual appearance. Semantic elements like <nav>, <main>, <article>, <aside>, and <header> communicate the stru…
- Semantic Hearing (Programmable Hearing, Intent-Aware Hearing)
- A research paradigm and class of systems that treat the user's auditory environment as something programmable: rather than uniformly amplifying or suppressing all sound, the wearable headphone or earb…
- Semantic Hierarchy (Semantic Tree, Component Hierarchy)
- A structured, tree-based representation of a complex object that organizes its components by meaning and relationship rather than by raw data. In accessible 3-D modeling, a semantic hierarchy breaks d…
- Semantic Level (Semantic Content Level, Alt Text Semantic Level)
- A framework for categorizing the depth of information conveyed in alt text descriptions of data visualizations, introduced by Lundgard and Satyanarayan. The four levels are: Level 1 (construction deta…
- Semantic Listening
- A mode of listening, identified by composer and theorist Pierre Schaeffer, in which the listener focuses on decoding a coded audio signal to arrive at its intended message — for example, understanding…
- Semantic Model (Semantic Tree, Semantic Web Model)
- An abstract representation of a web page that captures the meaning and relationships of its content, rather than its raw HTML structure. Unlike the Document Object Model (DOM), which represents syntac…
- Semantic Navigation (Semantic Navigation Framework, Structured Navigation)
- An approach to organizing digital content into a meaningful hierarchical structure that users can navigate through logically ordered elements rather than by spatial position. In the context of accessi…
- Semantic Network (Semantic Web, Associative Network)
- A knowledge representation structure in which concepts are represented as nodes and the relationships between them as links or edges. In accessibility and AAC contexts, semantic networks model how wor…
- Semantic Partitioning (Web Page Partitioning, Content Partitioning)
- A technique for automatically dividing a web page into semantically meaningful segments or blocks based on the structural and visual properties of its HTML content. Semantic partitioning analyzes the …
- Semantic Redundancy (Redundant Multimodal Input)
- A design strategy in multimodal interfaces where the same command or message is conveyed simultaneously through multiple input channels, each independently signalling the user's intent. For example, a…
- Semantic Relatedness (Semantic Similarity, Semantic Association)
- A measure of how closely related two words or concepts are in meaning, encompassing various types of relationships including synonymy, hyponymy, meronymy, and general topical association. In assistive…
- Semantic Scene Graph (SSG, scene graph)
- A semantic scene graph is a structured data representation of a 3D or 2D environment that encodes objects, their properties (such as position, size, color, and audio characteristics), and the spatial …
- Semantic Segmentation (Pixel-Level Classification, Scene Parsing)
- A computer vision technique that classifies every pixel in an image into a predefined category, producing a detailed map of what objects are present and where they are located. Unlike object detection…
- Semantic Structure (Semantic Representation)
- Semantic structure refers to the meaningful organisation of content that captures the conceptual relationships between pieces of information, as distinct from the syntactic or visual presentation of t…
- Semantic Tagging (Structural Tagging, PDF Semantic Markup)
- The process of marking up content within a PDF document with tags that convey the semantic meaning and structural role of each element — such as headings, paragraphs, lists, tables, figures, and links…
- Semantic Taxonomy (Environmental Semantic Taxonomy)
- A structured classification system that organizes and labels environmental features and attributes using standardized vocabulary, enabling consistent description and retrieval of information about phy…