Glossary

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Document Expansion(also: Query Prediction, Document Enrichment)

An information retrieval technique that enhances a document by augmenting it with additional terms or predicted queries that users might use to search for that content. Methods like DocTTTTTQuery use sequence-to-sequence machine learning models to generate likely search queries…

Information Extraction(also: IE, Data Extraction)

The process of automatically identifying and retrieving structured information from unstructured or semi-structured data sources. In the context of accessibility and data visualization, information extraction refers to how users — particularly screen-reader users — pull specific…

Sign language detection(also: SL detection, Signing detection)

The automated identification of whether video content contains sign language communication, using computer vision techniques to analyse motion patterns around detected faces. Sign language detection is distinct from sign language recognition (which interprets specific signs): it…

Singular Value Decomposition(also: SVD)

A mathematical technique that decomposes a matrix into three component matrices, used to reduce high-dimensional data to its most important features while preserving essential relationships. In accessibility research, SVD is a core component of Latent Semantic Analysis and has…

Web Segmentation(also: Page Segmentation, Web Page Segmentation)

The process of dividing a web page into distinct, meaningful sections or segments based on visual layout, structural markup, or content semantics. Web segmentation is important for accessibility because screen readers typically narrate content in DOM order, which may not reflect…

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