Glossary
Searchable terminology from accessibility, web standards, and related fields.
14 results found in Data.
- AAC Corpus (AAC Text Corpus, Augmentative Communication Corpus)
- A collection of text produced by or representative of Augmentative and Alternative Communication (AAC) device users, used for training and evaluating language models and word prediction systems. AAC c…
- Chemical Markup Language (CML)
- An XML-based markup language for representing chemical information including molecular structures, reactions, spectra, and other chemical data in a machine-readable format. CML encodes atoms, bonds, a…
- Clustering Algorithm (Cluster Analysis, Unsupervised Clustering, K-means, PAM, CLARA)
- A clustering algorithm is an unsupervised machine-learning technique that groups similar data points together based on a distance or similarity measure, without needing pre-labelled training data. Com…
- Corpus (Language Corpus, Text Corpus, British National Corpus, BNC)
- A corpus is a large, structured collection of texts used to train, tune, or evaluate language-processing systems. Representative examples include the British National Corpus (BNC, 100 million words of…
- Data Mining (Knowledge Discovery, KDD, Knowledge Discovery in Databases)
- Data mining is the computational process of discovering patterns, rules, and relationships in large datasets, drawing on techniques from statistics, machine learning, and database systems. Common task…
- Decision Tree (Classification Tree, Regression Tree, C4.5, CART)
- A decision tree is a supervised machine-learning model that represents a classification or regression decision as a tree of yes/no tests on input features, with predictions at the leaves. Well-known a…
- Entity-Relationship Diagram (ER Diagram, ERD)
- A type of relational diagram used in software engineering and database design to model the conceptual structure of a system by representing entities (objects or concepts), their attributes (properties…
- Error Profile (Accessibility Error Profile, Violation Profile)
- An error profile is a structured summary of the accessibility issues detected on a page, typically represented as a numeric vector with one component per checkpoint or rule — counts of violations, bin…
- OLAP (On-line Analytical Processing, Online Analytical Processing, Data Cube)
- OLAP (on-line analytical processing) is a class of database technology that organises data into multi-dimensional 'cubes' — for example, sensor-firing counts indexed by room, time zone, day of week, a…
- Principal Component Analysis (PCA)
- A statistical technique that reduces the dimensionality of data by identifying the principal axes of variation in a dataset. In accessibility and assistive technology contexts, PCA is commonly used in…
- Pseudonymization (Pseudonymisation, De-identification)
- A privacy technique in which personally identifying fields are replaced with artificial identifiers — typically hashes, tokens, or randomly assigned IDs — so that the data can no longer be attributed …
- Right to Erasure (Right to be Forgotten, GDPR Article 17)
- A user right under the EU General Data Protection Regulation (Article 17) to have their personal data deleted by a data controller when certain conditions are met (e.g., data no longer needed, consent…
- Trajectory Analysis (Route Analysis, Path Analysis)
- The computational study of movement patterns over time and space, typically derived from GPS or other location data. Trajectory analysis involves modelling, comparing, and classifying sequences of spa…
- Wrapper (Web Wrapper, Data Wrapper)
- In web accessibility and data extraction contexts, a reusable program that maps the visual layout of a web page to its underlying structured dataset by identifying records and fields within the HTML. …