WCAG-ODC Accessibility Defect Classification Dataset

This repository contains the research artifacts supporting the WCAG-ODC (Web Content Accessibility Guidelines – Orthogonal Defect Classification) framework for accessibility defect classification and analysis. The repository includes: 1- A classified accessibility defect dataset containing 2,590 accessibility defects derived from nine public e-services.2- A complete rule-to-category mapping scheme linking 31 accessibility rule categories to WCAG-ODC defect families.3- Validation materials used for independent classification reliability assessment.4- WCAG-ODC classification definitions and coding guidance. Accessibility findings were collected using WAVE, ARC Toolkit, and IBM Equal Access Toolkit. Although findings were collected using all three tools, only IBM Equal Access Toolkit provided exportable defect-level records suitable for large-scale WCAG-ODC classification. Consequently, IBM findings served as the primary dataset used for classification and analysis. The dataset supports research in accessibility engineering, accessibility defect analysis, software quality, web accessibility evaluation, and accessibility process improvement.