Formalizing Visualization Semantics for Accessibility
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This article introduces a hierarchy of ontologies for visualization with applications in accessibility to statistical charts. Formally defining graphical content and its underlying semantics enables interactive systems, such as natural language interfaces (NLIs) to efficiently retrieve information of interest for the user as well as inputting additional bits of information, both user- and system-initiated, into the graphic. In turn, such access machanisms allow blind persons to query and navigate statistical charts and other commonly visually displayed data in an effective manner.