Accessibility of Tables in PDF Documents

People access and share information over the web in other digital environments, including libraries, form of documents such as books, articles, technical reports, etc. These are a variety formats, which Portable Document Format (PDF) is most widely used because its emphasis on preserving layout original material. The retrieval relevant material from these derivative challenging for (IR) rich semantic structure lost. important units images, figures, algorithms, mathematical formulas, tables becomes challenge. Among elements, particularly they can add value to resource description, discovery, accessibility not only but also libraries if made retrievable presentable readers. Sighted users comprehend sensemaking using visual cues, blind visually impaired must rely assistive technologies, text-to-speech screen readers, tables. However, technologies do pay sufficient attention order effectively present individuals. Therefore, ways be found make PDF comprehensible. Before developing solutions, it necessary review available tools, frameworks their capabilities, strengths, limitations comprehension perspective people, along with suitable environments like libraries. We no article that critically analytically presents evaluates technologies. To fill this gap literature, paper reports current state documents, comprehensible accessible people. study findings have implications sciences, retrieval.