Technology of Webpages Development to Support Accessibility Requirements for Blind People Using NVDA

The work deals with issues that are relevant for developers of websites and web applications to support users with certain disabilities who access the Internet via desktop computers or laptops using screen reader NVDA. The core users of NVDA are blind people. The effectiveness of using the application depends on the quality and completeness of the description of the web page tags. The purpose of the research is to ensure the appropriate level of accessibility of web pages that will be used by blind users using NVDA. Formalized rules for analyzing structure of webpages in the form of predicates calculus have formed. The proposed technology for developing webpages and web applications has been presented in the form of BPMN business process diagrams. Approach for automated detection of problematic tags in the structure of webpages has considered. Several webpages with identical design and different web-structure have been researched for checking accessibility requirements for blind people. The results of webpage accessibility estimation and the corresponding screenshots that visualize problematic situations in the work of blind users with a webpage have presented.