Complex PDF Remediation for Accessibility: Review of Current Methodologies

There is a growing demand to remediate complex non-accessible PDF. For instance, schoolbooks which are required to be accessible and show a wide variability in their morphology. A problem lies in the existence of an extensive bibliography of digital teaching material that are delivered using PDF notaccessible. Currently the tasks involved in making a PDF accessible are expensive due that many of them have to be performed manually. Among these, structuring PDF content is especially time-consuming. Tagging i.e. associating a label to each significant element of the document, is a prime example thereof, as it is of uttermost importance in order to enable assistive technologies, such as screen readers or accessible forms for motor disabled people that do not use analog pointing devices.