National Instructional Materials Accessibility Standard

The National Instructional Materials Accessibility Standard (NIMAS) helps facilitate timely access to alternate formats of instructional materials for students with visual impairments or other print disabilities. NIMAS (pronounced NYE-mas) outlines a set of consistent and valid XML-based source files created by K–12 curriculum publishers or other content producers.

Source: Wikipedia — National Instructional Materials Accessibility Standard (CC BY-SA 4.0)