NIMAS refers to a technical standard used to produce XML-based source files. From these well-structured source files, accessible, student-ready alternate-format versions of textbooks and core materials (., Braille, e-text, Digital Talking Book, large print, etc.) can subsequently be created and distributed to qualified students with print disabilities. NIMAS files are not student-ready versions. IDEA 2004, . 108-446, establishes the NIMAS as a national standard and requires states and local districts to adopt the NIMAS for providing textbooks and instructional materials to students who are blind or print-disabled.
The term visual rhetoric falls under an umbrella term known as visual literacy, which is generally split into three categories: visual thinking, visual learning, visual rhetoric/communication (though clearly visual thinking and visual learning must occur in order to communicate visually). The following diagram illustrates these ideas. The graphic is modified from Sandra Moriarty's diagram in her essay, "A Conceptual Map of Visual Communication" and from "Teaching Visual Literacy and Document Design in First-Year Composition" (MA Thesis) by Allen Brizee.