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NIMAS Exemplar 6: Science


The content of this exemplar has been developed for the purpose of creating exemplar files.These files should not be re-posted to other sites, nor may they be sold for commercial purposes. Organizations wishing to make this content available to others may link to this page in order to obtain the most current versions. Questions about this exemplar should be addressed to

First posted on 06/05/06. Last Updated on 02/25/09.

Note: MathML 3 is now the preferred way to represent mathematical content in NIMAS 1.1 filesets. Please see NIMAS Exemplar 12: MathML 3 for additional information. 

Baseline NIMAS 1.1 Exemplar

The baseline NIMAS files comprise the basic NIMAS 1.1 fileset that would be submitted by an educational publisher. NIMAS 1.1 is based on the DAISY 2005 DTD; publishers and other producers are encouraged to use full DAISY mark-up wherever possible.

This exemplar includes the following:

  • NIMAS 1.1-compliant XML content file
  • OEBPS 1.2-compliant package file (NIMAS OPF file)
  • -.pdf file of title page
  • images

Download NIMAS 1.1 Exemplar 6

Please see the mark-up rationale below for information and explanations regarding the mark-up of symbols, equations, and the like in science and mathematics content.

Please refer to Creating NIMAS Files for tips on creating NIMAS filesets.

Note about Images

Images provided with baseline filesets are 300 dpi as required by the Standard, and 72 dpi images are provided with X-/HTML and HTML extension-only filesets since they may be more appropriate for some uses. Simply swap out the images folder from one set to another if a different dpi is desired.

MathML (Mathematical Markup Language)

XML-based markup language used to display mathematical content.

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National Instructional Materials Accessibility Standard (NIMAS)

A technical standard used to produce XML-based source files for print-based educational materials.

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Digital Accessible Information System (DAISY)

Technical standard for producing accessible and navigable multimedia documents.

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Document Type Definition (DTD)

Discrete set of XML tags, targeted at a particular type of application.

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XML (EXtensible Markup Language)

Universal format for structured documents and data. Set of rules, guidelines, and conventions for designing text formats for data.

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PDF (Portable Document Format)

Universal computer file type used to exchange and view documents on any computer with Adobe Acrobat or Foxit Reader software installed.

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Supplementary Files

The supplementary files included here are not part of the required NIMAS fileset. The separate, full XHTML file with content images (not the HTML extension-only file) can be considered a student-ready version of the exemplar.

HTML Extension Fileset

These HTML files have been converted from their XML versions by changing their extension. Please see the XHTML version for a true HTML file that validates to the XHTML 1.0 Transitional DTD.

The HTML extension fileset includes the following:

  • NIMAS 1.1 HTML ext.-only content file
  • images
  • css stylesheet

Download HTML Extension Fileset

XHTML Fileset

This XHTML validates to the XHTML 1.0 Transitional DTD. Its mark-up differs from that of the other files.

The XHTML fileset includes the following:

  • XHTML content file
  • images
  • css stylesheet

Download XHTML Fileset

Note that all images have alt tags (alternative text descriptions) and where appropriate images have long descriptions. A long description is provided based on the complexity and scope of what is conveyed by an image.

NIMAS Conversion Tool HTML Version

The NIMAS Conversion Tool version is a student-ready output created with Exemplar 6's Baseline 1.1 XML fileset as its source and using the NIMAS Conversion Tool to create an HTML output. The NIMAS Conversion Tool converts NIMAS-conformant XML filesets into leveled XML files and/or into leveled HTML files that can be opened and viewed in a browser.It includes image support, TOC generation, and MathML support. To learn more and to download the Tool, go to the NIMAS Conversion Tool page.

Download NIMAS Conversion Tool HTML Version

Mark-Up Rationale

This document explains the rationale behind mark-up choices for the Science content exemplar. Information about the mark-up of mathematical symbols and related items will be of particular interest to those seeking a model for producing accessible instructional materials in the science content area.

Download Mark-Up Rationale

Cascading Style Sheet (CSS)

Provides the capacity to separate the layout and style of a web page from the content.

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Alt Tag (alternative text)

Brief description of a single image designed to be read by a screenreader as an alternative to the image.

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Accessible Instructional Materials (AIM)

Print-based educational materials converted into specialized formats, related to the requirements of the IDEA statute.

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