Validation Tools

ANSI/NISO Z39.86 Validator - ZedVal

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ZedVal, also known as the ANSI/NISO Z39.86 Validator, is a DAISY 3 content validator. It was designed to validate Audio NCX books to support their conformance with DAISY 3, officially the ANSI/NISO Z39.86 Standard. More info at the project site.

Latest Release: ZedVal 2.1

This version fixes an issue that caused books containing the MathML 'annotation' element to be incorrectly reported as invalid.

DAISY 2.02 Validator

During the validation process, the software applies a series of conformance tests to the DTB. It compares the data in the DAISY content to the requirements and recommendations of the DAISY 2.02 Specification.


The Validator is testing for two things: if the DAISY DTB is readable (if it will play correctly), and if it is conformant. In conformance testing, possible violations to specifications are checked, regardless of their impact on the readability of the book. For example, information (metadata) such as book identifier or author are mandatory in the Specification.


The results of the validation process are divided into two groups: errors and warnings. For details about the DAISY 2.02 Validator, please read its manual carefully.


The DAISY 2.02 Validator was developed in an open source context.


Download DAISY 2.02 Validator