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ONIX validation library and commandline tool

Project description

Onixcheck - Book Trade Metadata Validation

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ONIX for Books is an international XML standard for the publishing and book trade industry.

onixcheck is a Python library and command line tool for validating ONIX metadata. It allows you to validate ONIX versions 2.1 and 3.0.8 against the official XML Schema.

  • Free software: BSD license


On Windows you can download the standalone binary command line tool:

If you have Python or PyPy installed on your system you can do the usual:

pip install onixcheck


Command line usage examples

Validate all .xml, .onx, .onix files in current directory:


Validate a single onix file:

onixcheck myonixfile.xml

Validate all .xml files in /onixdata and its subdirectories:

onixcheck --path /onixdata --ext xml --recursive

Show help:

onixcheck -h

Using onixcheck as a python lib

Simple usage with onixcheck.validate:

>>> import onixcheck
>>> errors = onixcheck.validate('src/onixcheck/data/invalid_onix3_ref.xml')
>>> print(errors[0].short)
ERROR - SCHEMASV - invalid_onix3_ref.xml:4:0 - Element 'SentDateTime': This element is not expected. Expected is ( Sender ).

errors is either a list of Message objects (INVALID file) or an empty list (VALID file)



To run the all tests run:


Contributions/suggestions are welcome.


0.9.7 (2021-09-29)

  • Update Onix 3 to Revision 8 and Code List issue 54

0.9.6 (2019-05-26)

  • Python 3.6 and 3.7 compatibility

  • Update Onix 3 to Revision 6 and Code List issue 45

0.9.5 (2016-08-19)

  • Update Onix 3 to Code List issue 34

  • Remove build artifacts from source distribution

0.9.4 (2016-07-15)

  • Fix issue with windows console output encoding

  • Update windows build to pyinstaller 3.1

0.9.3 (2016-05-10)

  • Update ONIX 3.0 Schemas to Revision 3

  • Add support for RELAX NG and custom schema validations

  • Added validator name to short message output

0.9.2 (2016-04-11)

  • Fix ExtentType in custom validation profile

  • Fix false alarm with multiple Price elements in custom profile

0.9.1 (2016-04-11)

  • Inital support for custom validation profiles

  • Custom Google Play Books onix 3.0 validation profile

0.9.0 (2016-03-27)

  • Added Python 3.5 testing / support

  • Update to ONIX to Code List Issue 32 / 2016-01-24

0.8.1 (2015-07-23)

  • More extensive documentation

0.8.0 (2015-07-23)

  • Added CLI-support for fast directory traversal validation

  • Secured XML-Parsing via defusedxml

  • Catch basic XML syntax errors

  • Windows standalone binary builds

0.4.0 (2015-07-18)

  • First release on PyPI.

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