Latest version is 0.20-alpha-2.
The project website is available here: http://odf.openpreservation.org/.
See instructions on the project website: http://odf.openpreservation.org/#installation
Open Preservation Foundation's OpenDocument Format Validator (OPF ODF Validator) enables your organisation to validate the file format standard. Additionally, it supports a set of file format policy rules created for improving the preservation effort of OpenDocument Format spreadsheet files.