com.aspose.words

Example:

Document doc = new Document(getMyDir() + "Rendering.docx");

// When we export the document to .odt, we can use an OdtSaveOptions object to modify how we save the document.
// We can set the "MeasureUnit" property to "OdtSaveMeasureUnit.Centimeters"
// to define content such as style parameters using the metric system, which Open Office uses. 
// We can set the "MeasureUnit" property to "OdtSaveMeasureUnit.Inches"
// to define content such as style parameters using the imperial system, which Microsoft Word uses.
OdtSaveOptions saveOptions = new OdtSaveOptions();
{
    saveOptions.setMeasureUnit(odtSaveMeasureUnit);
}

doc.save(getArtifactsDir() + "OdtSaveOptions.Odt11Schema.odt", saveOptions);