If you are generating OVF 1.0 or OVF 1.1 descriptors manually, you can check whether the descriptors comply with OVF 1.0 or OVF 1.1. The following examples show how to validate descriptors:
> ovftool --schemaValidate package.ovf > ovftool --schemaValidate package.ova > ovftool --schemaValidate http://example.com/folder1/package.ovf > ovftool --schemaValidate http://example.com/folder1/package.ova
If everything is correct, OVF Tool shows the result of probing OVF. Otherwise, it shows warnings and errors.