Validates the given file against the appropriate VOTable schema.
The path to the XML file to validate
- versionstr, optional
The VOTABLE version to check, which must be a string “1.0”, “1.1”, “1.2” or “1.3”. If it is not one of these, version “1.1” is assumed.
For version “1.0”, it is checked against a DTD, since that version did not have an XML Schema.
- returncode, stdout, stderrint, str, str
Returns the returncode from xmllint and the stdout and stderr as strings