doc.header.languages = "ger" #86
Description
Hi,
Thanks for the work building that library.
There is a minor issue with "doc.header.languages". It's defined as a MultiStringField, but should be a StringField because only one language is allowed: <xs:element name="LanguageID" type="udt:IDType" minOccurs="0"/>.
The change will also affect the example in the README: 'doc.header.languages.add("de") need to be doc. header. languages = "ger" (the value for the language "DE" is showing an error in Valitool, and I think it should be "ger" instead of "DE").