LanguageCode 

a language code, as per [RFC3066]

Simple Type Information

Used By

Attributes a/@hreflang, bdo/@lang, i18n/@lang, link/@hreflang

Source 

<xs:simpleType name="LanguageCode">
  <xs:annotation>
    <xs:documentation>a language code, as per [RFC3066]</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:language"/>
</xs:simpleType>