lang

This attribute is used to specify the language of a value at the element level. If the language of the element is different from that specified in , then this attribute is required. As specified elsewhere in these guidelines, the value of the lang attribute must be taken from ISO 639-2/b.

script

This attribute is used to specify the script of a value at the element level, and is required anytime a non-roman script is used. The value of the script attribute must be taken from ISO 15924. transliteration This attribute specifies the transliteration technique used at the element level (e.g. ALA/LC Romanization Tables). The value of transliteration is uncontrolled. Non-roman scripts do not need to be transliterated.

xlink:href

Use the xlink attribute when linking to an external resource, like a complementary metadata record. These guidelines recommend using xlink in and only