missing VAT identification number?

In http://schema.org/Organization there are legalName
<http://schema.org/legalName>, but no option to express the document where
the *legalName* was registered, the "VAT-indentification-number oficial
document <https://en.wikipedia.org/wiki/VAT_identification_number>"
(VATIN)... And, when expressing the company's code, there are no property
to express the VATIN number.

- - -
Example, for Brazil the VATIN document is named "*CNPJ*", and for United
Kingdom (UK)  VATIN document is named "*VAT Reg No*".
*CNPJ* is the official document for check company's *legalName* and number
in Brazil;  *VAT Reg No *is the official document for check company's
*legalName* and number in UK.