Qualifier values of 0509 in ISO9735
Role of security provider, coded (an1..3)
Identification of the role of the security provider in relation to the secured item.
The security provider is the rightful issuer of the signed document.
The security provider acts as a notary in relation to the signed document.
The security provider endorses the content of the signed document.
The security provider is a witness, but is not responsible for the content of the signed document.
Mutually agreed between trading partners.