| DataNotSuppliedReasonType | A value from a MISMO prescribed list that specifies the reason a specific data point is not included in the message. |
| DataNotSuppliedReasonTypeAdditionalDescription | A free-form text field used to provide a supplemental comment or remark regarding the Data Not Supplied Reason Type. |
| DataNotSuppliedReasonTypeOtherDescription | A free-form text field used to capture the enumeration when Other is selected for Data Not Supplied Reason Type. |
| label | |
| ReferenceSigningType | This attribute describes how the content of a REFERENCE or ObjectURL element is signed using XML digital signatures. This instructs systems about which transformation, if any, needs to be applied to the REFERENCE or ObjectURL element before validating existing SYSTEM_SIGNATURES or applying new ones and what transformations are prohibited. |
| SensitiveIndicator | Allows producers and consumers of XML instance documents that are valid MISMO V3 documents to mark any data point to be treated as sensitive. MISMO recommends that any use of a data point labeled as "Sensitive Information" in the LDD ALWAYS have this attribute set to "true". |