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usnistgov / NISTIR-8112

Attribute Metadata Publication
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Accuracy:validity metadata for self-asserted attributes #56

Closed JaapFrancke closed 7 years ago

JaapFrancke commented 7 years ago

Organization: www.iWelcome.com

Type:

Reference (Include section and paragraph number): 3.2.1.1

Comment (Include rationale for comment): The accuracy metadata are relevant or pertaining to determining if the attribute’s value is correct and belongs to a specific subject. The focus/bias of possible values for VerificationMethod is on the aspect of "belongs to a specific object". For attributes that are self-asserted but have not been verified, there is the notion of validation: some values can be known to be valid or not, regardless of the question whether or not the value belongs to the specific subject. A valid but unverified, self-asserted address has more value than an invalid, unverified, self-asserted address.

Having this attribute brings the value of not applying a verification process on invalid values.

Suggested Change: Introduce Validation attribute in the 'accuracy' category. Possibly also a Validator attribute. Validity has possible values "Valid", "Invalid", "Possibly valid", "Not validated". Validator could be something like https://www.ups.com/content/us/en/bussol/browse/online_tools_us_address_validation.html. Note that "Possibly valid" could be used to indicate situations where the value cannot be invalidated but cannot be confirmed to be valid with certainty.

Organization: 2 = Industry

RGalluzzo commented 7 years ago

This item seemed a little too subjective to include in the schema at this time. Logic and rules around "validity" of an attribute value may vary too widely to be consistently applied.

JaapFrancke commented 7 years ago

@RGalluzzo I understand your concern about subjectivity. However I think this can be resolved by adding a field to the Attribute Schema Metadata ("Validation method") that indicates the validation method that is applied for that field. This will make it transparent and less subjective. In a specific context, parties can agree on validation method. The AP can indicate the validation-method in the Attribute Schema Meta data.

Note that a similar approach could be applied for classification.