The object attribute fields "Category" and "Subcategory" could be used to generate "Artifact Class," "Work Type," and "Collection Category" (or, in some cases, just "Artifact Class" and/or "Collection Category") for fields that do not have those values.
Where objects already have values for "Artifact Class" and "Work Type," information from "Subcategory" should not be used to overwrite the values currently in those categories. See: Spreadsheet of all artifacts sorted by category and [List of subcategories.
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Artifact Class, Work Type, and Collection Category.
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