return {
    uri = "pas:Artifact",
    label = "Artifact",
    description = "Intellectual work.",
    broader = "anything",

    properties = {
        has_member = {
            uri = "pas:hasMember",
            label = "Has member",
            type = "resource",
        },
        first = {
            uri = "pas:first",
            label = "First child",
            type = "resource",
            range = {brick = true},
            system = true,
        },
        pref_rep = {
            uri = "pas:hasPreferredRepresentation",
            label = "Preferred representation",
            description = "Preferred representation. Used to generate \z
                a thumbnail (for a visual item) or sample (for non-visual \z
                materials such as audio).",
            type = "resource",
            range = {file = true},
        },
        has_file = {
            uri = "pas:hasFile",
            label = "Related file",
            type = "resource",
            range = {file = true},
        },
        date = {
            uri = "pas:date",
            label = "Date",
            description = "Date related to the artifact.",
            type = "string",
        },
        location = {
            uri = "pas:locationDescription",
            label = "Location",
            description = "Generic information about the artifact's location.",
            type = "string",
        },
    },
}