return {
    uri = "pas:File",
    label = "File",
    broader = "anything",

    properties = {
        source_path = { min_cardinality = 1 },
        archive_path = {
            uri = "pas:archivePath",
            label = "Archival path",
            description = "Path of the preserved resource, relative to the \z
                archival root.",
            type = "string",
            min_cardinality = 1,
            max_cardinality = 1,
        },
        next = {
            range = {Part = true, File = true},
            max_cardinality = 1,
        },
        format = {
            uri = "dc:format",
            label = "MIME type",
            type = "string",
            min_cardinality = 1,
            max_cardinality = 1,
        },
        size = {
            uri = "dc:extent",
            label = "File size",
            description = "File size in bytes.",
            type = "integer",
            min_cardinality = 1,
            max_cardinality = 1,
        },
        checksum = {
            uri = "premis:hasMessageDigest",
            label = "Checksum",
            description = "File checksum formatted as an URN: \z
                `<algorithm>:<hex digest>`",
            type = "ext_resource",
            min_cardinality = 1,
        },
    }
}