text/rembrandtjaccuse/1 matches the site

public static LinguisticObject Jaccuse_Parts()
{
    var jaccuse = new LinguisticObject()
        .WithContext()
        .WithId("https://linked.art/example/text/rembrandtjaccuse/1")
        .WithLabel("Rembrandt's J'accuse");

    jaccuse.CreatedBy = new Creation();
    jaccuse.CreatedBy.TimeSpan = LinkedArtTimeSpan.FromYear(2008).WithLabel("2008");

    var directorActivity = new Creation()
        .WithClassifiedAs(Aat.Term("300025654", "Director"));
    directorActivity.CarriedOutBy = [
        new Person().WithId("https://linked.art/example/person/greenaway").WithLabel("Peter Greenaway")
    ];
    var producerActivity = new Creation()
        .WithClassifiedAs(Aat.Term("300197742", "Producer"));
    producerActivity.CarriedOutBy = [
        new Person().WithId("https://linked.art/example/person/wolting").WithLabel("Femke Wolting")
    ];
    jaccuse.CreatedBy.Part = [
        directorActivity,
        producerActivity
    ];

    return jaccuse;
}

• Terms outside the registry The vocabulary registry holds only the terms linked.art itself publishes, so a dataset's own concepts, places and people are written with Aat.Term, Tgn.Place and Ulan.Person, giving the id and the label.

var linguisticObject = new LinguisticObject
{
    Context = ["https://linked.art/ns/v1/linked-art.json"],
    Id = "https://linked.art/example/text/rembrandtjaccuse/1",
    Label = "Rembrandt's J'accuse",
    CreatedBy = new Creation
    {
        TimeSpan = new LinkedArtTimeSpan
        {
            Label = "2008",
            BeginOfTheBegin = new LinkedArtDate(2008, 1, 1),
            EndOfTheEnd = new LinkedArtDate(2008, 12, 31, 23, 59, 59),
        },
        Part =
        [
            new Creation
            {
                ClassifiedAs = [Aat.Term("300025654", "Director")],
                CarriedOutBy =
                [
                    new Person
                    {
                        Id = "https://linked.art/example/person/greenaway",
                        Label = "Peter Greenaway",
                    },
                ],
            },
            new Creation
            {
                ClassifiedAs = [Aat.Term("300197742", "Producer")],
                CarriedOutBy =
                [
                    new Person
                    {
                        Id = "https://linked.art/example/person/wolting",
                        Label = "Femke Wolting",
                    },
                ],
            },
        ],
    },
};

Generated from the object the example builds: every property that is set, as object initialisers, with the vocabulary constants where a term is in the registry. The fluent helpers are a convenience, not a requirement; this form and the one as written produce the same JSON.