Companion Specifications —
already built.
You write business logic.

// MES: send a new job order to a machine (typed)
// NuGet: Opc.UaFx.Advanced.ISA95.JobControl
using Opc.UaFx;
using Opc.UaFx.Client;
using Opc.UaFx.ISA95.JobControl;

using var client = new OpcClient("opc.tcp://cnc-5x-01:4840");
client.Connect();

// Build the job order as a typed C# object
var jobOrder = new OpcISA95JobOrder
{
    JobOrderID = "JO-2026-042",
    StartTime  = DateTime.UtcNow,
    Priority   = 5,
    JobOrderParameters = new[] {
        new OpcISA95Parameter { ID = "Material", Value = "AlMg3" },
        new OpcISA95Parameter { ID = "BatchSize", Value = 42 },
    },
};

// Hand it to the machine's JobOrderReceiver
client.CallMethod(receiverObjectId, storeAndStartMethodId, jobOrder);

// Your SiOME model on a Machinery base — the Co-SDK handles the rest
// NuGet: Opc.UaFx.Advanced.Machinery
using Opc.UaFx;
using Opc.UaFx.Server;
using Opc.UaFx.Machinery;

internal class AcmeCncManager : OpcNodeManager
{
    public AcmeCncManager()
        : base("http://acme.example/cnc/")
    {
    }

    // Your NodeSet modeled in SiOME — single source of truth
    protected override IEnumerable<OpcNodeSet> ImportNodes()
    {
        yield return OpcNodeSet.Load(@"AcmeCNC.NodeSet2.xml");
    }
}

// Machinery spec + your model on top, in a single call
using var server = new OpcMachineryServer(new AcmeCncManager());
server.Start();