---
description: Browse the OPC UA Standard feature pages covering Track In, Recipe Download, Data Collection, Track Out, Abort, and State Synchronization.
alias: userguide-equipment-integration-opcua-standard-features
---

# Features

Each feature page contains its business purpose, node contract, communication-flow diagram, step-by-step behavior, failure behavior, assumptions, and validation checks.

| Feature                                           | Direction                 | Trigger                                          |
| ------------------------------------------------- | ------------------------- | ------------------------------------------------ |
| [Track In](track-in.md)                           | Machine or operator → MES | Operation request or MES UI operation            |
| [Recipe Download](recipe-download.md)             | MES → Machine             | Successful recipe resolution during **Track In** |
| [Data Collection](data-collection.md)             | Machine → MES             | `MachinePostDataRequest`                         |
| [Track Out](track-out.md)                         | Machine or operator → MES | Operation request or MES UI operation            |
| [Abort](abort.md)                                 | Machine or operator → MES | Operation request or MES UI operation            |
| [State Synchronization](state-synchronization.md) | Machine → MES             | Machine state value change                       |

Read [Operation Handshake](operation-handshake.md) first for the ownership, ordering, missing-acknowledgement, reset, and idempotency rules shared by **Track In**, **Track Out**, and **Abort**.

Use the [Node Reference](node-reference.md) for the fixed node paths, dynamic Parameter patterns, data types, ownership, access, and initial values that support these feature flows.