---
alias: user-guide-ltpds
description: "Printable documents utilize a specific type for Lot Travelers, managing predefined context items automatically"
---

# Lot Traveler Printable Documents Specifics

**PrintableDocuments** that are to be used as Lot Traveler pages must have the *Type* set to Lot Traveler.

When a **PrintableDocument** is of *Type* Lot Traveler the system will have some specific behaviors, namely:

* The *AppliesTo* property will be ReadOnly and automatically set to Material
* The *PrinterType* property will be ReadOnly and automatically set to General
* A set of pre-defined Context Items will be added automatically (see below)

## Predefined Context Items

The system will automatically add three pre-defined Context Items to Lot Traveler **PrintableDocuments**, namely:

* **Step** - which will be filled with the **Step** object for which the Lot Traveler document is being printed
* **Flow** - which will be filled with the **Flow** object corresponding to the current Flow of the **Material** for which the Lot Traveler document is being printed
* *Flow Path* - which will be filled with the *FlowPath* string of the **Step** for which the Lot Traveler is being printed
* *LogicalFlowPath* - which will be filled with the *LogicalFlowPath* string of the **Step** for which the Lot Traveler is being printed

These Context Items cannot be removed by the user, and only the values of the *Description* and *StoreHistory* properties can be modified.

![Screenshot showing a diagram illustrating the step in the LogicalFlowPath.](../images/lot_traveler_contexts.png)

Also, the user cannot add additional Context Items of Type *Input*, but any number of Context Items of Type *Variable* can be added.