---
title: "Get XML Schema"
slug: "get-xml-schema"
updated: 2024-03-14T14:45:06Z
published: 2024-03-14T14:45:06Z
canonical: "documentation.decisions.com/get-xml-schema"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://documentation.decisions.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Get XML Schema

| ## Step Details |
| --- |
| **Introduced in Version** | 4.0.0 |
| **Last Modified in Version** | 7.12.0 |
| **Location** | Data > XML |

The **Get XML Schema** step creates and outputs the XML Schema for a Decisions datatype.

---

## Properties

#### Inputs

| Property | Description | Data Type |
| --- | --- | --- |
| Type Name | The full type name for the Decisions datatype | DecisionsType |

#### Outputs

| Property | Description | Data Type |
| --- | --- | --- |
| XML Schema | The XML Schema for the selected datatype | String |

---

## Example

1. Within the platform, create a Datatype to be converted into an XML Schema. For this example, a simple **Database Structure** shown below.  
![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/Screenshot%202024-03-13%20154947.png)
2. Pick or create a Flow. Then, select the **Get XML Schema** step by navigating to **DATA > XML** within the **Toolbox.****![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/Screenshot%202024-03-13%20150305.png)**
3. In the **Properties** panel for the **Get XML Schema** step, enter the **Type Name** under **Inputs.** Please note that the Input Mapping MUST be set to **Constant**, otherwise it will give the user an error. Once the **Type Name** has been set to **Constant,** select the datatype from the dropdown menu. Once that is complete, connect the **Done** and **No Matches Found** paths to the **End** step to complete the Flow.  
![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/Screenshot%202024-03-13%20155254.png)
4. Once the Flow is complete, Select **Debug** and then **Start Debugging**. This will test the Flow to ensure it is working correctly, and will also show the user the XML Schema output.  
![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/Screenshot%202024-03-13%20155358.png)

---

## Common Errors

### Error Changing type from [datatype] to DecisionsType

The following error appears when the **Select From Flow** input mapping is used rather than **Constant.** The step is unable to cast the type as a DecisionsType, throwing the error.

#### Exception Message:

```cpp
Exception Stack Trace: DecisionsFramework.Design.Flow.ErrorRunningFlowStep: Error running step Get XML Schema 1[GetXMLSchemaStep] in flow [Testing Flow]: Error Converting Type Name [Parent None]. Error changing type from ExampleDBStructure to DecisionsType ---> System.Exception: Error Converting Type Name [Parent None]. Error changing type from ExampleDBStructure to DecisionsType ---> System.InvalidOperationException: Invalid type conversion. 'DecisionsType' not assignable from 'ExampleDBStructure'.
   at DecisionsFramework.Utilities.Data.DecisionsTypeHelper.ChangeType(Object value, DecisionsType targetType, Boolean convertToGenerated, Boolean isList, String errorMessage, Object[] errorParams) 
   --- End of inner exception stack trace ---
   at DecisionsFramework.Utilities.Data.DecisionsTypeHelper.ChangeType(Object value, DecisionsType targetType, Boolean convertToGenerated, Boolean isList, String errorMessage, Object[] errorParams)
   at DecisionsFramework.Design.Flow.Mapping.InputImpl.SelectValueInputMapping.GetInputValue(IDataConsumer consumer, FlowStateData currentData, DecisionsType expectedType, Boolean expectingArray, String valueName, Object parentObject, Boolean canBeNull)
   at DecisionsFramework.Design.Flow.FlowStep.BuildMappingData(FlowStateData data)
   at DecisionsFramework.Design.Flow.FlowStep.Start(String flowTrackingID, String stepTrackingID, FlowStateData data, AbstractFlowTrackingData trackingData, RunningStepData currentStepData) 
   --- End of inner exception stack trace ---
```