---
title: "Mapping Processor"
slug: "mapping-processor"
updated: 2024-11-26T21:57:03Z
published: 2024-11-26T21:57:03Z
canonical: "help.tritondigital.com/mapping-processor"
---

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

# Mapping Processor

The **Mapping Processor** is the only processor that is necessary to the processing chain. It specifies which RAS message attributes fit where in the cue point. It also specifies default values and allows us to overwrite existing cue attributes.

| **Param name** | **Mandatory** | **Description** | **Default Value** | **Possible Value** |
| --- | --- | --- | --- | --- |
| key | Yes | Name of the attribute we will be assigning to. |  | Not null. |
| value | Yes | Source of the attribute value. This can be any static string, or it can be a combination of RAS message attributes (specified by `{}`). E.g.: `{song} played by {artist}` |  | Not null. |
| override | No | Assign attribute even if attribute already has a value. | false | true, false. |

**Example XML:**

```xml
<MappingProcessor>
   <WhiteList>
     <Item key="category" value="COM*" />
   </WhiteList>
   <BlackList>
     <Item key="category" value="COM99" />
   </BlackList>
   <MappingItems>
     <MappingItem key="type" value="ad" />
     <MappingItem key="ad_type" value="break" override="true" />
   </MappingItems>
   <NextProcessors>
   </NextProcessors>
</MappingProcessor>
```