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

# Document Splitter activities

> Build a Document Splitter skill's processing flow — chain Classify, Extraction Rules, NLP, and Customize activities ending with a Splitter Script activity.

The **Activities** tab is where you build the document processing flow for a Document Splitter skill. Chain activities to determine the order of operations on each page.

## Splitter Script activity (required)

Every Document Splitter skill ends with a mandatory [Splitter Script activity](/vantage/documentation/advanced-designer/activities/splitter-script/splitter-script). The script decides which pages start a new document, based on data extracted by upstream activities.

## Available upstream activities

Add any of the following between **Start** and the Splitter Script activity:

* [Classify activities](/vantage/documentation/advanced-designer/activities/activities#classify)
* [Extract from semi-structured](/vantage/documentation/advanced-designer/activities/activities#extract-from-semi-structured)
* [Extract from text (NLP)](/vantage/documentation/advanced-designer/activities/activities#extract-from-text-nlp)
* [Customize activities](/vantage/documentation/advanced-designer/activities/activities#customize)

## Conditional branching

The IF activity lets you branch the flow based on a condition. You can also implicitly fork the flow by creating a workflow item that contains several [Extraction Rules activities](/vantage/documentation/advanced-designer/activities/extraction-rules/extraction-rules) and mapping each to a value of a chosen field.

## Related topics

* [Splitter Script activity](/vantage/documentation/advanced-designer/activities/splitter-script/splitter-script)
* [Activities in Advanced Designer](/vantage/documentation/advanced-designer/activities/activities)
* [Documents tab in Document Splitter skills](/vantage/documentation/advanced-designer/document-splitter/splitter-documents)