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

# Referencing variables

## Syntax for nodes

For a variable called favColour:

* `contact.favColour` - this references the `favColour` contact attribute.
* `3.favColour` - this references the `favColour` extract variable from the node with staticId = 3.

## Syntax for edges

Edges syntax

For a variable called favColour:

* `message.favColour` - This is used on an edge filter to reference an extract variable from the previous node.

* `context.favColour` - this is used on an edge filter to reference a variable from the environment of the pipeline run (could be from the contact, could be from any other node execution in the pipeline)