Liquid expressions

When working with Elsa, you'll often want to write dynamic expressions. This page provides a glossary of various filters and tags you can use, in addition to the standard set that you can find in the Liquid documentation.

Elsa uses the Fluid library to implement Liquid. More tags and filters can be found there, as well as details on providing your own tags and filters.

Utility

These are built-in Liquid filters that are common to most Liquid implementations.

Filter	Description	Example
`json`	Serializes the input into JSON.	`{{ some_value \| json }}`
`base64`	Converts the input into a base64 string.	`{{ some_value \| base64 }}`

Workflow

Object	Description	Example
`Variables`	Provides access to workflow variable values.	`{{ Variables.MyVariable }}`
`CorrelationId`	The correlation ID of the workflow.	`{{ CorrelationId }}`