This website is archiving the documentation of versions prior to 7.3. You can visit the New Bonita BPM Documentation website for versions 7.3 and greater.
Documentation- Legacy -
This page explains the features of Bonita BPM Studio that enable you to use expressions and scripts.
Starting the expression editorManaging Groovy scriptsUsing variables in a script expressionLog messages in a Groovy script
Note that the expression editor cannot be used in the UI designer, which has a different concept model for data.