Hi @kartheek_a ,When you select event type as 'Rule Based' you must
select an event schema and its field on which you want to trigger a
journey. This indicates, throughout the journey you only can make use of
fields which are part of same event schema. It means one can't use other
event schema fields in journey. However you can use profile schema
fields regardless of which schema they belongs to in journey for
personalization. Thanks to union of profile schema feature. Hope this
helps