[jboss-jira] [JBoss JIRA] (DROOLS-2451) Manage empty relation cell as null

Manage empty relation cell as null ---------------------------------- Key: DROOLS-2451 URL: https://issues.jboss.org/browse/DROOLS-2451 Project: Drools Issue Type: Enhancement Components: DMN Editor Reporter: Matteo Mortari Assignee: Matteo Mortari Following [DROOLS-2439] convention to adopt an empty cell inside a Relation has the same semantic of a null LiteralExpression. The wb converters/marshaller should take this into account while transforming from the kie-dmn-model to the WB model.