Provides the definition of the Relation Service.
class
The Relation Service is in charge of creating and deleting relation types
and relations, of handling the consistency and of providing query
mechanisms.
Report a bug or suggest an enhancement For further API reference and developer documentation see the Java SE Documentation , which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples. Other versions. Java is a trademark or registered trademark of Oracle and/or its affiliates in the US and other countries. Copyright © 1993, 2022, Oracle and/or its affiliates, 500 Oracle Parkway, Redwood Shores, CA 94065 USA. All rights reserved. Use is subject to license terms and the documentation redistribution policy .