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=== Morpheus: multiple graphs and composable graph queries in Apache Spark ===
The opencypher Morpheus project<ref name="CAPS Morpheus"/> implements Cypher for Apache Spark users. Commencing in 2016, this project originally ran alongside three related efforts, in which Morpheus designers also took part: SQL/PGQ, G-CORE and design of Cypher extensions for querying and constructing multiple graphs<ref name="MGCQ CIP">{{cite web|url=https://github.com/boggle/openCypher/blob/CIP2017-06-18-multiple-graphs/cip/1.accepted/CIP2017-06-18-multiple-graphs.adoc|title=''CIP2017-06-18 Querying and constructing multiple graphs''|last1=Taylor|first1=Andrés|last2=Plantikow|first2=Stefan|last3=Selmer|first3=Petra|date=2017-2018|website=|publisher=opencypher.org|accessdate=November 12, 2019}}</ref>. The Morpheus project acted as a testbed for extensions to Cypher (known as "Cypher 10") in the two areas of graph DDL and query language extensions.
Graph DDL features include<ref name="CAPS oCIM V">{{cite web|url=https://s3.amazonaws.com/artifacts.opencypher.org/website/ocim5/slides/ocim5+-+CAPS+%2B+GraphDDL.pdf|title=''Multiple graphs and composable queries in Cypher for Apache Spark''. openCypher Implementers Meeting V, Berlin.|last=Kiessling|first=Max|date=2019|website=|publisher=opencypher.org|accessdate=November 9, 2019}}</ref>
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{{AFC submission|||ts=20191112103027|u=A James Green|ns=118}}
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