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System AWS DynamoDB Ontotext
 Name Amazon DynamoDB GraphDB / Ontotext
 Version released Jan 2012 8.5.0 as of 2018-March
 Drawbacks Very few features when compared to other key-value stores NA
 Advantages Managed Database Service provided by a leading cloud provider Quick and easy to setup. Performance very fast
 Languages Supported Java, Node.js, Go, C# .NET, Perl, PHP, Python, Ruby, Haskell and Erlang. NA
 Website aws.amazon.com/­dynamodb www.graphdb.ontotext.com
 XML Support no no
 JSON Support yes yes
 Brief description Amazon DynamoDB is a fully managed proprietary NoSQL database service that supports key-value and document data structures[2] and is offered by Amazon.com as part of the Amazon Web Services portfolio Graph Database based on RDF. Helps to build a data platform. Native support for text search.Support for a database cluster.
 Database Model Key Value Model RDF Store, Graph Database
 Technical Documentation aws.amazon.com/­documentation/­dynamodb graphdb.ontotext.com/documentation
 License commercial on aws cloud. commercial. Community edition can be used perpetually
 Cloud-based / SaaS Yes but you can download dynamod db locally as well. Local installation does not have vendor support Amazon AMI available
 Implementation Language C++ NA
 Operating System Supported Linux , OS X, Windows Linux , OS X, Windows
 Options for Integration / Access API Rest API Java API , RDF4j API,SPARQL 1.1, GeoSPARQL, GraphQL?
 Consistency Immediate consistency Eventual consistency
 Foreign Keys No No
 Streaming Support No No
 Analytics Support NA Yes. Native text search and probalisitic capabalities
 Data Storage Schema Key Value Model RDF
 Notable Users As per Amazon the solution has been deployed by around 100,000 customers --
 Key Differentiator Amazon allows developers to purchase a service based on throughput, rather than storage. --
 Concurrency Yes --
 Partitioning Sharding --
 Replication Multi Data Center Replication supported --
 Secondary Indexes Yes --
 SchemaLess Yes --
 SQL Query No --