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System AllegroGraph IBM DB2
 Name AllegroGraph IBM DB2
 Version AllegroGraph 6.4.2 [2018-06-18] Last Stable Release 11.1 , released in april 2016
 Drawbacks NA high license costs. Applicable for transaction systems in large enterprises
 Advantages -Database being explicitly pre-structured
-Data to self-define the schema at the time of ingest
-Able to connect concepts, properties, and entities across multiple databases and without further coding to extract new, actionable business insights from your data
ACID compliant.
 Website www.allegrograph.com,
 Languages Supported Java, Python, Ruby, Perl, C#, Clojure and Common Lisp C C# C++ Cobol Delphi Fortran Java JCL Perl PHP Python Ruby Visual Basic
 JSON Support yes yes
 XML Support yes yes
 Brief description -Modern, high-performance, persistent graph database
-Uses efficient memory utilization in combination with disk-based storage, enabling it to scale to billions of quads while maintaining superior performance
-Supports SPARQL, RDFS++ and Prolog reasoning from numerous applications
IBM Db2 was the name introduced by IBM in 1983. The names DB2(tm) and Db2(tm) refer to database-server products developed by IBM. IBM Researchers invented Relational model and SQL Format.
 Database Model Graph Database, A triplestore or RDF store Primarily a relational database
 Technical Documentation franz.com/agraph/support/documentation/current/agraph-introduction.html www.ibm.com/­support/­knowledgecenter/­SSEPGG
 License Commercial Commercial
 Cloud-based / SaaS No Available in AWS, Azure Clouds. Available as a SaaS option in IBM Cloud
 Implementation Language Common Lisp C,C++
 Operating System Supported Windows, Linux, and Mac OS X Linux Windows
 Options for Integration / Access API Java, Python, Common Lisp and other APIs JSON Query, Xquery, JDBC, ODBC
 Consistency Yes Highly Consistent
 Foreign Keys No Yes
 Streaming Support Yes No
 Data Storage Schema Yes Relational Database
 Analytics Support Yes, AllegroGraph Recognized Among Top 10 Analytics Solution Providers by Pharma Tech Outlook for 2016 Need to buy Netezza
 Notable Users -- Most of the Fortune 500 Companies
 Key Differentiator -- Go To Database for IBM Mainframe Systems
 Concurrency -- Yes
 Partitioning -- No
 Replication -- Yes
 Secondary Indexes -- Yes
 SchemaLess -- No
 SQL Query -- Yes