Allegrograph Rdf Store

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ALLEGROGRAPH RDF STORE Database and the Web (CSC8711) Ruku Roychowdhury Shagun Kariwala OUTLINE Introduction How does it work? Programming API Examples Gruff Current projects Conclusion INTRODUCTION AllegroGraph is a graph database to develop semantic web applications. Developed by Franz Inc. Stores data in triple format. Disk based RDF database. It has Java, Python, Lisp, Prolog interfaces. Supports SPARQL, Prolog, TwinQL through APIs. HOW DOES IT WORK? AllegroGraph runs as a service. It can work with large variety of programming interfaces like Java, Lisp. Although it’s called a “triple”, each triple has five fields. Subject Predicate Object Graph ID – stands for triple identifier CONTINUE … Generate 12 byte unique identifier for each string in the triple store. It indexes the triple for better query performance. Six index flavors are enabled by default. This index set can be customized by adding or deleting indices. PROGRAMMING API (JAVA) Create Triple Store Load data set / add triple Run SPARQL query Delete triple Delete triple store GRUFF (ALLEGROGRAPH BROWSER) Interactive triple-store browser, query manager, editor for AllegroGraph. Create triple store, generate graph, perform query. Three Views Graph Table Supports visual query. CURRENT PROJECTS Commercial projects Defense projects Open source projects (DBPedia Deutschland) TwitLogic CONCLUSION Scalability and retrieval speed makes AllegroGraph unique. It has built in RDFS++ reasoner. Support many languages and interfaces. Future version will support C# and Ruby. Compliant with RDF , RDFS, OWL, SPARQL, Prolog, OWL-lite reasoning Gruff makes data retrieval more pleasant through visual graph. .

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