Publications

Implementations Based Evaluation of No-Wait Approach for Resolving Conflicts in Databases

In this paper, we describe No-Wait concurrency control mechanisms to address conflict resolution and then comprehensively evaluate …
Yingming Wang, Paul Ezhilchelvan, Jack Waudby, Dr. Jim Webber

BIFROST: A Future Graph Database Runtime

BIFROST is a novel query engine for graph databases that supports high-fidelity data modeling on arbitrary and evolving graph …
James Clarkson, Georgios Theodorakis, Dr. Jim Webber
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An Empirical Evaluation of Variable-length Record B+Trees on a Modern Graph Database System

B+Trees are widely used as persistent index implementations for databases. They are often implemented in a way that allows the index to …
Georgios Theodorakis, James Clarkson, Dr. Jim Webber
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Aion: Efficient Temporal Graph Data Management

Modern graph database management systems (DBMSs) can process highly dynamic labeled property graphs (LPGs) with many billions of …
Georgios Theodorakis, James Clarkson, Dr. Jim Webber
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Analysis of an epoch commit protocol for distributed processing systems

A policy that reduces communication overheads by commit- ting together all transactions completed within an interval of time is …
Paul Ezhilchelvan, Isi Mitrani, Dr. Jim Webber
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Building Knowledge Graphs - A Practitioner's Guide

A practitioner’s guide to building Knowledge Graphs for the enterprise.
Jesùs Barrasa, Dr. Jim Webber
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Building Knowledge Graphs - A Practitioner's Guide

Evaluating the Performance of No-Wait Approach to Resolving Write Conflicts in Databases

A model of a large distributed database, where write conflicts are handled by wait-free aborting of transactions, is introduced. and …
Paul Ezhilchelvan, Isi Mitrani, Dr. Jim Webber, Yingming Wang
DOI

Database system with transactional commit protocol based on safe conjunction of majorities

A database system with a transactional commit protocol based on a safe conjunction of majorities is disclosed. In various embodiments, …
Tobias Lindaaker, Dr. Jim Webber
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Bi-gram cardinality estimation in a graph database

A method and apparatus for estimating the cardinality of graph pattern queries using graph statistics and metadata is presented. In …
Niels De Jong, Dr. Jim Webber
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Pre-emptive graph search for guided natural language interactions with connected data systems

Techniques are disclosed to provide guided natural language interactions with a connected data system, such as a graph database. In …
Irfan Nuri Karaca, Alistair Philip Campbell Jones, Dr. Jim Webber
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Graph database system to safely store data at high volume and scale

Techniques are disclosed to safely and performantly store data in a distributed graph database. In various embodi- ments, a combination …
Dr. Jim Webber, Hugo Firth
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A Performance Study of Epoch-based Commit Protocols in Distributed OLTP Databases

A performance study that identifies workload factors which make it more effective in preventing transaction aborts and concludes that the analytical models can be useful in predicting performance.
Jack Waudby, Paul Ezhilchelvan, Isi Mitrani, Dr. Jim Webber
DOI

Pick & Mix Isolation Levels: Mixed Serialization Graph Testing

Concurrency control is an integral component in achieving high performance in many-core databases. Implementing serializable …
Jack Waudby, Paul Ezhilchelvan, Dr. Jim Webber
DOI

Knowledge Graphs

A short introduction to Knowledge Graphs for CIOs, CDOs, and data managers.
Jesùs Barrasa, Amy E. Hodler, Dr. Jim Webber
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Knowledge Graphs

The Coming of Age of Graph Databases

A short introduction to Neo4j and Cypher from the viewpoint of someone who has been with the technology for a long time.
Dr. Jim Webber

Modeling the Gradual Degradation of Eventually-Consistent Distributed Graph Databases

Eventually consistent distribted graph databases corrupt data. This paper shows the rate at corruption leading to abandomment of a database and provides calibrated tools for reasoning about the spread of corruption in production databases.
Paul Ezhilchelvan, Isi Mitrani, Dr. Jim Webber
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Graph Databases for Dummies

A practice and humane introduction to graph databases and Neo4j, Graph Databases For Dummies walks you through modeling, querying, and importing graph data, all the way through to your first production system.
Dr. Jim Webber, Rik Van Bruggen
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Graph Databases for Dummies

Preserving reciprocal consistency in distributed graph databases

Reciprocal consistency is at the heart of dependable distributed graph databases. This work examines methods for preserving reciprocal consistency and thus data correctness.
Jack Waudby, Paul Ezhilchelvan, Dr. Jim Webber, Isi Mitrani
DOI

Design and Evalution of an Edge-based Concurrency Protocol for Distributed Graph Databases

A novel concurrency control mechanism for distributed graph databases that aborts any transaction that could introduce inconsistencies, along with peformance evaluation
Paul Ezhilchelvan, Isi Mitrani, Jack Waudby, Dr. Jim Webber
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Method and apparatus for ensuring consistent outcomes in updates to distributed databases

Methods of conducting database transactions. One such method comprises receiving data to be written to a database; identifying a set of …
Dr. Jim Webber, Ian S. Robinson, Tobias Lindaaker, Alistair Philip Campbell Jones
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ACTiCLOUD: Enabling the Next Generation of Cloud Applications

An overview of the ACTiCLOUD project for adaptable, data-intensive cloud workloads.
Georgios Goumas, Konstantinos Nikas, Ewnetu Bayuh Lakew, Christos Kotselidis, Andrew Attwood, Erik Elmroth, Michail Flouris, Nikos Foutris, John Goodacre, Davide Grohmann, Vasileios Karakostas, Panagiotis Koutsourakis, Martin Kersten, Mikel Lujàn, Einar Rustad, John Thomson, Luis Tomás, Atle Vesterkjaer, Dr. Jim Webber, Ying Zhang, Nectarios Koziris
DOI

Graph database devices and methods for partitioning graphs

A method and apparatus for partitioning a graph database that includes nodes connected to one another is presented. The method entails …
Dr. Jim Webber, Ian S. Robinson, Tobias Lindaaker, Alistair Philip Campbell Jones
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Investigations on path indexing for graph databases

Results of an investigation into path indexing for graph databases.
Jonathan Sumrall, George H. L. Fletcher, Alexandra Poulovassilis, Johan Svensson, Magnus Vejlstrup, Chris Vest, Dr. Jim Webber
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Graph Databases

The first book on graph databases, now in its second edition. Provides in-depth coverage of graph modeling and querying, as well as thorough explanations of the internal workings of Neo4j.
Ian Robinson, Dr. Jim Webber, And Emil Eifrem
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Graph Databases

Starting Graph Databases with Neo4j 2.0

An article on starting out with graphs and Neo4j 2.0, with a focus on the Cypher query language.
Dr. Jim Webber

A programmatic introduction to Neo4j

A tutorial for learning to program with Neo4j’s graph model.
Dr. Jim Webber
DOI

Towards a Horizontally Scalable Graph Database

Prelimary work on support for supporting very large data sets in graph databases.
Dr. Jim Webber
Website

Exterminate! Your Database Woes with Neo4j

How to build a graph model in Neo4j, with examples from the long history of Doctor Who!
Dr. Jim Webber, Ian Robinson

Rest in Practice

Why don’t typical enterprise projects go as smoothly as projects you develop for the Web? Does the REST architectural style …
Dr. Jim Webber, Savas Parastatidis, Ian Robinson
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Rest in Practice

The Role of Hypermedia in Distributed System Development

Demonstrating practical RESTful business protocols with framework support from Restfulie.
Savas Parastatidis, Dr. Jim Webber, Guilherme Silveira, Ian Robinson
Website

SSDL - The SOAP Service Description Language

Simplifying Web Services interfaces in the general case, and making it possible to perform model checks on multi-party protocols.
Savas Parastatidis, Dr. Jim Webber, Simon Woodman, Dean Kuo, Paul Greenfield
Website

Soya: a Programming Model and Runtime Environment for Component Composition using SSDL

An implementation of SSDL tooling and an empirical demonstration of how developers can readily use SSDL to build robust services and systems of services.
Patric Fornasier, Dr. Jim Webber, Ian Gorton
LNCS

Secure and Provable Service Support for Human-Intensive Real-Estate Processes

A realistic workflow appliation for real-estate using SSDL to reason about correctness of multiparty protocols over the Internet.
Emerson Ribeiro De Mello, Savas Parastatidis, Philipp Reinecke, Chris Smith, Aad Van Moorsel, Dr. Jim Webber
DOI

Expressing and Reasoning about Service Contracts in Service-Oriented Computing

Using SSDL to reason about message exchange patterns (or business protocols) between autonomous services.
Dean Kuo, Alan Fekete, Paul Greenfield, Surya Nepal, John Zic, Savas Parastatidis, Dr. Jim Webber
DOI

Asynchronous messaging between Web services using SSDL

An overview of the SOAP Service Description Language (SSDL) and its support for multi-party end-to-end business protocols.
Savas Parastatidis, Simon Woodman, Dr. Jim Webber, Dean Kuo, Paul Greenfield
DOI

An Architect’s Guide to Developing Enterprise Web Services

A companion update to the Developing Enterprise Web Services book after two years additional standards work.
Dr. Jim Webber

First International Workshop on Design of Service-Oriented Applications (WDSOA'05)

Organising and editing the proceedings of a workshop on the design of service-oriented systems alongside ICSOC 2005.
Jen-Yao Chung, George Feuerlicht, Dr. Jim Webber
Proceedings

Service-oriented, Distributed, High-Performance Computing

An article on High Performance Computing (HPC) Grids built with SOA.
Savas Parastatidis, Dr. Jim Webber

WS‐GAF: a framework for building Grid applications using Web Services

A mapping of requirements for global scale grid computing onto standard Web Services protocols.
Savas Parastatidis, Dr. Jim Webber, Paul Watson, Thomas Rischbeck
DOI

Web Service Grids: An Evolutionary Approach

A roadmap for protocol standardisation to ease the adoption of e-science and grid computing technology.
Malcolm Atkinson, David DeRoure, Alistair Dunlop, Geoffrey Fox, Peter Henderson, Tony Hey, Norman Paton, Steven Newhouse, Savas Parastatidis, Anne Trefethen, Paul Watson, Dr. Jim Webber
DOI

Assessing the Risk and Value of Adopting Emerging and Unstable Web Services Specifications

A framework for reasoning about an immature and chaotic set of protocols and standards for building potentially long-lived systems.
Savas Parastatidis, Dr. Jim Webber
DOI

Grid Computing using Web Services Technologies

Showing how large-scale Grid computing designed as a service-oriented architecture and implemented by standard Web Services.
Savas Parastatidis, Paul Watson, Dr. Jim Webber

The WS-GAF Registry Service

The WS-GAF Registry Service is a naming and metadata service which allows clients to late bind (in a limited fashion) to services as part of a larger grid application.
Savas Parastatidis, Dr. Jim Webber

Stateful Interactions in Web Services: A Comparison of WS-Context and WS-ResourceFramework

An article how two competing/overlapping protocols each support the notion of conversational state in a system of Web Services.
Dr. Jim Webber, Savas Parastatidis, Mark Little

Why WSDL is not Yet Another Object IDL

An article about how WSDL should be considered a contract language for message exchanges, rather than an IDL for object interactions.
Dr. Jim Webber, Savas Parastatidis

Horses for Courses: Services, Objects, and Loose Coupling

An article on the differences between loose coupling in object-oriented and service-oriented systems, and how treating services like remote objects leads to tight coupling.
Dr. Jim Webber, Savas Parastatidis

Introducting WS-CAF

An overview of the three-layered WS-CAF framework for distributed context, coordination, and transactions.
Dr. Jim Webber, Mark Little

Developing Enterprise Web Services

This was one of the first books to demonstrate how to build (WS-*) Web Services with enterprise-class reliability, and performance. …
Sandeep Chatterjee, Dr. Jim Webber
Developing Enterprise Web Services

Demystifying Service Oriented Architectures

An article on designing services in a Service-Oriented Architecture.
Dr. Jim Webber, Savas Parastatidis

OASIS Web Services Composite Application Framework (WS-CAF)

Defining an open framework for supporting coordinated and transactional compositions of multiple Web services applications.
Jan Alexander, Doug Bunting, Martin Chapman, Mark Little, Jeff Mischkinsky, Dale Moberg, Ramesh Nagappan, Eric Newcomer, Keith Swenson, Dr. Jim Webber, Pete Wenzel
Website

Introducing BPEL4WS

The final article in a series of articles on safely executing complex business protocols over Web Services. This focuses on business processes supported by transactional Web Services.
Dr. Jim Webber, Mark Little

Introducting WS-Transaction

The second and third in a series of articles on safely executing complex business protocols over Web Services. This focuses on atomic transactions and business activities layered atop WS-Coordination.
Dr. Jim Webber, Mark Little

Introducting WS-Coordination

The first in a series of articles on safely executing complex business protocols over Web Services. This focuses on coordination as a general mechanism.
Dr. Jim Webber, Mark Little

Coordinating Business Transactions on the Web

An overview of the OASIS Business Transactions Protocol for reaching agreement on the Internet.
Sanjay Dalal, Mark Little, Mark Potts, Sazi Temel, Dr. Jim Webber
DOI

Building Transactional Web Services with OASIS BTP

A two-part article on building and composing transactional Web Services.
Dr. Jim Webber, Mark Little

The Misplaced Comma: Programmers’ Tales and Traditions

Thinking about how programmers interact, the stories they tell, and how they impact software engineering.
Lindsay Marshall, Dr. Jim Webber
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The Smart Money's on OASIS BTP

A guest editorial on using OASIS BTP execute transactions between Web Services.
Dr. Jim Webber

Making Web Services Work

Magazine article on using OASIS BTP to enable transactions between Web Services.
Dr. Jim Webber, Victor Corrales, Mark Little, Savas Parastatidis

Visual, Object-Oriented Development of Parallel Applications

A visual, object-oriented parallel programming language for non-specialists.
Dr. Jim Webber, P.A. Lee
DOI

Visual Object-Oriented Development of Parallel Applications

My Ph.D. thesis on visual programming for high peformance computing.
Dr. Jim Webber
Thesis

Visual, Object-Oriented Development of Parallel Applications

The Vorlon hybrid textual-visual parallel programming language.
Dr. Jim Webber, P.A. Lee

Gotos Considered Harmful and Other Programmers' Taboos

Thinking about programmers’ susperstitions and taboos and the effects they have on software development.
Lindsay Marshall, Dr. Jim Webber
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