Victor Tan

Publications of Victor Tan

• The provenance of electronic data.

  Authors: Luc Moreau, Paul T. Groth, Simon Miles, Javier Vázquez-Salceda, John Ibbotson, Sheng Jiang, Steve Munroe, Omer F. Rana, Andreas Schreiber, Victor Tan, László Zsolt Varga

  Commun. ACM. 01/2008; 51:52-58.

• Cluster Computing and Grid 2005 Works in Progress.

  Authors: Mark Baker, Aamir Shafi, Bryan Carpenter, Sylvia C. Wong, Victor Tan, Weijian Fang, Simon Miles, Luc Moreau

  IEEE Distributed Systems Online. 01/2005; 6.

• Grimoires: Grid Registry with Metadata Oriented Interface: Robustness, Efficiency, Security --- Work-in-Progress

  Authors: Sylvia C Wong, Victor Tan, Weijian Fang, Simon Miles, Luc Moreau

  Grid registries allow users to discover resources made available by Grid resource providers. In this paper, we present our on-going work on a next-generation registry, initially desgined as part ofGrid registries allow users to discover resources made available by Grid resource providers. In this paper, we present our on-going work on a next-generation registry, initially desgined as part of the myGrid project and to be part of the OMII Grid software release. Specifically, we discuss the support of semantic service descriptions and task/user-specific metadata, along with related performance and security considerations.

• Logical architecture strawman for provenance systems

  Authors: Luc Moreau, Liming Chen, Paul Groth, John Ibbotson, Michael Luck, Simon Miles, Omer Rana, Victor Tan, Steven Willmott, Fenglian Xu

  The purpose of this document is to propose a logical architecture for a provenance system. The logical architecture is specified independently of specific technologies. Specifically, we introduce ourThe purpose of this document is to propose a logical architecture for a provenance system. The logical architecture is specified independently of specific technologies. Specifically, we introduce our definition of provenance in the context of service-oriented architectures, and we identify the different roles that exist in a provenance system.

• Cluster Computing and Grid 2005 Works in Progress: Grimoires: A Grid Registry with a Metadata-Oriented Interface

  Authors: Sylvia C Wong, Victor Tan, Weijian Fang, Simon Miles, Luc Moreau

• The myGrid Notification Service

  Authors: Ananth Krishna, Victor Tan, Richard Lawley, Simon Miles, Luc Moreau

• A proof of concept design for provenance

  Authors: Fenglian Xu, Alexis Biller, Liming Chen, Victor Tan, Paul Groth, Simon Miles, John Ibbotson, Luc Moreau

  The utility of provenance is becoming apparent in many Grid and Web Service based applications, where there is frequently a need to trace back and understand the processes that lead to a specificThe utility of provenance is becoming apparent in many Grid and Web Service based applications, where there is frequently a need to trace back and understand the processes that lead to a specific result. The term provenance however lends itself to several possible conceptions, and our initial step in the EU Provenance project was to design and implement a simple system to articulate our conception of provenance. This system, termed the pre-prototype, is based on a conceptualized process for baking a Victoria Sponge Cake. This report describes the cake baking scenario, presents some provenance-type questions that can be asked about the baking process and provides an implementation of the cake baking process within a service-oriented architecture framework that can answer these questions using collated provenance data.

• A security architecture for a semantic Grid registry

  Authors: Victor Tan, Weijian Fang, Sylvia C Wong, Simon Miles, Luc Moreau

  Existing registry technologies such as UDDI can be enhanced to support capabilities for semantic reasoning and inquiry, which subsequently increases its usability range. The Grimoires registry wasExisting registry technologies such as UDDI can be enhanced to support capabilities for semantic reasoning and inquiry, which subsequently increases its usability range. The Grimoires registry was developed to provide such support through the use of metadata attachments to registry entities. The use of such attachments provides a way for allowing service operators to specify security assertions pertaining to registry entities owned by them. These assertions may however have to be reconciled with existing registry policies. A security architecture based on the XACML standard and deployed in the OMII framework is outlined to demonstrate how this goal is achieved in the registry.

• Performance Analysis of a Semantics Enabled Service Registry

  Authors: Weijian Fang, Sylvia C Wong, Victor Tan, Simon Miles, Luc Moreau

  Service discovery is a critical task in service-oriented architectures such as the Grid and Web Services. In this paper, we study a semantics enabled service registry, GRIMOIRES, from aService discovery is a critical task in service-oriented architectures such as the Grid and Web Services. In this paper, we study a semantics enabled service registry, GRIMOIRES, from a performance perspective. GRIMOIRES is designed to be the registry for myGrid and the OMII software distribution. We study the scalability of GRIMOIRES against the amount of information that has been published into it. The methodology we use and the data we present are helpful for researchers to understand the performance characteristics of the registry and, more generally, of semantics enabled service discovery. Based on this experimentation, we claim that GRIMOIRES is an efficient semantics-aware service discovery engine.

• An Architecture for Provenance Systems Executive Summary

  Authors: Paul Groth, Sheng Jiang, Simon Miles, Steve Munroe, Victor Tan, Sofia Tsasakou, Luc Moreau

• An Architecture for Provenance Systems

  Authors: Paul Groth, Sheng Jiang, Simon Miles, Steve Munroe, Victor Tan, Sofia Tsasakou, Luc Moreau

  This document covers the logical and process architectures of provenance systems. The logical architecture identifies key roles and their interactions, whereas the process architecture discussesThis document covers the logical and process architectures of provenance systems. The logical architecture identifies key roles and their interactions, whereas the process architecture discusses distribution and security. A fundamental aspect of our presentation is its technology-independent nature, which makes it reusable: the principles that are exposed in this document may be applied to different technologies.

• The Provenance of Electronic Data

  Authors: Luc Moreau, Paul Groth, Simon Miles, Javier Vazquez, John Ibbotson, Sheng Jiang, Steve Munroe, Omer Rana, Andreas Schreiber, Victor Tan, Laszlo Varga

  In the study of fine art, provenance refers to the documented history of some art object. Given that documented history, the object attains an authority that allows scholars to appreciate itsIn the study of fine art, provenance refers to the documented history of some art object. Given that documented history, the object attains an authority that allows scholars to appreciate its importance with respect to other works, whereas, in the absence of such history, the object may be treated with some skepticism. Our IT landscape is evolving as illustrated by applications that are open, composed dynamically, and that discover results and services on the fly. Against this challenging background, it is crucial for users to be able to have confidence in the results produced by such applications. If the provenance of data produced by computer systems could be determined as it can for some works of art, then users, in their daily applications, would be able to interpret and judge the quality of data better. We introduce a provenance lifecycle and advocate an open approach based on two key principles to support a notion of provenance in computer systems: documentation of execution and user-tailored provenance queries.

• Security Issues in a SOA-based Provenance System

  Authors: Victor Tan, Paul Groth, Simon Miles, Sheng Jiang, Steve Munroe, Sofia Tsasakou, Luc Moreau

  Recent work has begun exploring the characterization and utilization of provenance in systems based on the Service Oriented Architecture (such as Web Services and Grid based environments). One of theRecent work has begun exploring the characterization and utilization of provenance in systems based on the Service Oriented Architecture (such as Web Services and Grid based environments). One of the salient issues related to provenance use within any given system is its security. Provenance presents some unique security requirements of its own, which are additionally dependent on the architectural and environmental context that a provenance system operates in. We discuss the security considerations pertaining to a Service Oriented Architecture based provenance system. Concurrently, we outline possible approaches to address them.