March/April 2013 (Vol. 28, No. 2) pp. 100-104
1541-1672/13/$31.00 © 2013 IEEE

Published by the IEEE Computer Society
The Web Science Observatory
Thanassis Tiropanis , University of Southampton

Wendy Hall , University of Southampton

Nigel Shadbolt , University of Southampton

David De Roure , University of Oxford

Noshir Contractor , Northwestern University

Jim Hendler , Rensselaer Polytechnic University
  Article Contents  
  Observing the Web  
  Building the Observatory  
  References  
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To understand and enable the evolution of the Web and to help address grand societal challenges, the Web must be observable at scale across space and time. That requires a globally distributed and collaborative Web Observatory.

The World Wide Web is the largest information fabric in history. People shop, date, trade, and communicate with one another using it. Scientists and researchers can't imagine theirwork without it. The Web is ubiquitous and pervasive, and like all things that become commonplace, we take it for granted. However, over the past few years there has been a growing recognition that the Web's ecosystem should be treated as an important and coherent area of study—this is Web Science.
Web Science emerged in 2006 as an interdisciplinary area to study the evolution of the Web and understand how it informs, shapes, and is shaped by human activity. 1 Bringing together researchers from different disciplines including computer science, the social sciences, law, and engineering, effective Web Science methods adopting both quantitative and qualitative approaches are becoming established across the growing research community.
The launch of Web Science was ambitious and timely, with developments since 2006 ushering in new challenges and opportunities both in terms of scale and scope. The success of online social networks, the emergence of new genres of social media such as microblogging, and the explosive growth of data made available on the Web offer an unprecedented opportunity for the conduct of Web Science at scale. 2 , 3 Notwithstanding the computational challenges they create, data on the use of search engines (such as Google analytics) or on topics trending in online services such as YouTube, Twitter, 4 and Wikipedia provide an increasingly accurate reflection of, and explanation for, social attitudes and behaviors.
In addition to scale, the conduct of Web Science is presented with challenges and opportunities in terms of scope. Even though it was launched in the West, the Web is increasingly a tapestry of multilingual and multicultural complexity. This diversity is revealing the computational limits of traditional search technologies and big data in Web Science research. As a result, it has spurred the development of new methodologies as well as visual-analytic and predictive tools that utilize archival as well as synthetic data. These methodologies and tools offer exciting new opportunities for Web Science to investigate and explain cultural differences and similarities. 5
To keep pace with the Web's growing scale and scope, Web Science research demands the development of new theories, the availability and interpretation of relevant data, effective and scalable multilevel analytic methods, and considerable computational infrastructure. This, then, is the motivation for a global project called the Web Observatory: an environment that will enable the next generation of interdisciplinary Web Science research involving mixed methods at a global scale. It seeks to empower researchers by providing a distributed, collaborative, scalable, and sustainable online environment to share data, analytic methods, and visualization tools to explore the sociotechnical evolution of the Web. In this respect, the Web Observatory project differs from other endeavors by focusing specifically on data about the Web (rather than all data on the Web), placing significant emphasis on interdisciplinary analysis and providing multilevel analytics on a global scale.
Observing the Web
We envision the Web Observatory as a global data resource and an open analytics environment to nurture Web Science research. To understand the factors that have driven the Web's growth, and to examine its current condition and anticipate future developments, the Web Observatory aims to provide a distributed archive of data and activity on the Web, as well as methodologies and tools to explore its evolution in the past and through time. By doing so, the Observatory enables live monitoring of the state of the Web in terms of topologies, resources, links, and activity. These include the availability of Web resources (documents and data), relationships among resources and activity in the context of social networks and open data, and state-of-the-art visual-analytics to advance explanatory models of the co-evolution of Web and society. The Observatory also enables simulation of the state of the Web at specific points in the past, and development of predictive models of Web evolution and of our engagement with or via the Web.
To realize its vision, the Web Observatory is conceived as a multi-stakeholder endeavor. It entails substantial intellectual and resource investments by academia, industry, and governments. In return, all of these stakeholders can accrue substantial benefits from the theoretical and practical insights gleaned on topics such as Web economics, social networks, privacy, trust, and Web infrastructure. Given the pressing need for developing Web analytics capability and capacity, 6 the Web Observatory will empower government, academia, and industries—large and small—with greater access to data, analytic tools, and visualizations. It will assist policy makers, legislative bodies, and other significant stakeholders to ensure safeguarding of privacy, societal values, and the future of the Web. Finally, it will facilitate the emergence of standards and tools for the harmonization of existing infrastructures that have been deployed. Therefore, the foundations of the Web Observatory are:

    • access to distributed repositories of data related to the use of the Web, open data, online social network data, and Web archives;

    • harmonized access to distributed repositories of visual-analytic tools to support a variety of quantitative and qualitative research methods that are interoperable with either published or private datasets;

    • shared methodologies for facilitating the harvesting of additional data sources and the development of novel analytic methods and visualization tools, to explore how the Web informs, shapes, and is shaped by human activity, to address societal challenges, and to promote innovation;

    • provision of a forum for discussion about an ethics framework on the archiving and processing of Web data and relevant policies; and

    • a data-licensing framework for archived data and the results of processing those data.

Setting up the Observatory with such seamless interaction and accessibility will increase its utility.
Building the Observatory
To be scalable and sustainable, the Web Observatory must be built as a distributed environment for collaborative knowledge sharing rather than a vast warehouse. Realizing this vision of a Web Observatory for Web Science requires a bottom-up approach involving a sequence of activity streams (see Figure 1 ). The first activity stream involves identifying existing repositories and archives that contain relevant data; these come from research laboratories and other global efforts such as open data repositories, e-Science infrastructures, the Web Foundation, and the Internet archive. This activity involves the publication of semantic catalogues to locate and describe existing datasets that are available for use. Identified datasets come from businesses and organizations, including university labs; those parties may wish to share their datasets or advertise them and only grant access to authorized parties. Provenance 7 will be essential to track the generation of data products and usage rights, and the Observatory has a keen eye to integrate emerging practice in topics such as automated policy handling, non-consumptive access, anonymization, privacy-preserving links, and differential privacy.




Figure 1. The National University of Singapore and Tsinghua University's NExT-Live Observatory. The Observatory provides online analysis and visualization of social, business, government, and research activity.



The second activity stream in building the Web Observatory involves the identification and sharing of tools to visualize, analyze, and harvest large distributed datasets. The goal of this activity is to make the capabilities offered by these tools easily accessible to the larger Web Science community. The added value of being able to use these tools on the larger data corpus as the Web Observatory grows further establishes its value to industry, government, and academia.
These two streams of activity are being coordinated by the Web Science Trust, a global not-for-profit organization that promotes Web Science and leverages Web Science research resources of the 15 University Labs affiliated with the Web Science Trust (WSTNet; see http://webscience.org/wstnet-laboratories/wstnet-home) from Brazil, China, South Korea, Europe, and the US. Current work includes the deployment of harvesters to collect data on the use of Web resources, schemas to describe datasets, deployment of data repositories based on existing platforms such as EPrints, and qualitative and quantitative methods to establish trends and influences across cultures ( http://thewebobservatory.org).
Beyond WSTNet, multiple efforts are underway in different parts of the world that provide online analysis and visualization of social, business, government, and research activity; one example is the NExT-Live Observatory by the National University of Singapore and Tsinghua University (see Figure 2 ). 8 The work within the Web Observatory is set to help establish the necessary momentum, standards, and infrastructure to enable a Web of observatories with the potential for global impact, which leads to the third activity stream. To this end, the Web Observatory is forging partnerships with the World Wide Web Consortium (W3C), the Open Data Institute (ODI) in the UK, Fraunhofer, the Web Foundation, and a growing list of industry collaborators. A W3C community group has been established ( www.w3.org/community/webobservatory) to foster discussion on the standardization that will be necessary to enable interoperability between available resources and on identifying the opportunities for industry and global government agencies to contribute large-scale systems, expertise, and datasets. This enables the Observatory to operate not only as a "lens" into human activity, but also as a decentralized, distributed infrastructure for sharing data and analysis: a Web of observatories that will be more than the sum of its parts, opening new ways for conducting research and promoting innovation.




Figure 2. The National University of Singapore and Tsinghua University's NExT-Live Observatory. The Observatory provides online analysis and visualization of social, business, government, and research activity.



Using a bottom-up approach to build the Web Observatory invites two sets of challenges in the computer science and intelligent systems arena. First, it necessitates the identification of open standards and protocols to promote interoperability for gathering and sharing data. With this effort under way, it will be possible to deploy new visual-analytic tools that will support mixed methods and interdisciplinary Web Science. Data analysis pipelines that can be automated stand to assist the scientist by mitigating the drudgery of managing the increasing volume of Web information flows. Hence, building the Web Observatory will necessitate effective research communication to support reproducible and reusable digital methods. 9 Second, building the analytic tooling in the Web Observatory brings a set of challenges in the areas of databases, provenance, and query languages for semi-structured data, record linking, ontologies and inference, computational algorithms, high-performance computing, computational workflows, machine learning, knowledge representation, policy reasoning, and systems architecture.
Building the Web Observatory has the potential for transformative societal impact. But the relevance of this effort to multiple stakeholders—academia, government, and industry—and their sustained engagement in a partnership, is key to the Web Observatory's success in helping address societal challenges. Benefits to industry and academia will encourage them to contribute additional data and tools, and thus promote network effects that will help make the Web Observatory a vibrant global resource. Engaging government will ensure that public sector information is made available in a structured and harmonized way, allowing governments to leverage industrial and academic activity at scale. A collateral benefit is that governments, industry, and academia will be able to use the Observatory to crowdsource analytic talent globally, and that deposited data stands to accumulate in value when it's utilized.
By undertaking the challenge of harmonizing data and analysis infrastructures and engaging in standardization, the Web Observatory is paving the way for further integration of structured information on the Web. Building on open data initiatives, the Observatory will provide the necessary tools for publishing structured information and its integration with public and private resources. The standardization effort, coupled with engagement with existing and emergent communities in the areas of data repositories, e-Science, and big data analytics, will provide a framework for the harmonization of e-Infrastructures that go beyond Web Science. As such, even though the Web Observatory is focused on data about the Web, its standardization efforts will support the development and harmonization of observatories about all data on the Web.

References

Thanassis Tiropanis is a senior lecturer with the Web and Internet Science Group at Electronics and Computer Science, University of Southampton, UK. His research interests include Web Science, online social networks, distributed linked data infrastructures, and linked data for higher education. Tiropanis has a PhD in computer science from University College London. Contact him at tt2@ecs.soton.ac.uk.
Wendy Hall is a professor of computer science at the University of Southampton; she also is the dean of the Faculty of Physical and Applied Sciences, and a director of the Web Science Trust. Her research interests include the development of Web technologies (particularly the Semantic Web), hypermedia systems and link services, advanced knowledge technologies, digital libraries, decentralized information systems, and human-computer interaction. Hall has a PhD in pure mathematics from the University of Southampton. She is a Dame Commander of the British Empire, a fellow of the Royal Society, and former president of the ACM. Contact her at wh@ecs.soton.ac.uk.
Nigel Shadbolt is a professor of AI at the University of Southampton and head of the Web and Internet Science Group. He's also a director of the Web Science Trust and of the Web Foundation, and chairman and co-founder of the Open Data Institute in the UK. His research interests include psychology, cognitive science, computational neuroscience, AI, the Semantic Web, and the emerging field of Web Science. Shadbolt has a PhD in artificial intelligence from the University of Edinburgh. He's the former Editor in Chief of IEEE Intelligent Systems and a fellow of the European AI Association. Contact him at nrs@ecs.soton.ac.uk.
David De Roure is a professor of e-research at the University of Oxford, director of the Oxford e-Research Centre, and the UK National Strategic Director for Digital Social Research. His research interest is in advancing digital scholarship through development of new digital methods with applicability in multiple disciplines. De Roure has a PhD in computer science from the University of Southampton. He's a fellow of the British Computer Society and a member of the Institute of Mathematics and its Applications. Contact him at david.deroure@oerc.ox.ac.uk.
Noshir Contractor is the Jane S. and William J. White Professor of Behavioral Sciences at Northwestern University. His research focuses on investigating factors that lead to the formation, maintenance, and dissolution of dynamically linked social and knowledge networks in a wide variety of contexts, including communities of practice in business, translational science and engineering communities, public health networks, and virtual worlds. Contractor has a PhD in communication from the University of Southern California. Contact him at nosh@northwestern.edu.
James Hendler is the Tetherless World Professor of Computer and Cognitive Science and head of the Computer Science Department at Rensselaer Polytechnic Institute. His research encompasses the Semantic Web, social media, and open government data systems. Hendler has a PhD in computer science from Brown University. He's the former Editor in Chief of IEEE Intelligent Systems and a fellow of IEEE, the American Association for Artificial Intelligence, and the British Computer Society. Contact him at hendler@cs.rpi.edu.
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