|
|
|
Library |
Publications
|
|
Publications by Year
|
Title
|
Metadata for Digital Media
|
|
Authors
|
W. Klas, and A. Sheth, Eds.
|
|
Citation
|
Special Issue of SIGMOD Record
|
|
Publication Date
|
December 1994
|
|
Keywords
|
metadata, digital media
|
|
Projects
|
Other
|
|
Download
|
PS
PDF
|
|
Publication Type |
Article
|
|
Abstract
|
|
|
|
Title
|
Semantic Based Information Brokering
|
|
Authors
|
V. Kashyap, and A. Sheth
|
|
Citation
|
Proceedings of the 3rd International Conference on Information and Knowledge Systems
|
|
Publication Date
|
November 1994
|
|
Keywords
|
information brokering, semantics, metadata
|
|
Projects
|
IQ, SI
|
|
Download
|
PS
PDF
|
|
Publication Type |
Conference
|
|
Abstract
|
The rapid advances in computer and communication technologies, and their merger, is leading to a global informationm market place. It will consist of federations of very large number of information systems that will cooperate to varying extents to support the users' information needs. We discuss an approach to information brokering in the above environment. We discuss two of it's tasks: information resource discovery, which identifies relevant information sources for a given query, and query processing, which involves the generation of appropriate mapping from relevant but structurally heterogeneous objects. Query processing consists of information focusing and information correlation.
|
|
|
Title
|
The InfoHarness Information Integration Platform
|
|
Authors
|
L. Shklar, S. Thatte, H. Marcus, and A. Sheth
|
|
Citation
|
|
|
Publication Date
|
October 1994
|
|
Keywords
|
metadata
|
|
Projects
|
IH
|
|
Download
|
PS
|
|
Publication Type |
Conference
|
|
Abstract
|
|
|
|
Title
|
Q-Data: using deductive database technology to improve data quality
|
|
Authors
|
A. Sheth, C. Wood, and V. Kashyap
|
|
Citation
|
Applications of Deductive Databases, R. Ramakrishnan, Ed., Kluwer Academic Press.
|
|
Publication Date
|
June 1994
|
|
Keywords
|
data consistency, data quality, rule based systems
|
|
Projects
|
Other
|
|
Download
|
PS
PDF
|
|
Publication Type |
Book Chapter
|
|
Abstract
|
This chapter discusses an extended deductive database prototype system, Q-Data, developed by Bellcore to improve data quality through data validation and cleanup. The key technology component of Q-Data is the extended deductive database system LDL++, developed at MCC. We discuss the issues of data quality improvement, the relevance of the deductive database technology such as the LDL++ system to data quality improvement tasks, and the system architecture of the prototype. Furthermore, we describe our experiences using the deductive database technology in an ongoing Q-Data trial attacking a real-world problem with test data from operational systems. Experiences related to engineering aspects of both the deductive database system and other component technologies, as well as pragmatic aspects of the implementation of Q-Data as a distributed system, are discussed.
|
|
|
Title
|
Specifying Multi-system Workflow Applications in METEOR
|
|
Authors
|
N. Krishnakumar, and A. Sheth
|
|
Citation
|
Bellcore Technical Memorandum TM-24198
|
|
Publication Date
|
May 1994
|
|
Keywords
|
workflow, workflow modeling, intertask dependency, METEOR
|
|
Projects
|
M
|
|
Download
|
PS
PDF
|
|
Publication Type |
Technical Report
|
|
Abstract
|
Many enterprise applications require performing different tasks on different systems (or processing entities). Both the types of tasks and processing entities can be very heterogeneous. Such enterprise applications can be supported by workflow automation. In this paper, we discuss specification of workflows that involve heterogeneous tasks that execute on old mainframe based (legacy) application systems as well as new workstation-based distributed computing systems.
|
|
|
Title
|
Semantics-based Information Brokering: A step towards realizing Infocosm
|
|
Authors
|
V. Kashyap, and A. Sheth
|
|
Citation
|
Technical report DCS-TR-307, Dept. of Computer Science, Rutgers University
|
|
Publication Date
|
March 1994
|
|
Keywords
|
information brokering, metadata, Infocosm, semantics
|
|
Projects
|
IQ, SI
|
|
Download
|
PS
PDF
|
|
Publication Type |
Technical Report
|
|
Abstract
|
The rapid advances in computer and communication technologies, and their merger, is leading to a global information market place. It will consist of federations of very large number of information systems that will cooperate to varying extents to support the users' information needs. We propose an architecture which may facilitate meeting these needs. It consists of three main components, information providers, information brokers and information consumers. We also propose an approach to information brokering. We discuss two of it's tasks: information resource discovery, which identifies relevant information sources for a given query, and query processing, which involves the generation of appropriate mapping from relevant but structurally heterogeneous objects. Query processing consists of information focusing and information correlation.
|
|
|
Title
|
Specification and Execution of Transactional Workflows
|
|
Authors
|
M. Rusinkiewicz, and A. Sheth
|
|
Citation
|
Modern Database Systems: The Object Model, Interoperability, and Beyond, W. Kim, Ed., Addison-Wesley
|
|
Publication Date
|
1994
|
|
Keywords
|
workflow, transactional workflow, scheduling, recovery
|
|
Projects
|
M
|
|
Download
|
PS
PDF
|
|
Publication Type |
Book Chapter
|
|
Abstract
|
The basic transaction model has evolved over time to incorporate more complex transaction structures and to selectively modify the atomicity and isolation properties. In this chapter we discuss the application of transaction concepts to activities that involve coordinated execution of multiple tasks (possibly of different types) over different processing entities. Such applications are referred to as transactional workflows. In this chapter we discuss the specification of such workflows and the issues involved in their execution.
|
|
|
Title
|
Using Tickets to Enforce the Serializibility of Multidatabase Transactions
|
|
Authors
|
D. Georgakopoulos, M. Rusinkiewicz, and A. Sheth
|
|
Citation
|
IEEE Transactions on Knowledge and Data Engineering, 6 (1), pp. 166-180
|
|
Publication Date
|
February 1994
|
|
Keywords
|
serializability, multidatabase transactions, consistency, distributed databases, transaction processing, global serializability, local database system, analogous execution, serialization orders, forced local conflicts, local cascadelessness, global scheduler, local strictness
|
|
Projects
|
Other
|
|
Download
|
PS
PDF
|
|
Publication Type |
Journal
|
|
Abstract
|
To enforce global serializability in a multidatabase environment the multidatabase transaction manager must take into account the indirect (transitive) conflicts between multidatabase transactions caused by local transactions. Such conflicts are difficult to resolve because the behavior or even the existence of local transactions is not known to the multidatabase system. To overcome these difficulties, we propose to incorporate additional data manipulation operations in the subtransactions of each multidatabase transaction. We show that if these operations create direct conflicts between subtransactions at each participating local database system, indirect conflicts can be resolved even if the multidatabase system is not aware of their existence. Based on this approach, we introduce optimistic and conservative multidatabase transaction management methods that require the local database systems to ensure only local serializability. The proposed methods do not violate the autonomy of the local database systems and guarantee global serializability by preventing multidatabase transactions from being serialized in different ways at the participating database systems. Refinements of these methods are also proposed for multidatabase environments where the participating database systems allow schedules that are cascadeless or transactions have analogous execution and serialization orders. In particular, we show that forced local conflicts can be eliminated in rigorous local systems, local cascadelessness simplifies the design of a global scheduler, and that local strictness offers no significant advantages over cascadelessness.
|
|
|
Title
|
BERDI: A Practical Toolkit for Schema Design, Analysis and Integration
|
|
Authors
|
A. Sheth, and H. Marcus
|
|
Citation
|
Bellcore Technical Memorandum TM-STS-019981/2, (issue 2)
|
|
Publication Date
|
March 1994
|
|
Keywords
|
schema integration, schema analysis, schema design, schema management tool
|
|
Projects
|
SI
|
|
Download
|
PS
PDF
PDF
|
|
Publication Type |
Technical Report
|
|
Abstract
|
We have developed a software prototype toolkit called Bellcore Schema Design and Integration (BERDI). Its goal is to support a pragmatic, flexible, faster, and accurate process of designing new schemas (including data model integrity constraints and extensive dictionary information) as well as managing multiple schemas. Emphasis of BERDI so far has been on the analysis, interdependency specification, and integration issues related to managing multiple schemas. In this paper, we discuss BERDI, including some aspects of the methodology and techniques it uses with emphasis on the pragmatic aspects and the industrial practice.
|
|
|
Title
|
Transactional workflows: research, enabling technologies and applications
|
|
Authors
|
A. Sheth
|
|
Citation
|
Proceedings.10th International Conference on Data Engineering, 1994. pp.:403
|
|
Publication Date
|
March 1994
|
|
Keywords
|
information brokering, metadata, Infocosm, semantics
|
|
Projects
|
Other
|
|
Download
|
|
|
Publication Type |
Conference
|
|
Abstract
|
Abstract only given, as follows. Need to increase productivity and reduce cost have lead to reengineering and automation of operations across corporations. Some of the applications involve imaging, document processing and routing. These tasks can be effectively automated using current genre of workflow automation products. Some other applications involve tasks that can be modeled in client-server style using traditional transactions. These can be supported by distributed transaction processing/monitoring systems. Finally, there is an important class of more complicated applications that involve heterogeneous but automated tasks, with varying levels of transaction properties, and performed at heterogeneous systems. We look at three aspects of the emerging technology of transactional workflow management that aims to support such applications: Identify properties of a class of multi-system applications and the environments that can be supported by transactional workflow systems: Discuss how a transactional workflow management system is different from, but "builds upon" the current transaction processing and workflow automation technologies: Discuss some of the relevant database research as well as software system and application prototyping experiences, especially those related to the extended/relaxed transaction models. Much of the discussion is based on our study of some real (mostly telecommunications) applications, and research and prototyping done at Bellcore in collaboration with U. of Houston and MCC's Carnot project.
|
|
|
|
