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 Chen Chang

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Average citations per article17.42
Citation Count209
Publication count12
Publication years1997-1999
Available for download7
Average downloads per article937.43
Downloads (cumulative)6,562
Downloads (12 Months)44
Downloads (6 Weeks)6
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12 results found Export Results: bibtexendnoteacmrefcsv

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1 published by ACM
June 1999 ACM SIGMOD Record: Volume 28 Issue 2, June 1999
Publisher: ACM
Bibliometrics:
Citation Count: 36
Downloads (6 Weeks): 0,   Downloads (12 Months): 7,   Downloads (Overall): 553

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In this paper we present a mechanism for translating constraint queries , i.e. , Boolean expressions of constraints, across heterogeneous information sources. Integrating such systems is difficult in part because they use a wide range of constraints as the vocabulary for formulating queries. We describe algorithms that apply user-provided mapping ...
Also published in:
June 1999  SIGMOD '99: Proceedings of the 1999 ACM SIGMOD international conference on Management of data

2
February 1999 Computer: Volume 32 Issue 2, February 1999
Publisher: IEEE Computer Society Press
Bibliometrics:
Citation Count: 9

For digital libraries to thrive, the providers of information and information processing services must be able to evolve their systems autonomously. However, as the complexity of their offerings increases, software tools more sophisticated than existing Web facilities are needed. Distributed object technology may be the answer. The availability of high-volume, ...

3 published by ACM
January 1999 ACM Transactions on Information Systems (TOIS): Volume 17 Issue 1, Jan. 1999
Publisher: ACM
Bibliometrics:
Citation Count: 18
Downloads (6 Weeks): 1,   Downloads (12 Months): 5,   Downloads (Overall): 1,907

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Searching over heterogeneous information sources is difficult in part because of the nonuniform query languages. Our approach is to allow users to compose Boolean queries in one rich front-end language. For each user query and target source, we transform the user query into a subsuming query that can be supported ...
Keywords: Boolean queries, filtering, predicate rewriting, query subsumption, query translation, content-based retrieval

4
July 1998
Bibliometrics:
Citation Count: 2

In this paper we present a mechanism for translating information in heterogeneous digital library environments. We model information as a set of conjunctive constraints that are satisfied by real- world objects (e.g, documents, their metadata). Through application of semantic rules and value transformation functions, constraints are mapped into ones understood ...

5 published by ACM
May 1998 DL '98: Proceedings of the third ACM conference on Digital libraries
Publisher: ACM
Bibliometrics:
Citation Count: 8
Downloads (6 Weeks): 0,   Downloads (12 Months): 2,   Downloads (Overall): 328

Full text available: PDFPDF

6
May 1998
Bibliometrics:
Citation Count: 0

Discusses the history and current directions of interoperability in different parts of computing systems relevant to Digital Libraries

7
May 1998
Bibliometrics:
Citation Count: 0

We describe an extensible constructor tool that helps information experts (e.g., librarians) create specialized query synthesizers for heterogeneous digital-library environments. A query synthesizer provides a graphical user interface in which a digital-library patron can specify a high-level, fielded, multi-source query. Furthermore, a query synthesizer interacts with a query translator and ...

8
May 1998
Bibliometrics:
Citation Count: 4

Searching over heterogeneous information sources is difficult in part because of the non- uniform query languages. Our approach is to allow users to compose Boolean queries in one rich front-end language. For each user query and target source, we transform the user query into a subsuming query that can be ...

9 published by ACM
April 1998 Communications of the ACM: Volume 41 Issue 4, April 1998
Publisher: ACM
Bibliometrics:
Citation Count: 32
Downloads (6 Weeks): 4,   Downloads (12 Months): 12,   Downloads (Overall): 1,761

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10 published by ACM
July 1997 DL '97: Proceedings of the second ACM international conference on Digital libraries
Publisher: ACM
Bibliometrics:
Citation Count: 5
Downloads (6 Weeks): 0,   Downloads (12 Months): 2,   Downloads (Overall): 96

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11 published by ACM
July 1997 DL '97: Proceedings of the second ACM international conference on Digital libraries
Publisher: ACM
Bibliometrics:
Citation Count: 17
Downloads (6 Weeks): 1,   Downloads (12 Months): 9,   Downloads (Overall): 1,277

Full text available: PDFPDF
Keywords: attrabute model translation, heterogeneity, interoperability, metadata architecture, metadata repository, InfoBus, digital libraries, CORBA, attribute model translation, proxy architecture

12 published by ACM
June 1997 SIGMOD '97: Proceedings of the 1997 ACM SIGMOD international conference on Management of data
Publisher: ACM
Bibliometrics:
Citation Count: 78
Downloads (6 Weeks): 0,   Downloads (12 Months): 7,   Downloads (Overall): 640

Full text available: PDFPDF
Document sources are available everywhere, both within the internal networks of organizations and on the Internet. Even individual organizations use search engines from different vendors to index their internal document collections. These search engines are typically incompatible in that they support different query models and interfaces, they do not return ...
Also published in:
June 1997  ACM SIGMOD Record: Volume 26 Issue 2, June 1997



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