T. Risch and V. Josifovski. Distributed data integration by object-oriented mediator servers. Concurrency and Computation: Practice and Experience, 13(11):933--953, 2001.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....hasRules hasQueryLiterals arg1 arg2 object subject predicate hasHead Fig. 2 Edutella Common Data Model (ECDM) using a simple mapping service to translate from RDF QEL queries (subset of conjunctive queries) to Xpath queries over the appropriate XML LOM schema, AMOS II based peers [28] with local repositories, KAON based peers [22] allowing remote annotation [14] using an RDF based ontology format, and an O TelosPeer [17] and [34] The environment also supports the design and integration of other tools which make use of RDF metadata. The Ont O Mat editor and annotation tool ....

T. Risch and V. Josifovski. Distributed data integration by object-oriented mediator servers. Concurrency and Computation: Practice and Experience, 13(11):933 -- 953, 2001.

.... of IMS LOM RDF metadata stored in a relational database, a DbXML based peer [Qu and Nejdl, 2001] as a prototype for an XML repository using a simple mapping service to translate from RDF QEL 1 queries (conjunctive queries) to Xpath queries over the appropriate XML LOM schema, AMOS II based peers [Risch and Josifovski, 2001] with local repositories, KAON based peers [Maedche et al. 2002] allowing remote annotation [Handschuh et al. 2001] using an RDF based ontology format, and an O Telos Peer [Jarke et al. 1995] and [Wolpers et al. 2002] which we describe in section 3. The environment also supports the design ....

Risch, T. and Josifovski, V. (2001). Distributed data integration by object-oriented mediator servers. Concurrency and Computation: Practice and Experience, 13(11):933 953.

....Repository) 3] based peers using a subset of IMS LOM metadata; 2. DbXML based peers [14] as a prototype for an XML repository using a simple mapping service to translate from RDFQEL 1 queries (conjunctive queries) to Xpath queries over the appropriate XML LOM schema; 3. AMOS II based peers [15] with local repositories; 4. KAON based peers [9] allowing remote annotation [6] using an RDF based ontology format; 5. Concept Base, a repository with full datalog capabilities [7] Moreover the resulting environment will allow the design and integration of other tools which make use of ....

T. Risch and V. Josifovski. Distributed data integration by object-oriented mediator servers. Concurrency and Computation: Practice and Experience, 13(11):933 -- 953, 2001.

....object oriented data model and query language, extensibility, and distribution and autonomy of the peers. 3 Composable Mediators Architecture Application Application , Fig. 1. Logical compositions of mediators To implement composable mediators we use the P2P mediator system AMOS II [17]. To achieve modularity and distribution each mediator is an autonomous object relational DBMS with its own query processor, storage and catalog. Knowledge sharing and reuse is based on the capability of the mediator peers to use transparently OO views [18, 19] types and functions from remote ....

Risch, T., Josifovski, V.: Distributed data integration by object-oriented mediator servers. Concurrency and Computation: Practice and Experience 13 (2001) 933- 953

....enhance the state of the art in the areas of database and data integration techniques. It will produce reports and scientific publications. The work will extend on research developed at Uppsala Database Laboratory (http: www.dis.uu. se udbl) on OO queries over distributed and heterogeneous data [41, 42, 32]. Research from other institutes on wrapping and searching heterogeneous, distributed, and semistructured data, e.g. 15, 23, 40] is also applicable. Other important supplemental components are user interface modules for subject oriented visual query specifications and for visualizing retrieved ....

T. Risch and V. Josifovski. Distributed data integration by object-oriented mediator servers. In Concurrency - Practice and Experience J. John Wiley & Sons, 2001. http://www.dis.uu.se/ udbl/publ/concur00.pdf, to be published.

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T. Risch and V. Josifovski. Distributed data integration by object-oriented mediator servers. Concurrency and Computation: Practice and Experience, 13(11):933--953, 2001.

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T. Risch, V. Josifovski. Distributed Data Integration by Object-Oriented Mediator Servers. Concurrency and Computation: Practice and Experience J., 13(11), John Wiley & Sons, September, 2001.

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T. Risch and V. Josifovski. Distributed data integration by object-oriented mediator servers. Concurrency and Computation: Practice and Experience, 13(11):933--953, 2001.

....queries return exactly the tuples which we mention in the query, while XPath queries in dbXML by default return the whole sub document located below the element selected by the XPath expression, but might also identify the whole document matching this expression. 5. 5 AmosQL and Mediators Amos II [33] is a distributed mediator engine where views of data from several different data sources can be defined. The views are defined using the object relational query language AmosQL. AmosQL is relationally complete. It is relatively simple to translate RDF and RDF Schema metadata descriptions to ....

.... to properties in RDF, derived functions that represent views and correspond to rules in Datalog, and foreign functions that implement algorithms external to the query language (e.g. in Java) When wrapping external data sources with Amos II the multi directional foreign function facility [33] provides the primitive to specify access paths and capabilities of the sources. The general syntax for AmosQL queries is: select result from domain specifications where condition Each domain specification associates a query variable with a type where the variable is universally ....

[Article contains additional citation context not shown here]

T. Risch and V. Josifovski. Distributed data integration by object-oriented mediator servers. Concurrency and Computation: Practice and Experience, 13(11):933 -- 953, 2001.

....queries return exactly the tuples which we mention in the query, while XPath queries in dbXML by default return the whole sub document located below the element selected by the XPath expression, but might also identify the whole document matching this expression. 5. 5 AmosQL and Mediators Amos II [31] is a distributed mediator engine where views of data from several different data sources can be defined. The views are defined using the object relational query language AmosQL. AmosQL is relationally complete. It is relatively simple to translate RDF and RDF Schema metadata descriptions to ....

....correspond to properties in RDF, derived functions that represent views and correspond to rules in Datalog, and foreign functions that implement algorithms external to the query language (e. g in Java) When wrapping external data sources with Amos II the multi directional foreign function facility [31] provides the primitive to specify access paths and capabilities of the sources. The general syntax for AmosQL queries is: select result from domain specifications where condition Each domain specification associates a query variable with a type where the variable is universally ....

[Article contains additional citation context not shown here]

T. Risch and V. Josifovski. Distributed data integration by object-oriented mediator servers. Concurrency and Computation: Practice and Experience, 13(11):933 -- 953, 2001.

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