S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active Views for Electronic Commerce. In Proc. Intl. Conf. on Very Large Data Bases (VLDB), 1999.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....of the above query languages lack ECA rules. Web query languages, such as W3QL [13] view the Web as a single huge database and enable to address the structures and contents. XBML views a single Web source as a database and allows queries over Web based distributed databases. The active views [1] focuse on the comprehensive functionality of ECA rules. On the other hand, we have concluded the necessity of ECA rules from the experiences of applying XBML to concrete businesses. We extend the query optimization in relational databases[14] to the distributed context. ....

Abiteboul, S. et al.: Active Views for Electronic Commerce, Proc. Intl. Conf. VLDB 1999

....and swap operation. Finally, we develop a comprehensive algorithm that checks for the validity of XML views constructed by applying the four operations. 1 Introduction It is necessary to provide for XML views [1] Several systems have been proposed to support XML views, including Active Views [2] and MIX [5] While both systems provide for the definition of XML views, they do not validate the views that are created. Therefore, there is no guarantee that the views defined are valid. In this paper, we propose a systematic approach to ensure the validity of XML views. First, we transform ....

....rule for the operation. After that, the algorithm applies the normal rules for the operation. In this way, the view will be guaranteed to be valid once it is done. 4 Related Work Table 1. Comparison of ActiveViews system, MIX system and our approach Active Views MIX system Our approach system [2] [5] Data model XML XML DTD ORA SS View defini OQL styte tan XMAS tan XQuery tantion language guage guage guage Query tan Loret language XMAS tan XQuery lan guage guage guage Support pro No No Yes jection, join and swap operations Support view No No Yes validation Support No No ....

[Article contains additional citation context not shown here]

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In Int. Conf. on Very Large DataBases (VLDB), Edinburgh, Scotland, pages 138-149,1999.

....views can be defined on top of the default view. In addition, XQuery [17] is adopted to issue query on views of relational data in [15] Xyleme [10] defines an XML view by connecting one abstract DTD to a large collection of concrete DTDs with an extension of OQL as the query language. ActiveView [2] [3] defines views with active features, such as method calls and triggers, on ArdentSoftware s XML repository using a view specification language. In addition, XML views are also supported as a middleware in integration systems, such as MIX [4] YAT [9] and Agora [21] 2 All these systems ....

S. Abiteboul, S. Cluet, L. Mignet, et. al., "Active views for electronic commerce", VLDB, pp.138-149, 1999.

....We are currently investigating on event and reaction services [27] for the generation of adequate distributed active systems comprised of event listeners and rule managers that can be easily deployed on the network. The possible use of such components has been demonstrated [24] As shown in [1] such event listeners and rule managers are basic components to support electronic commerce applications. 12] also shows that business rules can be used for changing statically and dynamically views of Web sites. Such rules can be processed with event managers at the client level and rule ....

Serge Abiteboul, Bernd Amann, Sophie Cluet, Adi Eyal, Laurent Mignet, and Tova Milo. Active Views for Electronic Commerce. In Proceedings of 25th International Conference on Very Large Data Bases, Edinburgh, Scotland, UK, September 7-10 1999. Morgan Kaufmann.

....Distributed Active Systems (ODAS) comprised of independent event and rule managers. These systems can be used to support transparent integration, cooperation of distributed database and non database reactive components at a middleware level. For example to support electronic commerce applications [1], to manage business rules used for changing statically and dynamically views of Web sites [6] In such contexts, rules can be processed with event managers at the client level and rule managers at the Web server level. 1.2 Related Work Existing works for offering active functionalities as open ....

Serge Abiteboul, Bernd Amann, Sophie Cluet, Adi Eyal, Laurent Mignet, and Tova Milo. Active views for electronic commerce. In VLDB'99, Proceedings of 25th International Conference on Very Large Data Bases, September 7-10,

....and Database fields, the modelling of AHs requires to consider the different sources that affect the adaptation process. The approach that seems to be the most promising for modelling the Application domain is data centric, and many researches employ well known database modelling techniques [1]. The adaptation of the presentation to the User Model can be generally distinguished into adaptive presentation, i.e. a manipulation of information fragments, and adaptive navigation support, i.e. a manipulation of the links presented to the user [5] Due to the complexity of user models that ....

Abiteboul, S., Amann, B., Cluet, S., Eyal, A., Mignet, L., Milo, T., Active views for electronic commerce , in Proceedings of the 25 th VLDB Conference, 1999.

....DBMS made out of components would indeed be an actual component based solution of a database system. We motivate this further in the following section. 3.2.2 Component vs. monolithic DBMS Database systems are today used in various application areas, such as telecommunications [1] e commerce [37, 2], embedded systems [80] real time systems [44] etc. Expansion of database systems to new application domains unavoidably results in new requirements a database system must fulfill [29] Consider Internet applications where data is accessed from a variety of sources such as audio, video, text, ....

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In VLDB'99, Proceedings of 25th International Conference on Very Large Data Bases, pages 138--149, Edinburgh, Scotland, UK, September 1999. Morgan Kaufmann. ISBN 1-55860-615-7.

....on event and reaction services [60] for the generation of adequate distributed active systems comprised of event listeners and rule managers that can be easily deployed on the network [61] see Sections 3.1 and 3. 2) The possible use of such components has been demonstrated [50] As shown in [1] such event listeners and rule managers are basic components to support electronic commerce applications. 19] also shows that business rules can be used for changing statically and dynamically views of Web sites. Such rules can be processed with event managers at the client level and rule ....

Serge Abiteboul, Bernd Amann, Sophie Cluet, Adi Eyal, Laurent Mignet, and Tova Milo. Active Views for Electronic Commerce. In Proceedings of 25th International Conference on Very Large Data Bases, Edinburgh, Scotland, UK, September 7-10 1999. Morgan Kaufmann.

....of the Brazilian Government. comprised of independent event and rule managers. These systems can be used to support transparent integration, cooperation of distributed database and non database reactive components at a middleware level. For example to support electronic commerce applications [1], to manage business rules used for changing statically and dynamically views of Web sites [6] In such contexts, rules can be processed with event managers at the client level and rule managers at the Web server level. 1.2 Related Work Existing works for offering active functionalities as open ....

Serge Abiteboul, Bernd Amann, Sophie Cluet, Adi Eyal, Laurent Mignet, and Tova Milo. Active views for electronic commerce. In VLDB'99, Proceedings of 25th International Conference on Very Large Data Bases, September 7-10,

....present we covered mainly the first two dimensions and in particular, we formally defined, through the algebra, when a user interaction is necessary and can be automatically prompted. In order to allow more powerful and flexible presentations, a service could be provided with a kind of style sheet [1, 8]. Other directions for extensions are both on the logical and implementation side. For the logical side we are studying recursive services and additional operators for the presentation (such as the data cube) In particular, recursion has a strong theoretical impact on the model and on the ....

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. ############## ###### ## ################, Edinburgh, Scotland, pp. 138-149 (1999).

.... revenue in 2001, and busO4M4flj 54] flss andbusM4[flj 54] flss auctions are projected to become much larger markets Event condition action (ECA) rules are a s4] G]flj t computational paradigm deployed in a variety of ways in Web applications s pecifying and implementing Web bas buss fl proces]G [1, 3, 26, 70], encoding usg preferences in persO[flj 4GOMfl andpus technology [64, 26] encoding negotiation sotiation in Web bas[ negotiation [37] and change notification [58] ECArules have their origin in production sctions uch as OPS5 and have been much sflO44( in the context of modern daydatabas stabas ....

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In Proc. 25th Int. Conf. on Very Large Databases, pages 138--149, 1999.

....Such abilityisembedded within many WEB development products [23, 8] and applications [49, 3] whichsupport one to one information delivery in response to users current and past interactions. Active rules and database triggers are an important ingredient for supporting this reactive technology [1]. All of the above proposals, however, make use of mechanisms which operate locally, on top of given data sources which are controlled by the organizations delivering the information to users. So far, the possibilityofdistributing the pushing logic , and installing it at remote servers, has not ....

....of the rules. In the presentwork, XQuery [15] has been chosen to encode XML active rules. Other works deal with the de nition of triggers for XML data, more or less concerned with e commerce applications. A novel view speci cation language, equipped with active capabilities has been de ned in [1]. The actors involved in an electronic commerce application might need di erent views of the repository data, and these are encoded through a set of activity speci cations, methods and triggers. Enhanced mechanisms for noti cation, access control and logging tracing of user activities are ....

S. Abiteboul, C. Cluet, L. Mignet, B. Amann, T. Milo, and A. Eyal. \Active Views for Electronic Commerce". In 25th Very Large Data Bases Conference Proceedings, pages 138-149, September 1999.

....Model. The Application Domain Model is used to describe the hypermedia basic contents and their organisation to depict more abstract concepts. The most promising approach in modelling the Application domain is datacentric, and many recent researches employ well known database modelling techniques [1, 13]. The User Model attempts to describe the user s characteristics and preferences and his her expectations in the browsing of hypermedia. User Models (profiles) can be distinguished in overlay models, which describe a set of user s characteristics, typically represented by a set of attribute value ....

.... j, k) E The proposed probabilistic approach assumes that the weight W k (i,j) of the arc (i, j) in E k is the conditional probability P(j k,i) namely the probability that a user belonging to the profile k follows the link to the j node having already reached the i node: W k (i , j) E k [ 0, 1 ] W k (i, j) P(j k,i) i, j) E k , k=1, M P(i k,i) is considered to be always zero, as it is impossible a link from a node to itself. For each node i, the sum of the weights of outgoing arcs, for each profile, is always one. i N k # = k N k j i W 1 ) k=1, M. A ....

Abiteboul, S., Amann, B., Cluet, S., Eyal, A., Mignet, L., Milo, T., "Active views for electronic commerce", in Proceedings of the 25 th VLDB Conference, 1999.

....this new form of trade exist. In general, a distinction is made between business to business (b2b) and business to customer (b2c) E Commerce. While b2b focuses on component based integration of existing services into business processes of (virtual) enterprises (e.g. 2, 8] and data exchange [1], b2c E Commerce mainly addresses correctness issues w.r.t. the interactions of the various participants. In the b2c area, initial work by Doug Tygar provides a first and general overview of requirements of E Commerce from a customers perspective [4, 25, 26] mainly addressing atomic ....

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active Views for Electronic Commerce. In Proc. of the 25 th Int'l Conf. on Very Large Databases (VLDB'99), pages 138--149, Edinburgh, Scotland, Sept. 1999.

....strategy. However, due to the large number of (parametrized) Web pages the proposed optimization method cannot be easily adapted to our context. The space of possible materialization policies examined in [22] is also signi cantly more restricted then the one we would like to explore. Finally, in [1] the authors propose an interesting high level speci cation methodology for e commerce applications based on a rule based language. These systems complement our own; we believe that a complete solution for fast and high quality Web application deployment can only be obtained by an harmonious ....

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In Proc. of the Int. Conf. on Very Large Data Bases (VLDB), 1999.

....Science Dept. Univ. of Tel. Aviv 1 Overview The goal of this demonstration is to present the ma n features of (i) Axielle, an XML repository developed by Ardent Software [3] on top of the O= object oriented DBMS and (ii) the ActiveView system which has been built by the Verso project at INRIA [1] on top of Ax ielle. The demonstration is based on a simple electronic commerce application which will be described in Section 2. Electronic commerce is emerging as a major Web supported application. It involves handling and exchange of data (e.g. product catalogs, yellow pages, etc. and must ....

....propagated to the view although they can be propagated, if specified by the programmer. On the other hand, the view and the interface see the same data. 2. 3 Specification Language and Application Generator The above application can be specified in the high level ActiveView Language (AVL) [1] we have defined for describing electronic commerce applications. Acting as an application generator, the Active View system can then generate an actual application that captures the semantics of the above specification and allows the different users to work interactively on the specified data for ....

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In Int. Conf on Very Large DataBases (VLDB), Edinburgh, Scotland, September 1999.

....or impossible to support with the current web technologies. Notably: Version management and temporal queries in DOEM QL [11] style, allowing to follow the evolution of the XML documents, Work supported in part by R.N.R.T. Query subscriptions [7] a change monitoring service (such as [10, 1]) to notify end users about interesting events in the repository, A smart and user friendly search engine in an XML QL [13] or XQL [25] style, able to answer queries relying on the structure of the XML documents but also, to synthesize information coming from distinct documents [5] Semantic ....

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In Proc. Int. Conf. on Very Large Data Bases, 1999.

....or impossible to support with the current web technologies. Notably: ffl Version management and temporal queries in DOEM QL [11] style, allowing to follow the evolution of the XML documents, Work supported in part by R.N.R.T. 1 ffl Query subscriptions [7] a change monitoring service (such as [10, 1]) to notify end users about interesting events in the repository, ffl A smart and user friendly search engine in an XML QL [13] or XQL [25] style, able to answer queries relying on the structure of the XML documents but also, to synthesize information coming from distinct documents [5] ffl ....

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In Proc. Int. Conf. on Very Large Data Bases, 1999.

....Science Dept. Univ.ofTel.Aviv 1 Overview The goal of this demonstration is to present the main features of (i) Axielle, an XML repository developed by Ardent Software [3] on top of the O 2 object oriented DBMS and (ii) the ActiveView system which has been built by the Verso project at INRIA [1] on top of Axielle. The demonstration is based on a simple electronic commerce application which will be described in Section 2. Electronic commerce is emerging as a major Web supported application. It involves handling and exchange of data (e.g. product catalogs, yellow pages, etc. and must ....

....propagated to the view although they can be propagated, if specified by the programmer. On the other hand, the view and the interface see the same data. 2. 3 Specification Language and Application Generator The above application can be specified in the high level ActiveView Language (AVL) [1] we have defined for describing electronic commerce applications. Acting as an application generator, the Active View system can then generate an actual application that captures the semantics of the above specification and allows the di#erent users to work interactively on the specified data for ....

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In Int. Conf. on Very Large DataBases (VLDB), Edinburgh, Scotland, September 1999.

....implementation is discussed in Section 7. We conclude in Section 8 by considering related work. 2 Preliminaries Handling e commerce applications from different sources requires a common framework in which the various applications and their data can be presented and modeled. As demonstrated in [1], a typical e commerce application can be abstractly modeled by specifying the kinds of actors participating in the application and for each actor describing: i) the data available for the actor and its access rights (ii) the possible operations (methods) on the given data, iii) the various ....

....specification application flow specification . Actor actor kind n in application application name . Figure 1: Application specification The concrete syntax used for each part of the specification of global and local applications is given in the following sections. Readers familiar with [1] will notice that to some extent our AM syntax resembles that of [1] after all both systems are used for constructing e commerce applications. It is important to note however that the goal, hence semantics, here is completely different: In [1] specifications are used for constructing new ....

[Article contains additional citation context not shown here]

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, T. Milo, and L. Mignet. Active views for electronic commerce. In Int. Conf. on very Large DataBases (VLDB), Edinburgh, September 1999.

....to survey works of the author on the topic, the paper is clearly influenced by previous works at INRIA and Stanford. In particular, we will briefly discuss O 2 Views [27] a view mechanism for ODMG databases, Ozone [19] a system allowing to mix structured and semistructured data, and ActiveView [2], a view system for XML data with active features. In Section 2, we discuss views of XML data. We look at some existing relational database technologies for views in Section 3. Section 4 deals with views of object databases. Sections 5 and 6 deal, respectively, with semistructured and structured ....

....even more a database issue and database solutions become more compelling. Indeed, this explains why databases are used more and more in Web sites. The management of changes in an XML view environment is the topic of the present section. We have been working recently on a system called ActiveView [2]. The idea is to offer a declarative definition of Web views of some XML data with change control and active features. We illustrate this work next. ActiveView The following simple statement may be part of a definition of the customer view of an electronic catalog: let monitored catalog : ....

S. Abiteboul, B. Amann, S. Cluet, T. Milo, and V. Vianu. Active views for electronic commerce. In Conf'erence sur les Bases de Donn'ees, 1998. www-rocq.inria.fr/verso/ACTIVEVIEWS/paper/av.pdf.

....is a simple, portable, and human readable syntax for ordered trees [11] Adapted by the W3C from SGML [32] it provides a neutral format particularly convenient to exchange data. XML is expected to play a central role in the new generation of Web applications [10] ranging from electronic commerce [28, 2] and corporate portals [25] to digital libraries [9] Such applications need to manipulate large amounts of XML data coming from multiple sources. A typical digital library 1 can gather information from dozens of sources, including document management systems, relational databases and Web ....

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In Proceedings of International Conference on Very Large Databases (VLDB), Edinburgh, Scotland, Aug. 1999.

....Science Dept. Univ. of Tel. Aviv 1 Overview The goal of this demonstration is to present the main features of (i) Axielle, an XML repository developed by Ardent Software [3] on top of the O 2 object oriented DBMS and (ii) the ActiveView system which has been built by the Verso project at INRIA [1] on top of Axielle. The demonstration is based on a simple electronic commerce application which will be described in Section 2. Electronic commerce is emerging as a major Web supported application. It involves handling and exchange of data (e.g. product catalogs, yellow pages, etc. and must ....

....propagated to the view although they can be propagated, if speci ed by the programmer. On the other hand, the view and the interface see the same data. 2. 3 Speci cation Language and Application Generator The above application can be speci ed in the high level ActiveView Language (AVL) [1] we have de ned for describing electronic commerce applications. Acting as an application generator, the Active View system can then generate an actual application that captures the semantics of the above speci cation and allows the di erent users to work interactively on the speci ed data for ....

S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In Int. Conf. on Very Large DataBases (VLDB), Edinburgh, Scotland, September 1999.

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S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active Views for Electronic Commerce. In Proc. Intl. Conf. on Very Large Data Bases (VLDB), 1999.

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S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active Views for Electronic Commerce. In Proc. Intl. Conf. on Very Large Data Bases (VLDB), 1999.

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Abiteboul, S., B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo: 1999, `Active Views for Electronic Commerce'. In: Proc. Intl. Conf. on Very Large Data Bases (VLDB).

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S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active Views for Electronic Commerce. In Proc. Intl. Conf. on Very Large Data Bases (VLDB), 1999.

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S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In VLDB, pages 138--149, 1999.

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S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active Views for Electronic Commerce. In Proc. Intl. Conf. on Very Large Data Bases (VLDB), 1999.

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Abiteboul, S., B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo: 1999, `Active Views for Electronic Commerce'. In: Proc. Intl. Conf. on Very Large Data Bases (VLDB).

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S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active Views for Electronic Commerce. In Proc. Intl. Conf. on Very Large Data Bases (VLDB), 1999.

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S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active Views for Electronic Commerce. In Proc. Intl. Conf. on Very Large Data Bases (VLDB), 1999.

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Serge Abiteboul, Bernd Amann, Sophie Cluet, Adi Eyal, Laurent Mignet, Tova Milo, "Active Views for Electronic Commerce", Proc. of 25th Intl' Conf. on Very Large Data Bases (VLDB'99), Edinburgh (September 1999.

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ABITEBOUL, S.; CLUET, S.; MIGNET, L.; AMANN, B.; MILO, T.; EYAL, A., Active Views for Electronic Commerce, in: Proceedings of the 25th VLDB Conference, Edinburgh, Scotland, 1999, 138-149.

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Serge Abiteboul, Bernd Amann, Sophie Cluet, Adi Eyal, Laurent Mignet, Tova Milo, "Active Views for Electronic Commerce", Proc. of 25th Intl' Conf. on Very Large Data Bases (VLDB'99), Edinburgh (September 1999.

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S. Abiteboul, B. Amann, S. Cluet, E. Eyal, L. Mignet, and T. Milo. Active Views for Electronic Commerce. In Proc. VLDB'99, pages 138--149, 1999.

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Serge Abiteboul, Bernd Amann, Sophie Cluet, Adi Eyal, Laurent Mignet, and Tova Milo. Active views for electronic commerce. In VLDB'99, Proceedings of 25th International Conference on Very Large Data Bases, September 7-10, 1999.

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S. Abiteboul, B. Amann, S. Cluet, A. Eyal, L. Mignet, and T. Milo. Active views for electronic commerce. In Int. Conf. on Very Large DataBases (VLDB), Edinburgh, Scotland, pages 138-149, September 1999.

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