S. Ceri, P. Fraternali, S. Paraboschi and L. Tanca. Active rule management in Chimera. In Active Database Systems. (S. Ceri and J. Widom, eds) Morgan-Kau#man, 1995, 101-128.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....querying schemes to replace data retrieval aspects of SQL language. Although some have considered data definition aspects [3] or manipulation aspects, none have extensively considered the trigger aspects for SQL, especially from the user interface point of view. Other works (e.g. IF02 [16] IDEA [5]) have attempted to build graphical triggers description tools. Using IFO2, one can describe how different objects interact through events, thus giving priority to an overview of the system. Argonaut from the IDEA project [5] focused on the automatic generation of active rules that correct ....

....the user interface point of view. Other works (e.g. IF02 [16] IDEA [5] have attempted to build graphical triggers description tools. Using IFO2, one can describe how different objects interact through events, thus giving priority to an overview of the system. Argonaut from the IDEA project [5] focused on the automatic generation of active rules that correct integrity violations based on declaxative integrity constraint specifications, and active rules that incrementally maintain materialized views based on view definitions. TBE, on the other hand, helps users to directly design active ....

Ceri, S., Fraternali, P., Paraboschi, S., Tanca, L. "Active Rule Management in Chimera", In J. Widom and S. Ceri (ed.), Active Database Systems: Triggers and Rules for Active Database Processing, Morgan Kaufmann, 1996.

....Rgles Actives, lvnements primitifs et composites, Dtection d vnements. 1 Introduction In this paper, we are interested in events in active databases. Such databases are becoming popular and many research projects concern this area [12, 23, 17, 23, 29] also many prototypes have been developed [27, 30, 15, 22, 8, 2]. Event models and languages have received a lot of attention [18, 26, 16, 14, 5] Events are either considered as points in time [16, 14] or as happening of interest occurring at specific points in time [18] Events may be primitive (e.g. the update of Bobs salary) or composite, i.e. comprised ....

....3.1 Time and Events Time cannot be dissociated from events [5] The concept of time can be understood in several ways. We will not detail this concept and the way it is incorporated in databases as it is out of the scope of this paper. Readers may find more information on temporal databases in [20, 28, 2, 3]. The solution to represent a point in time is to define a reference moment and a unit (i.e. second, minute, hour, etc. We choose to use a discrete representation: the Gregorian calendar and we consider as in [5] a discrete time domain isomorphic to this calendar. Whatever the time ....

S. Ceri, P. Fraternali, S. Paraboschi, and L. Branca. Active Rule Management in Chimera. In [29], 1995.

....NAOS the elimination of events due to net effect composition results in the de triggering of rules, this is not true for Chimera. IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING, VOL. XX, NO. Y, MONTH 1999 4 HiPAC Ode Adam NAOS TriGS SAMOS Chimera Reference [10] 3] 14] 15] 16] 4] 17] [18] o o data model OODAPLEX new new O 2 GemStone new new messages messages messages messages messages messages messages primitive db ops db ops db ops db ops db ops events temporal temporal user def temporal migrations external user def event composition YES YES NO YES NO YES YES (1) ....

.... immediate user immediate immediate mode deferred deferred deferred (5) specified deferred deferred (5) decoupled decoupled (4) decoupled untargeted targeted untargeted targeted untargeted (6) untargeted both both both rules overriding NO YES (7) NO NO YES NO NO Legenda: 1) In [18] only disjunction of events is considered; an extension of Chimera with other kinds of event composition is described in [19] 2) The only parameter is the object receiver of the event (on which the rule is being executed) 3) Delta tables are used for referring to objects affected by ....

[Article contains additional citation context not shown here]

S. Ceri, P. Fraternali, S. Paraboschi, and L. Tanca, "Active Rule Management in Chimera," in Active Database Systems, S. Ceri and J. Widom, Eds. Morgan-Kaufmann, 1996.

.... events of insertion, deletion and update of tuples (see for example Oracle Triggers [25] Some research prototypes of active DBMS have been developed on the basis of Event Condition Action model (ECA) and active rules model [1, 12, 10] Some examples are HiPAC [9] Starburst [29] and Chimera [6]. Most of them support composite events [7] allowing internal ECA rules to be activated when two or more events occur. Our Synchroniser component performs a task that could be analogous to a composite event detection, but which is implemented outside the DBMS. This allows existing databases with ....

Ceri, S., Fratemali, P., Paraboschi, S., and Branca, L. (1996). Active Rule Management in Chimera. In Active Database Systems - Triggers and Rules For Advanced Database Processing, pages 151--176. Morgan Kaufmann.

....A RDL [SK96] is closely related to deductive databases: intensional relations are defined by means of deductive rules. Delta relations record the net effect of changes to edb relations during execution of a transaction. Active behavior is encoded via rules in an if then style. Chimera [CFPT96] distinguishes between declarative and procedural expressions: Declarative expressions are used in query primitives, integrity constraints, 5 and view declarations; transactions are specified using procedural expressions for actions and declarative expressions in conditions. 2.2 Production ....

S. Ceri, P. Fraternali, S. Paraboschi, and L. Tanca. Active Rule Management in Chimera. In Widom and Ceri [WC96a], chapter 6, pp. 151--176.

....as events and active rules in order to a) detect and record changes made to the database, and b) identify deductive rules that must be executed in response to these updates. The integration of active and deductive databases is an active research area. Some systems, like POSTGRES [23] and Chimera [9] support only backward chaining Prolog like deductive rules through data retrieval events. Most of the bottom up evaluation approaches [16, 24, 29] try to incorporate events into a deductive database. However, these approaches depart from relational deductive databases, where the notion of pure ....

S. Ceri, P. Fraternalli, S. Paraboschi and L. Tanca, Active rule management in Chimera, in Active Database Systems: Triggers and Rules for Advanced Database Processing, eds, J. Widom and S. Ceri, Morgan Kaufmann (1996) 151-176.

....extensible active OODB system, provided that it supports the complex event detection semantics and the rule management facilities of DEVICE. Unfortunately, to the best of our knowledge, only the EXACT system currently offers the suitable tools (meta classes [30] for extensibility. Chimera [6] supports extensibility by using low level active rules which can tailor the event consumption, parameter computation, rule coupling and execution schemes, but event occurrence parameters cannot persist beyond the end of the transaction, therefore Chimera cannot implement our method for production ....

Ceri, S, Fraternalli, P, Paraboschi, S and Tanca L, Active rule management in Chimera, in: Widom, J and Ceri, S, eds., Active Database Systems: Triggers and Rules for Advanced Database Processing, Morgan Kaufmann, 1996, 151-176.

.... database research has initially focussed on the integration of active behavior into relational DBMSs (Starburst [74] Ariel [48] POSTGRES [65] A second generation of projects (including Ode [38] Sentinel [17] and SAMOS, later followed by REACH [6, 7] ACOOD [4] NAOS [22] TriGS [50] Chimera [15], and [51] investigated object oriented ADBMS. Reactive behavior as offered by ADBMS can be beneficially used by numerous application areas, such as financial applications [20] network management [3] workflow management [42] medical applications [5] integrity constraints [12, 40] ....

S. Ceri., P. Fraternali, S. Paraboschi, L. Tanca. Active Rule Management in Chimera. In [75].

....implicit triggers into an event driven rule environment. The 3 RDL1 system [31] supports deductive rules in a production rule environment, while it provides active rule extensions (A RDL) for specifying and detecting events in the deductive rule language [40] Finally, POSTGRES [38] and Chimera [8] support backward chaining deductive rules through data retrieval events, while deductive rules have been integrated in Starburst [9] using a similar technique with [35] Ariel and Datex support data driven rules at the bottom level, that are efficiently matched using the special discrimination ....

....network describe combinations of events that have occurred in the database. Furthermore these tokens describe states of the database that have been reached somehow. Since database states are persistent tokens must persist too, beyond the end of the transaction. Contrary to all previous techniques [8, 11, 16, 20, 24] where event occurrences are preserved at most until the end of the transaction, because they are not required any more, in DEVICE event occurrences must be preserved. This feature is vital for the implementation of DEVICE on other complex event supporting systems. Notice that even the preserved ....

[Article contains additional citation context not shown here]

S. Ceri, P. Fraternalli, S. Paraboschi and L. Tanca, Active rule management in Chimera, in Active Database Systems: Triggers and Rules for Advanced Database Processing, eds, J. Widom and S. Ceri, Morgan Kaufmann (1996) 151-176.

....spatio temporal actions possibly related) in conjunction with the occurring interaction (in terms of events) and potentially with the validity of conditions constraints. We propose to model and represent Interactive Spatio Temporal (IST) configurations in terms of ECA rules. Active databases [7, 3] support active rules [3] also called triggers) Active rules react (through actions) to events, under given conditions. Temporal databases support the temporal properties of data, to allow a simple and powerful exploitation of them: they usually support tracks of the times when updates are ....

....possibly related) in conjunction with the occurring interaction (in terms of events) and potentially with the validity of conditions constraints. We propose to model and represent Interactive Spatio Temporal (IST) configurations in terms of ECA rules. Active databases [7, 3] support active rules [3] (also called triggers) Active rules react (through actions) to events, under given conditions. Temporal databases support the temporal properties of data, to allow a simple and powerful exploitation of them: they usually support tracks of the times when updates are performed, and valid times of ....

[Article contains additional citation context not shown here]

S. Ceri, P. Fraternali, S. Paraboschi, L. Tanca. "Active rule management in Chimera". In [12].

....(Year) John Wiley Sons, Inc. two independent research trends have emerged: on one hand the use of production rule languages (traditionally used in expert system shells) for expressing active computations, that is, manipulations of data to be executed automatically whenever certain events occur [5, 6, 7, 10, 13, 14, 15, 16, 17]; on the other hand the use of logic based rule languages for expressing, in a declarative way, complex database queries and deductive computations [1, 2, 3, 4, 11] From a practical point of view, the integration of these paradigms (active and deductive) into a unique homogeneous framework would ....

S. Ceri, P. Fraternali, S. Paraboschi and L. Tanca. Active rule management in Chimera. In Active Database Systems. (S. Ceri and J. Widom, eds) Morgan-Kauffman, 1995, 101128.

....concern the optimisation of checking: Nic79, HI85] for relational databases, BM86] for deductive databases, BD95] for object oriented databases, and [Law95] for deductive object oriented databases. In the context of active database systems, triggers are used to express integrity constraints [CW90, SKdM92, CFPT94, CCS94]. A trigger is composed by an event e, a condition c and an action a. If e occurs and if c is 24 satisfied then the action a is executed. Depending from the context, the language used for expressing actions is more or less powerful (in [CCS94] message passing, for example, is possible) ....

S. Ceri, P. Fraternali, S. Paraboschi, and L. Tanca. Active rule management in chimera. Morgan Kaufmann, 1994.

....rule set is con uence when any triggering of rules produce a unique nal database state independent to the order of execution of the rules. A rule set guarantees observable determinism when all visible actions performed by rules are the same for any order of execution of the rules. Chimera system [3] integrates an object oriented data model, a declarative query language, and an active rule language. It supports display, generalize, and specialize events in addition to traditional create, delete, and modify primitives to re ect object manipulation. Generally, the rule execution in active ....

S. Ceri, P. Fraternali, S. Paraboschi, and L. Branca. Active rule management in Chimera. In Active Database Systems - Triggers and Rules For Advanced Database Processing, pages 151-76. Morgan Kaufman, 1996.

....aspects of SQL language. Although some have considered data definition aspects (Collet and Brunel, 1992) or manipulation aspects, none have extensively considered the trigger aspects of SQL, especially from the user interface point of view. Other work (e.g. IFO 2 (Teisseire et al. 1994) IDEA (Ceri et al. 1996) have attempted to build graphical triggers description tools, too. Using IFO 2 , one can describe how different objects interact through events, thus giving priority to an overview of the system. Argonaut from the IDEA project (Ceri et al. 1996) focused on the automatic generation of active ....

....work (e.g. IFO 2 (Teisseire et al. 1994) IDEA (Ceri et al. 1996) have attempted to build graphical triggers description tools, too. Using IFO 2 , one can describe how different objects interact through events, thus giving priority to an overview of the system. Argonaut from the IDEA project (Ceri et al. 1996) focused on the automatic generation of active rules that correct integrity violation based on declarative integrity constraint specification and active rules that incrementally maintain materialized views based on view definition. TBE, on the other hand, tries to help users directly design active ....

Ceri, S., et al (1996) Active Rule Management in Chimera, In J. Widom and S. Ceri (ed.) Active Database Systems: Triggers and Rules for Active Database Processing , Morgan Kaufmann.

....to replace data retrieval aspects of the SQL language. Although some has considered data definition aspects [CB 92] or manipulation aspects, none has extensively considered the trigger aspects of the SQL, especially from the user interface point of view. Other works (e.g. IFO 2 [TPC 94] IDEA [CFPT 96] have attempted to build graphical triggers description tools, too. Using IFO 2 , one can describe how different objects interact through events, thus giving priority to an overview of the system. Argonaut from the IDEA project [CFPT 96] focused on the automatic generation of active rules that ....

....point of view. Other works (e.g. IFO 2 [TPC 94] IDEA [CFPT 96] have attempted to build graphical triggers description tools, too. Using IFO 2 , one can describe how different objects interact through events, thus giving priority to an overview of the system. Argonaut from the IDEA project [CFPT 96] focused on the automatic generation of active rules that correct integrity violation based on declarative integrity constraint specification and active rules that incrementally maintain materialized views based on view definition. TBE, on the other hand, tries to help users to directly design ....

S. Ceri, P. Fraternali, S. Paraboschi, L. Tanca, "Active Rule Management in Chimera", In J. Widom and S. Ceri (ed.), Active Database Systems: Triggers and Rules for Active Database Processing , Morgan Kaufmann, 1996.

....data retrieval aspects of SQL language. Although some have considered data definition aspects [3] or manipulation aspects, none have extensively TBE: Trigger By Example 3 considered the trigger aspects for SQL, especially from the user interface point of view. Other works (e.g. IFO 2 [16] IDEA [5]) have attempted to build graphical triggers description tools. Using IFO 2 , one can describe how different objects interact through events, thus giving priority to an overview of the system. Argonaut from the IDEA project [5] focused on the automatic generation of active rules that correct ....

....the user interface point of view. Other works (e.g. IFO 2 [16] IDEA [5] have attempted to build graphical triggers description tools. Using IFO 2 , one can describe how different objects interact through events, thus giving priority to an overview of the system. Argonaut from the IDEA project [5] focused on the automatic generation of active rules that correct integrity violations based on declarative integrity constraint specifications, and active rules that incrementally maintain materialized views based on view definitions. TBE, on the other hand, helps users to directly design active ....

[Article contains additional citation context not shown here]

Ceri, S., Fraternali, P., Paraboschi, S., Tanca, L. "Active Rule Management in Chimera", In J. Widom and S. Ceri (ed.), Active Database Systems: Triggers and Rules for Active Database Processing , Morgan Kaufmann, 1996.

.... or to enhance SQL with object oriented capabilities [14] A system, whose goal is specifically the integration of object oriented, deductive and active capabilities has been developed as part of the ESPRIT Project Idea [6, 7] In this work we shall describe the data model of Idea, called Chimera [9, 19, 8], and we shall give a semantics for it. We have chosen Chimera because it is a meaningful example of the integration of different paradigms, and, though not a commercial system, it is actually implemented. It seems important here to base the semantics of such languages on a general purpose logic ....

....can be successfully exploited to give a semantics for databases. For this purpose we will study the data model Chimera since it enjoys many interesting features of database languages as we will describe in the following section. 3 An overview of Chimera The data model of Idea, called Chimera [8, 9, 19], is an object oriented, deductive, active data model in that: it provides all concepts commonly ascribed to object oriented data models (such as object identity, complex objects and user defined operations, classes, inheritance) it provides capabilities for defining deductive rules (used to ....

S. Ceri, P. Fraternali, S. Paraboschi, and L. Tanca. Active rule management in Chimera. In J. Widom and S. Ceri, editors, Active Database Systems. Morgan Kaufmann, 1994.

....notation, twosided sequents nicely capture the evolution of state transitions and the proof construction corresponds to the operational computation. The paper presents a particular application of E hhf to the specification of a deductive object oriented database system called Chimera [10, 9, 23], which is an interesting example of integration among different programming paradigms. This is an interesting example to verify the power and the flexibility of the considered framework. In the next sections we shall describe the data model of Chimera [10, 9, 23] developed as part of the ESPRIT ....

....database system called Chimera [10, 9, 23] which is an interesting example of integration among different programming paradigms. This is an interesting example to verify the power and the flexibility of the considered framework. In the next sections we shall describe the data model of Chimera [10, 9, 23], developed as part of the ESPRIT Project Idea [8] and we shall give a logical semantics to it by defining an encoding in E hhf . Chimera has been chosen as a representative of modern database management systems (DBMS) These incorporate, for instance, objects modeling capabilities into deductive ....

[Article contains additional citation context not shown here]

S. Ceri, P. Fraternali, S. Paraboschi, and L. Tanca. Active rule management in Chimera. In J. Widom and S. Ceri, editors, Active Database Systems. Morgan Kaufmann, 1994.

....must be executed within transactions to assure database consistency and integrity. In the same way rules are executed within a transaction in order to process database operations. Many active database systems models or prototypes have been proposed [Da86, DBB 88, Han89, BBKZ92, CAM93, KRRV94, CFPT95, WC96, MFLS96, Pat] Database products and standard proposals (SQL 92, SQL3) include similar mechanisms. They share a common idea of providing the active functionality to databases but many design differences are found. Active systems may differ on active rule languages and data model ....

Ceri (S.), Fraternali (P.), Paraboschi (S.) et Tanca (L.). -- Active Rule Management in Chimera. In : Active Database Systems, ed. par Kaufmann (Morgan). -- San Mateo, CA, USA, S. Ceri and J. Widom, August 1995.

.... have been investigated ( CW90, CW91, BCMP94, CS94, CW94, CFPT94, WC96] As a consequence to these various uses of active rules, many active database systems models or prototypes have been proposed ( Da86, SHH87, DBB 88, AG89, Han89, WF90, BM91, DPG91, BBKZ92, SKM92, CAM93, CCS94, KRRV94, CFPT95a] Database products ( Ing92, Ora92, Syb92] and standards ( MM95] proposals include similar mechanisms. Active rule languages and integration of rules in various data models (relational, NF2, object oriented) have motivated numerous works. Events represent a research domain in themselves in ....

....reasons. To achieve this objective we propose the (core) Flexible Active Rule Execution (FL ARE) model that provides the basic concepts for describing the execution of rules. We also provide a formal description of this model. 1 A RDL [SKM92] Ariel [Han89] Beeri Milo [BM91] Chimera [CFPT95a] EXACT [DPG91] HiPAC [DBB 88] Informix, NAOS [CCS94, Col98] Ode [AG89] Oracle [Ora92] Postgres [SHH87] REACH [BBKZ92] SAMOS [Da86] Sentinel [CAM93] Starburst [WF90] TriGS [KRRV94] 2.2 The FL ARE Model FL ARE is not yet another rule execution model but might be considered as a ....

[Article contains additional citation context not shown here]

S. Ceri, P. Fraternali, S. Paraboschi, and L. Tanca, Active Rule Management in Chimera, Active Database Systems (San Mateo, CA, USA) (Morgan Kaufmann, ed.), S. Ceri and J. Widom, San Mateo, CA, USA, August 1995.

....are a promising approach for consistency maintenance in federated systems. Although the usage of the active object paradigm was already proposed in the context of the DOM project [2] existing prototypes of active OODBMS (e.g. REACH [4] SAMOS [12] ODE [13] NAOS [10] Sentinel [9] Chimera [7]) simply enhance homogeneous database systems with active mechanisms. Analyzing the limitations of existing active DBMSs [3, 25] it has to be explored to what extent active features can be applied in federated systems [21] Due to the coexistence of several data models and the local autonomy, ....

S. Ceri, P. Fraternali, S. Paraboschi, L. Branca; Active Rule Management in Chimera, in: J. Widom, S. Ceri (eds.): Active Database Systems: Triggers and Rules For Advanced Database Processing, Morgan Kaufmann, 1996.

No context found.

Ceri S., Fraternali P., Paraboschi S., Tanca L., "Active Rule Management in Chimera", in [25]

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Ceri S., Fraternali P., Paraboschi S., Tanca L., "Active Rule Management in Chimera", in [27]

No context found.

S. Ceri, P. Fraternali, S. Paraboschi and L. Tanca. Active rule management in Chimera. In Active Database Systems. (S. Ceri and J. Widom, eds) Morgan-Kau#man, 1995, 101-128.

No context found.

St. Ceri, P. Fraternali, St. Paraboschi, and L. Branca. Active rule management in chimera. In Active Database Systems - Triggers and Rules For Advanced Database Processing, chapter 6, pages 151-- 176. Morgan Kaufman Publishers Inc., 1996.

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