An object-oriented temporal model

Edelweiss, Nina; Oliveira, José Palazzo M. de; Pernici, Barbara

doi:10.1007/3-540-56777-1_21

Cited by 9 publications

(4 citation statements)

References 10 publications

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“…The workflow modeling method used in this paper is the TF-ORM (Temporal Functionality in Objects with Roles Method) [5,6] model, a temporal object-oriented data model [20]. TF-ORM has proved to be an efficient tool to model workflow, due to the following aspects: Using this model, a workflow is represented defining process, agent and resource classes, each one of them presenting their own static and dynamic properties.…”

Section: Workflow Modeling Using Tf-ormmentioning

confidence: 99%

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Workflow modeling: exception and failure handling representation

Edelweiss

Nicolao

Proceedings SCCC'98. 18th International Conference of the Chilean Society of Computer Science (Cat. No.98EX212)

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The representation of the activities that compose the workflow processes, their execution sequence and relationships, the agents responsible for their execution, and the resources that are used during execution, is known as Workflow Modeling. Several techniques are being proposed to model workflow. One of them is to express the workflow model using the temporal objectoriented data model TF-ORM [20]. The occurrence of failures and exceptions during workflow execution may cause serious problems, especially in mission-critical applications. This paper shows how the TF-ORM formalism, when used to model workflow, allows the representation of several exceptions and the definition of information to be used for the systems recovery.

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Section: Workflow Modeling Using Tf-ormmentioning

confidence: 99%

“…An alternative technique to model workflow was proposed in [20], using the temporal object-oriented model TF-ORM [5,6]. The behavior of the workflow processes is defined by classes, which are instantiated for each process execution.…”

Section: Introductionmentioning

confidence: 99%

Workflow modeling: exception and failure handling representation

Edelweiss

Nicolao

Proceedings SCCC'98. 18th International Conference of the Chilean Society of Computer Science (Cat. No.98EX212)

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“…Em [Faria et al, 1998] [Edelweiss et al, 1993, de Oliveira et al, 1995 utiliza o conceito de papéis para representação dos comportamentos dos objetos [Edelweiss, 1998], e suporta tanto o tempo de transação como de validade. Outros trabalhos também voltado para modelos orientados a objetos podem ser encontrados em [Rose & Segev, 1991] [Elmasri et al, 1993] [Bertino et al, 1996] [Fauvet et al, 1997].…”

Section: Considerações Iniciaisunclassified

Tratamento de tempo e dinamicidade em dados representados em espaços métricos

Bueno¹

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Nowadays, the Database Management Systems (DBMS) must be able to manage complex data, such as multimedia data, genetic sequences, temporal series, besides the traditional data. For queries on large collections of complex data, the similarity among elements is the most relevant concept, and it can be adequately expressed when data are represented in metric spaces. Regardless of the data domain, there are applications that must tracking the evolution of data over time However, the existing Metric Access Methods assume that the data elements are immutable. Aiming at both treating time and allowing changes in metric data, the work presented in this thesis consisted of two main parts. The first part addresses the inclusion of the operations for element remotion and updating in metric access methods. These operations are meant to application domains that work with metric data that changes over time, regardless of the needed to manage temporal information. A new method for metric trees optimization was also developed in this part of the work. It was based on the proposed remotion algorithm. The second part of the thesis addresses including the temporal evolution concept in data represented in metric spaces. The Metric-Temporal Space was proposed, a representation model to allow comparing elements consisting of metric data with temporal information associated. The model includes a method to identify the relative contributions of the temporal and the metric components in the final similarity calculation. Strategies for trajectory analysis of metric data over time was also presented, through the immersion of metric-temporal spaced in dimensional spaces. Finally, a new method for weighting multiple image descriptors was presented. It was derived from changes in the proposed method to identify the contributions of the components of the metric-temporal space.

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“…This paper presents a Temporal Database Environment using the TF-ORM data model (Temporal Functionality in Objects with Roles) [6]. The environment is based on the presented approach, and includes the following features:…”

Section: Introductionmentioning

confidence: 99%

A temporal database management system implemented on top of a conventional database

Edelweiss

Hübler²,

Moro³

et al.

Proceedings 20th International Conference of the Chilean Computer Science Society

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Temporal data models have proven to be convenient to specify applications, allowing the representation of the temporal evolution of data. Several temporal data models were proposed in the last 20 years with this purpose, but no commercial implementation of a Temporal Database is still available. This paper presents an Integrated Temporal Database Environment implemented on top of a conventional database. Using this environment, a user can handle the specification, the data definition and the queries as thought the database implements the temporal data model. The environment performs the mapping from the temporal conceptual schema to the correspondent database, and of the queries expressed in the temporal query language to SQL. Data definition is controlled based on the state transition rules of the temporal data model, keeping thus the temporal integrity of the database. The underlying conventional database keeps transparent to the user. * This work was partially supported by CNPq -Brazil 0-7695-0810-3/00 $10.00 0 2000 IEEE

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An object-oriented temporal model

Cited by 9 publications

References 10 publications

Workflow modeling: exception and failure handling representation

Workflow modeling: exception and failure handling representation

Tratamento de tempo e dinamicidade em dados representados em espaços métricos

A temporal database management system implemented on top of a conventional database

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