4.
Causalidade e Dependência em Raciocínio Sobre Ações - Varzinczak, Ivan J.
In this work we propose a solution to the frame and ramification problems in terms of a dependence relation that points out the circumstances in which a certain action may change the truth value of a given literal. Such relation can be viewed as a weak causal notion, which is considered fundamental for correctly reasoning about actions. Once integrated in the base formalism of the Logic of Actions and Plans LAP, it gives us a simple and powerful causal approach to deal with problems involving actions. In this text we make a systematic comparison among other recent formalisms with the...
6.
Mapeamento de Atributos Complexos e Multivalorados na Extração de Esquemas Utilizando XML - Pinto, Jose S. P.
This work describes a way to map complex and / or multivalued attributes from a visual query environment to relational databases, using XML. These attributes are usually produced after the application of integration methodologies, like ERC+, whenever exists in original databases. The mapping was produced in databases already integrated, using XML DTD files to retain knowledge about pre-integration databases, and a tool, called VIQUEN, that generates a schema visualization by use the ERC+ model. Queries and their results are both expressed in a visual environment. Express queries in a visual environment enables common users to create your own queries, since...
7.
Provedores de Dados de Baixo Custo: Publicação Digital ao Alcance de Todos - Garcia, Patricia A. B.
The availability of information by the electronic media has been improving the visibility of scientific researches, which was restricted to traditional periodicals. Research centers and academic databases, and more recently, digital libraries and e-prints archives have been contributed to a new scenery that offers fast and free access to scientific information. Now, several initiatives encourages the creation of open archives and digital libraries. The Open Archives Initiative (OAI) promotes the communication standardization between archives through OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting), improving the interoperability among themselves. There are software available at OAI which purpose is to facilitate the...
8.
Uso de XML para Interoperabilidade entre Bases Heterogêneas - Pasqual, Juliana P.
The coexistence of heterogeneous databases, implemented using different data models, with diversity of language, representation and hardware platforms, become natural to use the technology of database integration for sharing information. With the purpose to provide interoperability between the integrated database and the local databases that compose it, preserving the autonomy of local databases, this work presents a solution based on XML. The result of this work is a decomposition of a SQL expression, introduced to integrate schema, into SQL expressions correspondents to each local schema. The solution presented proposes: 1) the mapping of integrated schema in relation of its components...
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