In this paper we address the important issue of establishing a formal background for the management of semi-structured data. We define a data model and propose an algebra for XML. The algebra, clearly inspired by relational algebra, is quite intuitive; nevertheless it is able to represent most of XQuery expressions
{"title":"A Data Model and an Algebra for Querying XML Documents","authors":"G. Buratti, D. Montesi","doi":"10.1109/DEXA.2006.6","DOIUrl":"https://doi.org/10.1109/DEXA.2006.6","url":null,"abstract":"In this paper we address the important issue of establishing a formal background for the management of semi-structured data. We define a data model and propose an algebra for XML. The algebra, clearly inspired by relational algebra, is quite intuitive; nevertheless it is able to represent most of XQuery expressions","PeriodicalId":282986,"journal":{"name":"17th International Workshop on Database and Expert Systems Applications (DEXA'06)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123023494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. E. Armendáriz-Iñigo, J. Juárez-Rodríguez, H. Decker, F. D. Muñoz-Escoí
Replication increases the availability of data. Availability, consistency and integrity are competing objectives. They need to be reconciled, and adapted to the needs of different applications and users, by appropriate replication strategies. We outline work in progress on a middleware architecture for replicated databases. It simultaneously maintains several protocols, so that it can be reconfigured on the fly to the actual needs of availability, consistency and integrity of possibly simultaneous applications and users
{"title":"Trying to Cater for Replication Consistency and Integrity of Highly Available Data","authors":"J. E. Armendáriz-Iñigo, J. Juárez-Rodríguez, H. Decker, F. D. Muñoz-Escoí","doi":"10.1109/DEXA.2006.143","DOIUrl":"https://doi.org/10.1109/DEXA.2006.143","url":null,"abstract":"Replication increases the availability of data. Availability, consistency and integrity are competing objectives. They need to be reconciled, and adapted to the needs of different applications and users, by appropriate replication strategies. We outline work in progress on a middleware architecture for replicated databases. It simultaneously maintains several protocols, so that it can be reconfigured on the fly to the actual needs of availability, consistency and integrity of possibly simultaneous applications and users","PeriodicalId":282986,"journal":{"name":"17th International Workshop on Database and Expert Systems Applications (DEXA'06)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123082594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The notion of a self-organising system as used within this paper, is of a system that optimises and adapts its architectural composition based on evidence accrued from both internal and external influences. In this way, a self-organising system is defined to be a fluid, unbounded set of components that are organised and configured on demand and at runtime in reaction to the current configuration of the system's operating environment. This paper outlines current theory and assumption in component-based self-organisation, discussing the limitations that exist when producing such systems. The paper highlights, through example, how the introduction of type-safety at a network layer aided by Zeroconf (zero configuration networking) and the author's own Neptune language can yield a powerful self-organisational model, concluding with its use within a healthcare agenda system
{"title":"Retrofitting Zeroconf to Type-Safe Self-Organising Systems","authors":"P. Miseldine, A. Taleb-Bendiab","doi":"10.1109/DEXA.2006.124","DOIUrl":"https://doi.org/10.1109/DEXA.2006.124","url":null,"abstract":"The notion of a self-organising system as used within this paper, is of a system that optimises and adapts its architectural composition based on evidence accrued from both internal and external influences. In this way, a self-organising system is defined to be a fluid, unbounded set of components that are organised and configured on demand and at runtime in reaction to the current configuration of the system's operating environment. This paper outlines current theory and assumption in component-based self-organisation, discussing the limitations that exist when producing such systems. The paper highlights, through example, how the introduction of type-safety at a network layer aided by Zeroconf (zero configuration networking) and the author's own Neptune language can yield a powerful self-organisational model, concluding with its use within a healthcare agenda system","PeriodicalId":282986,"journal":{"name":"17th International Workshop on Database and Expert Systems Applications (DEXA'06)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124155173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Corradini, A. Polzonetti, Romeo Pruno, R. D'Angelo
Internet should be used to reduce distances and bring people virtually closer. Using ICT, many people has overcome the problem of digital divided (P. Norris, 2001) thanks to support of information system technologies, (e.g. email, wiky, community, Web-log, video streaming). Nowadays the communications between people using ICT hasn't a structure able to implement a rich and efficient use of information such as datum. Most of the knowledge management systems for complex organizations are based on technological architectures that are in contradiction with the social processes of information like human language. In particular, centralized architectures are adopted for to manage a process that is intrinsically distributed, such "experience". In this paper, we introduce the concept of SEA, an example of (DKM) distribute knowledge management (M. Bonifacio et al., 2002) architecture as example of an extendable and scalable system architecture for knowledge management
互联网应该用来缩短距离，拉近人与人之间的距离。利用信息通信技术，许多人克服了数字鸿沟的问题(P. Norris, 2001)，这要感谢信息系统技术的支持，(如电子邮件、维基、社区、网络日志、视频流)。目前，使用ICT的人们之间的通信还没有一个能够实现对数据等信息的丰富和有效利用的结构。大多数复杂组织的知识管理系统都是基于与人类语言等信息的社会过程相矛盾的技术架构。特别地，集中式架构被用于管理本质上是分布式的过程，例如“体验”。在本文中，我们介绍了SEA的概念，它是(DKM)分布式知识管理(M. Bonifacio et al.， 2002)体系结构的一个例子，作为知识管理的可扩展和可伸缩的系统体系结构的一个例子
{"title":"Social Enterprise Architecture: Towards an Extendable and Scaleable System Architecture for KM","authors":"F. Corradini, A. Polzonetti, Romeo Pruno, R. D'Angelo","doi":"10.1109/DEXA.2006.129","DOIUrl":"https://doi.org/10.1109/DEXA.2006.129","url":null,"abstract":"Internet should be used to reduce distances and bring people virtually closer. Using ICT, many people has overcome the problem of digital divided (P. Norris, 2001) thanks to support of information system technologies, (e.g. email, wiky, community, Web-log, video streaming). Nowadays the communications between people using ICT hasn't a structure able to implement a rich and efficient use of information such as datum. Most of the knowledge management systems for complex organizations are based on technological architectures that are in contradiction with the social processes of information like human language. In particular, centralized architectures are adopted for to manage a process that is intrinsically distributed, such \"experience\". In this paper, we introduce the concept of SEA, an example of (DKM) distribute knowledge management (M. Bonifacio et al., 2002) architecture as example of an extendable and scalable system architecture for knowledge management","PeriodicalId":282986,"journal":{"name":"17th International Workshop on Database and Expert Systems Applications (DEXA'06)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129193758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Data mining as an applied research field is still causing great expectations among organizations which want to raise the utility they are getting from their huge databases and data warehouses. There exist too few success stories about organizations having managed to satisfy even some of those expectations. This situation is very similar to the one inside the information systems (IS) field, especially earlier but even currently. The recent lively debate about the identity of the IS discipline included also the analysis concerning the customers of IS research. Inspired by IS researchers' insights related to the topic, we ask the question "who is our customer?" as data mining researchers. With this we want to raise to discussion the border that limits the topics 'acceptable' to work with as a data mining researcher. We suggest in this paper that the border should be transferred more clearly towards the direction so that beside the technical concerns also at least some user- and organization-related research questions are included
{"title":"Keynote Paper: Data Mining Researcher, Who is Your Customer? Some Issues Inspired by the Information Systems Field","authors":"S. Puuronen, Mykola Pechenizkiy, A. Tsymbal","doi":"10.1109/DEXA.2006.81","DOIUrl":"https://doi.org/10.1109/DEXA.2006.81","url":null,"abstract":"Data mining as an applied research field is still causing great expectations among organizations which want to raise the utility they are getting from their huge databases and data warehouses. There exist too few success stories about organizations having managed to satisfy even some of those expectations. This situation is very similar to the one inside the information systems (IS) field, especially earlier but even currently. The recent lively debate about the identity of the IS discipline included also the analysis concerning the customers of IS research. Inspired by IS researchers' insights related to the topic, we ask the question \"who is our customer?\" as data mining researchers. With this we want to raise to discussion the border that limits the topics 'acceptable' to work with as a data mining researcher. We suggest in this paper that the border should be transferred more clearly towards the direction so that beside the technical concerns also at least some user- and organization-related research questions are included","PeriodicalId":282986,"journal":{"name":"17th International Workshop on Database and Expert Systems Applications (DEXA'06)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123726226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As XML seems to become the preferred candidate language for the interchange of data on the Internet, the integration of distributed, heterogeneous, and autonomous XML data sources in a mediation architecture is becoming a critical issue. In this paper, we present a novel and original query rewriting algorithm for the answering of queries to XML disparate sources in the presence of XML keys. The algorithm combines features of the MiniCon (Mini-Con descriptions) and the Styx algorithms (prefix and suffix queries) into an algorithm that returns more rewritings
{"title":"Answering Queries in the Presence of XML Keys","authors":"M. Essid, Omar Boucelma, S. Bressan","doi":"10.1109/DEXA.2006.28","DOIUrl":"https://doi.org/10.1109/DEXA.2006.28","url":null,"abstract":"As XML seems to become the preferred candidate language for the interchange of data on the Internet, the integration of distributed, heterogeneous, and autonomous XML data sources in a mediation architecture is becoming a critical issue. In this paper, we present a novel and original query rewriting algorithm for the answering of queries to XML disparate sources in the presence of XML keys. The algorithm combines features of the MiniCon (Mini-Con descriptions) and the Styx algorithms (prefix and suffix queries) into an algorithm that returns more rewritings","PeriodicalId":282986,"journal":{"name":"17th International Workshop on Database and Expert Systems Applications (DEXA'06)","volume":"260 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116395364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
At present, we have a FSQL server available for Oraclecopy databases which allow us to query a fuzzy or classical database with the FSQL (fuzzy SQL) language for any data type. The FSQL language is an extension of the SQL language, which permits us to write flexible conditions in our queries to a fuzzy or traditional database. In this paper, we proceed to extend FSQL into a new language called dmFSQL (data mining fuzzy structured query language) which can be used to solve real problems of clustering and classification. We consider that this model satisfies the requirements of data mining systems
{"title":"dmFSQL: a Language for Data Mining","authors":"R. Carrasco, M. Vila, F. Araque","doi":"10.1109/DEXA.2006.53","DOIUrl":"https://doi.org/10.1109/DEXA.2006.53","url":null,"abstract":"At present, we have a FSQL server available for Oraclecopy databases which allow us to query a fuzzy or classical database with the FSQL (fuzzy SQL) language for any data type. The FSQL language is an extension of the SQL language, which permits us to write flexible conditions in our queries to a fuzzy or traditional database. In this paper, we proceed to extend FSQL into a new language called dmFSQL (data mining fuzzy structured query language) which can be used to solve real problems of clustering and classification. We consider that this model satisfies the requirements of data mining systems","PeriodicalId":282986,"journal":{"name":"17th International Workshop on Database and Expert Systems Applications (DEXA'06)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124596916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Context-awareness highly depends on easy and prompt access to the right information and this needs overcoming challenges of query expression and processing of context information. One of the main considerations in querying context is selecting and applying an appropriate and expressive query language for defining user's context needs. This paper presents an overview of current languages used for querying context and investigates their strengths and limitations in expressing different aspects of context
{"title":"An Evaluation of Query Languages for Context-Aware Computing","authors":"P. D. Haghighi, A. Zaslavsky, S. Krishnaswamy","doi":"10.1109/DEXA.2006.25","DOIUrl":"https://doi.org/10.1109/DEXA.2006.25","url":null,"abstract":"Context-awareness highly depends on easy and prompt access to the right information and this needs overcoming challenges of query expression and processing of context information. One of the main considerations in querying context is selecting and applying an appropriate and expressive query language for defining user's context needs. This paper presents an overview of current languages used for querying context and investigates their strengths and limitations in expressing different aspects of context","PeriodicalId":282986,"journal":{"name":"17th International Workshop on Database and Expert Systems Applications (DEXA'06)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123808310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Privacy is fundamental to trusted collaboration and interactions to protect against malicious users and fraudulent activities. It is difficult to even impossible to preserve privacy in peer to peer large distributed system. In such networks, privacy is needed to protect the source of information, the destination (end user) of information, the route of information transmission and dissemination, and information content itself
{"title":"Innovative Ideas in Privacy Research (Keynote Talk)","authors":"B. Bhargava","doi":"10.1109/DEXA.2006.74","DOIUrl":"https://doi.org/10.1109/DEXA.2006.74","url":null,"abstract":"Privacy is fundamental to trusted collaboration and interactions to protect against malicious users and fraudulent activities. It is difficult to even impossible to preserve privacy in peer to peer large distributed system. In such networks, privacy is needed to protect the source of information, the destination (end user) of information, the route of information transmission and dissemination, and information content itself","PeriodicalId":282986,"journal":{"name":"17th International Workshop on Database and Expert Systems Applications (DEXA'06)","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122516234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fabrício Nogueira da Silva, M. C. Cavalcanti, A. M. Dávila
Scientific workflows are emerging as a suitable practice to support bio informatics experiments. Specially, in distributed environments, where workflow steps are located at different sites, workflows can create an independent and interoperable environment between the scientific applications and databases, when combined with the Web services technology. Web services have been useful as legacy code wrappers, in order to facilitate distributed workflow definition and orchestration. However, there is an increasing need to address workflow intermediate data management. This work presents the In Services system that provides support for bio informatics workflows redefinition. This redefinition enables the user to include specific data management services, according to his needs. These services are able to filter, store and retrieve data that are generated in each workflow execution step
{"title":"In Services: Data Management for In Silico Workflows","authors":"Fabrício Nogueira da Silva, M. C. Cavalcanti, A. M. Dávila","doi":"10.1109/DEXA.2006.72","DOIUrl":"https://doi.org/10.1109/DEXA.2006.72","url":null,"abstract":"Scientific workflows are emerging as a suitable practice to support bio informatics experiments. Specially, in distributed environments, where workflow steps are located at different sites, workflows can create an independent and interoperable environment between the scientific applications and databases, when combined with the Web services technology. Web services have been useful as legacy code wrappers, in order to facilitate distributed workflow definition and orchestration. However, there is an increasing need to address workflow intermediate data management. This work presents the In Services system that provides support for bio informatics workflows redefinition. This redefinition enables the user to include specific data management services, according to his needs. These services are able to filter, store and retrieve data that are generated in each workflow execution step","PeriodicalId":282986,"journal":{"name":"17th International Workshop on Database and Expert Systems Applications (DEXA'06)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121101700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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