By Renata de Matos Galante, Nina Edelweiss, Clesio Saraiva dos Santos (auth.), Antoni Olivé, Masatoshi Yoshikawa, Eric S. K. Yu (eds.)
The goal of the workshops held along side ER 2002, the twenty first overseas convention on Conceptual Modeling, used to be to provide contributors the opportunitytopresentanddiscussemerginghottopics,thusaddingnewpersp- tives to conceptual modeling. to fulfill this target, we chosen the subsequent 4 workshops: – 2d InternationalWorkshop on Evolution and Changein info administration (ECDM 2002) – ER/IFIP8. 1 Workshop on Conceptual Modelling ways to cellular - formation structures improvement (MobIMod 2002) – foreign Workshop on Conceptual Modeling caliber (IWCMQ 2002) – third overseas Joint Workshop on Conceptual Modeling techniques for E-business: an online provider standpoint (eCOMO 2002) ER 2002 was once prepared in order that there will be no overlap among the c- ference classes and the workshops. This complaints includes workshop papers that wererevisedby the authors following discussions through the convention. we're deeply indebted to the participants of the organizing committees and software committees of those workshops for his or her labor. July 2003 Antoni Oliv´ e, Masatoshi Yoshikawa, and Eric S. okay. Yu Workshop Co-chairs ER 2002 ECDM 2002 swap is a primary yet occasionally ignored element of knowledge and database structures. The administration of evolution and alter and the power of database, details and knowledge-based structures to house swap is an integral part in constructing and keeping really important structures. Many approachestohandlingevolutionandchangehavebeenproposedinvariousareas of information administration, and this discussion board seeks to assemble researchers and practitioners from either extra proven parts and from rising parts to examine this issue.
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Additional resources for Advanced Conceptual Modeling Techniques: ER 2002 Workshops, ECDM, MobIMod, IWCMQ, and eCOMO, Tampere, Finland, October 7-11, 2002. Revised Papers
WISE (2001). 16. : On Temporal Grouping. Proc. of the Intl. Workshop on Temporal Databases (1995). 17. : Detecting Changes in XML Documents. Proc. ICDE (2002). 18. : Towards a Temporal World-Wide Web: A Transaction Time Web Server Proc. of the Australian Database Conf. (2001). 19. : Observing Transaction-time Semantics with TTXPath. WISE (2001). 20.
3 Publishing Relational Data History as XML Documents Table 1 and 2 describe the history of employees and departments. These transaction-time tables are shown here for illustration and they are not stored in the actual database. , a single tuple for the employee in the example. Therefore, we propose to represent and preserve the evolving history of these database relations by means of the XML documents shown in Figure 1 and Figure 2. We will call these H-documents. Each element in a H-document is assigned two attributes tstart and tend, which represent the inclusive time-interval of the Preserving and Querying Histories of XML-Published Relational Databases 29 element.
Here, we will use a similar version scheme to represent and query the history of XML-published databases at the logical level. Since many diﬀerent XML-based representations can be used for publishing [29,30] the same database tables we will also study alternative representations and determines which are most suitable for supporting temporal queries. We will also show that still diﬀerent representations are needed at the physical level. 3 Publishing Relational Data History as XML Documents Table 1 and 2 describe the history of employees and departments.
Advanced Conceptual Modeling Techniques: ER 2002 Workshops, ECDM, MobIMod, IWCMQ, and eCOMO, Tampere, Finland, October 7-11, 2002. Revised Papers by Renata de Matos Galante, Nina Edelweiss, Clesio Saraiva dos Santos (auth.), Antoni Olivé, Masatoshi Yoshikawa, Eric S. K. Yu (eds.)