By Keng Siau
Complicated themes in Database study is a sequence of books at the fields of database, software program engineering, and structures research and layout. They characteristic the most recent examine rules and themes on how one can improve present database structures, enhance info garage, refine latest database versions, and increase complicated purposes. complicated themes in Database study, quantity five is part of this sequence. complex themes in Database examine, quantity five provides the newest study rules and subject matters on database structures and purposes, and gives insights into vital advancements within the box of database and database administration. This publication describes the services and lines of recent applied sciences and methodologies, and offers state of the art examine principles, with an emphasis on theoretical matters relating to databases and database administration.
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Extra resources for Advanced Topics in Database Research, Vol. 5
Although XMI can be used for the interchange of models in any modelling notation, according to OMG (2000a) one of the main purposes of XMI is to serve as an interchange format for UML models. The interchange of XMI-based UML models between tools is realized by the export and import of XMI documents. 0 — specifying the legal tags and defining structure. Figure 1. Generation of XMI document for a UML model (from Stevens, 2003) UML metamodel translates to conforms to UML model XMI DTD conforms to translates to XMI document Copyright © 2006, Idea Group Inc.
Export from Model B was found to be valid, but that from Model A was not. Both validation tools stated that the exported XMI document for Model A had a structure that deviated from the standard specified by OMG. The problem related to non-conformance with an ordering dependency in the XMI DTD. This was repaired manually in order to allow tests to continue. Such repair is extremely difficult without specialised tool support because the file consists of 174,445 lines of XMI code, which in any case is very difficult for a human reader to comprehend.
22 Favre Figure 23. Translating Participates association. Step 4. spec PARTICIPATES = SET-PERSON and SET-MEETING and BINARY-ASSOCIATION [PERSON][MEETING] with BinaryAssociation |-> Participates pred isRightLinked: Participates x Person isLeftLinked: Participates x Meeting isRelated: Participates x Person x Meeting ops addLink: Participates x Person x Meeting -> Participates getParticipants: Participates x Meeting -> Set [Person] getMeetings: Participates x Person -> Set[Meeting] remove: Participates x Person x Meeting -> Participates a : Participates; p,p1: Person; m,m1: Meeting def addLink (a,p,m) < = > not isRelated (a,p,m) def getParticipants (a, m) < = > isLeftLinked (a,m) def getMeetings (a, m) < = > isRightLinked ( a, m) def remove (a,p,m) < = > isRelated (a, p, m) end Figure 24.
Advanced Topics in Database Research, Vol. 5 by Keng Siau