NSERC grants at Laurentian University Subventions du CRSNG `a l ...
NSERC grants at Laurentian University Subventions du CRSNG `a l ...
NSERC grants at Laurentian University Subventions du CRSNG `a l ...
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96Kalpdrum PassiIncremental Maintenance of XML SchemasA grant of $14,000 per year.Une subvention de 14 000 $ par année.Discovery Grant – Subvention à la découverteXML (eXtensible Markup Language) is a new standardfor d<strong>at</strong>a represent<strong>at</strong>ion and exchange on the Internet.XML provides tags on d<strong>at</strong>a elements, whichidentify the meaning of d<strong>at</strong>a, r<strong>at</strong>her than specifyinghow the d<strong>at</strong>a should be form<strong>at</strong>ted, as in HTML.The n<strong>at</strong>ure of d<strong>at</strong>a on the web and the flexibility ofXML have resulted in d<strong>at</strong>a encoded in XML’s beingsemi-structured. The availability of large amounts ofheterogeneous distributed d<strong>at</strong>a necessit<strong>at</strong>es integr<strong>at</strong>ing d<strong>at</strong>a from multiplesources. The d<strong>at</strong>a might be stored in different form<strong>at</strong>s in different companies.Some of the form<strong>at</strong>s include browser form<strong>at</strong>s (HTML); d<strong>at</strong>abase form<strong>at</strong>s(rel<strong>at</strong>ional and object-oriented models); and legacy d<strong>at</strong>a. The integr<strong>at</strong>ion,transform<strong>at</strong>ion and transl<strong>at</strong>ion of such d<strong>at</strong>a are increasingly important formodern inform<strong>at</strong>ion systems and e-commerce applic<strong>at</strong>ions. XML providesa common pl<strong>at</strong>form for integr<strong>at</strong>ion and exchange of d<strong>at</strong>a for the differentform<strong>at</strong>s.We provide a methodology to integr<strong>at</strong>e d<strong>at</strong>a from various sources usingXML. It is not enough to provide a mechanism for integr<strong>at</strong>ion alone as thismight be a one-time oper<strong>at</strong>ion. The d<strong>at</strong>a might change <strong>at</strong> the various localsources and it is very expensive and time consuming to upd<strong>at</strong>e the integr<strong>at</strong>edd<strong>at</strong>a from scr<strong>at</strong>ch. It is cost effective to maintain the integr<strong>at</strong>ed d<strong>at</strong>a incrementallyr<strong>at</strong>her than redoing the oper<strong>at</strong>ion again. We propose to address thisproblem as part of this research.
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