[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Relational Tables and structured documents
I've been exploring this area of making complex queries on a meta-data-filled object-relational database through an ODBC interface (multidimensional database, containing complex data types a la XML-Data) for a few weeks now...and, although I haven't tried to implement anything yet....it seemed like the resources might prove useful in the context of this discussion. -- Lisa http://www.cs.toronto.edu/~bonner/papers.html Anthony Bonner's Papers http://www.cs.brown.edu/research/oodb/papers/icde-format-dist.ps The AQUA Approach to Querying Lists and Trees in Object-Oriented Databases, Bharathi Subramanian, Theodore W. Leung, Scott L. Vandenberg and Stanley B. Zdonik, Proceedings of the International Conference on Data Engineering, Taipei, Taiwan, 1995 http://www.cs.brown.edu/research/oodb/papers/dbpl-93-algebra.ps The AQUA Data Model and Algebra, Theodore W. Leung, Gail Mitchell, Bharathi Subramanian, Bennet Vance, Scott L. Vandenberg and Stanley B. Zdonik, Proceedings of the Fourth International Workshop on Database Programming Languages, New York, 1993 http://www.cs.brown.edu/research/oodb/papers/dbpl-93-ordered.ps Ordered Types in the AQUA Data Model, Bharathi Subramanian, Stanley B. Zdonik, Theodore W. Leung and Scott L. Vandenberg, Proceedings of the Fourth International Workshop on Database Programming Languages, New York, 1993 http://www.cs.brown.edu/courses/cs227/papers/b0/equiv.ps Object-Oriented Queries: Equivalence and Optimization, Gail M. Shaw and Stanley B. Zdonik, Proceedings of the First Conference of Deductive and Object-Oriented Databases, Tokyo, Japan, 1989. ftp://wilma.cs.brown.edu/u/mfc/mutability.ps.Z ftp://wilma.cs.brown.edu/u/mfc/pos96.ps.Z The Effects of Mutability on Querying (~90K) Mitch Cherniack and Eui-Suk Chung, February, 1996. (Compressed Postscript) The ability of an object to mutate is one of the definingcharacteristics of Object-Oriented Databases (OODBs). But the impact of object mutability on querying is typically ignored. Presumably, this is because queries are usually assumed free of side-effects, and therefore objects are effectively immutable while they are queried. But mutability affects other object behaviors aside from how they change, such as how they are compared for equality, and if it is possible to detect that they are shared. In this paper, we show how these behaviors impact querying in general and query optimization and mutable set construction in particular. Charles Frankston wrote: > > This is a fine application for XML. As several people have pointed out, > schema extensions would be rather helpful for defining how to express > relational-style joins. Sudarshan Purohit [sudar@p...], rightfully > pointed out that XML-Data has facilities for this. Look at > http://www.microsoft.com/standards/xml/xmldata.htm#References. > > -----Original Message----- > From: Peter Murray-Rust [SMTP:peter@u...] > Sent: Thursday, March 19, 1998 4:11 AM > To: xml-dev@i... > Subject: Relational Tables and structured documents > > I have been spending the last two weeks working on a molecular > application > which essentially consists of relational tables. The application is > largely hierarchical (a protein molecule) so that it benefits from > being > recast into structured document form. I have therefore found it > useful to > create routines which generate nodes in a tree as a result of > joining tables. > > I expect this is a common operation (e.g. creation of orgCharts from > relational tables). XML would seem to provide a useful approach, > especially client-side (most humans don't read relational tables > very > well). Excuse my ignorance, but is this a sufficiently generic > application > that there are well-understood rules for it and is there scope for a > generic XML approach? > > P. > Peter Murray-Rust, Director Virtual School of Molecular Sciences, > domestic > net connection > VSMS http://www.nottingham.ac.uk/vsms, Virtual Hyperglossary > http://www.venus.co.uk/vhg > > xml-dev: A list for W3C XML Developers. To post, > mailto:xml-dev@i... > Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ > To (un)subscribe, mailto:majordomo@i... the following message; > (un)subscribe xml-dev > To subscribe to the digests, mailto:majordomo@i... the following > message; > subscribe xml-dev-digest > List coordinator, Henry Rzepa (mailto:rzepa@i...) > > xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... > Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ > To (un)subscribe, mailto:majordomo@i... the following message; > (un)subscribe xml-dev > To subscribe to the digests, mailto:majordomo@i... the following message; > subscribe xml-dev-digest > List coordinator, Henry Rzepa (mailto:rzepa@i...) xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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