XML Repositories

[Ken North]

Rob Hines wrote:
>        My initial position was to go with an Object Database, in
particular
>something built around a solution like POETS Content Management System.
However,
>there have been many individuals that dislike this idea, and balk at
the idea of
>leaving the safety of the well know RDBMS community. I believe that it
is
>"natural" to use an ODBMS as an XML repository, although it "can be
done" in an
>RDBMS.

1. SQL products such as Oracle, IBM DB2, and Informix are
object-relational DBMSs. The engineering staffs at those companies have
been developing extensions for XML. There will be several important
releases in the next few months (Oracle iFS, IBM's XML Extender). You'll
have the option of storing a XML document in the database or as an
external file. When stored internally, you can decompose a document or
store it as a single column in a table.

2. POET, Bluestone, Object Design (eXcelon), and Adabas (Tamino) are
also in the XML server space.

3. "Modeling, Metadata, XML (Web Techniques, June 1999)
http://www.webtechniques.com/archives/1999/06/data/

4. Why not bring in the entire lot and do a detailed evaluation? Use one
of the courses as a test case and load its documents on all of those
products. Then you'll be able to determine how robust the product is,
whether doing SQL queries is an advantage, whether you need bindings to
multiple programming languages, which XML parser you prefer, who has the
best tools for server administration, and so on.



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