[xquery-talk] XQuery Blasts off at NASA

Ronald Bourret rpbourret at rpbourret.com
Wed Apr 20 23:37:44 PDT 2005

Interesting article. Some questions you may or may not be able to answer:

1) What "XML database" is being used? The section, "On XQuery in the 
Middle Tier ..." talks about eXist, but it wasn't clear if eXist is the 
database against which the XQuery API mentioned in the previous section 
is used.

2) Not quite sure I understand the section "On XQuery in the Middle 
Tier..." This says that XQuery expressions are being invoked against 
eXist, which would seem to be the data (lower) tier. Or is eXist being 
used as a mid-tier data cache, as is implied by the first bullet point?

3) Why is the aircraft data "structured in an XML format"? Is there 
something about the data that doesn't fit the relational model?


-- Ron

Tony Lavinio wrote:
> Stylus Studio is showcasing various XQuery use-cases from
> different industries to help illustrate how so many have already
> made the decision to use XQuery in their software applications
> and learn how they are benefiting from all the power,
> productivity, and the ease-of-use that XQuery has to offer. Read
> how systems integrators DynCorp (CSC) are using XQuery at
> NASA's Johnson Space Center in a real-world, live application
> for extracting and querying data from structured data contained
> in an XML database.
> http://www.stylusstudio.com/xquery/cust_nasa.html
> If you have an XQuery story to share with the XQuery community,
> email us at stylusstudio at stylusstudio.com

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