XQuery Update Facility

[Jonathan Robie]

Elliotte Harold wrote:
> I've read over the latest draft of the XQuery Update facility from the 
> W3C. Two questions:
>
> 1. How close is this to XUpdate and current XML database update 
> languages?

XUpdate uses an XML syntax, and has no relationship to XQuery. The 
XQuery Update Facility is an extension of XQuery. XUpdate does not seem 
to explicitly discuss transactional semantics, which are an important 
part of the XQuery Update Facility specification.

 From informal discussions, I believe that database vendors update 
extensions to XQuery are more similar, perhaps because the original 
proposals go back to 2000, and everyone had read them.

> 2. Have any databases yet implemented the draft spec? If so, which ones?
To my knowledge, not in any commercially available software - the 
databases are using their own update extensions. However, the underlying 
model they are using for updates seems to be similar to the model of the 
XQuery Update Facility.

Hope this helps!

Jonathan

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