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Re: Subject: RE: A list of useful functions that aren'

Subject: Re: Subject: RE: A list of useful functions that aren't in the core of xsl.
From: Jim Melton <jim.melton@xxxxxxx>
Date: Tue, 25 Mar 2003 16:56:37 -0700
sql useful functions

I happen to work for a company for which this technology is quite important --- a database company ;^)

It is my (and our) experience that there is no one right way to "shred" hierarchical tree-structured, semi-structured data such as that represented in XML into inherently regular rectangular structures such as SQL's tables.

Instead, there are practically an infinite number of ways. Indeed, for any given XML structure definition (e.g., DTD, Schema), there are potentially dozens (or more!) ways of performing the conversion. It is my belief (perhaps, or perhaps not, shared by my employer) that the best we'll ever be able to do is use some heuristics to suggest a shredding (or mapping or conversion) based on a particular DTD or Schema, then allow the application author make changes necessitated by the application's requirements.

Reasonable people may differ and think that there's some "obvious" way to do it, possibly "reducto ad extremum" in nature, but I question how useful such an approach will be to most users.


At 10:39 2003-03-26 +1100 Wednesday, Hugh Dixon wrote:
Re "Converting a hierarchical to a pseudo relational xml format" (XSL
list, 3/22/2003).
Thanks for the mention!!
Actually I'd appreciate any suggestion/ideas/thoughts about how to go
about this, as I currently cannot see aeven an initial algorithm.
Hugh Dixon

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======================================================================== Jim Melton --- Editor of ISO/IEC 9075-* (SQL) Phone: +1.801.942.0144 Oracle Corporation Oracle Email: mailto:jim.melton@xxxxxxxxxx 1930 Viscounti Drive Standards email: mailto:jim.melton@xxxxxxx Sandy, UT 84093-1063 Personal email: mailto:jim@xxxxxxxxxxx USA Fax : +1.801.942.3345 ======================================================================== = Facts are facts. However, any opinions expressed are the opinions = = only of myself and may or may not reflect the opinions of anybody = = else with whom I may or may not have discussed the issues at hand. = ========================================================================

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