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At 12:34 PM 5/12/2002 -0400, Elliotte Rusty Harold wrote:
>At 12:02 PM -0400 5/12/02, Mike Champion wrote:
>
>
>>>Where exactly does it state that?
>>
>>http://www.w3.org/TR/xquery/
>>
>>"One of the great strengths of XML is its flexibility in representing
>>many different kinds of information from diverse sources. To exploit
>>this flexibility, an XML query language must provide features for
>>retrieving and interpreting information from these diverse sources."
>>
>>"It is designed to be a small, easily implementable language in which
>>queries are concise and easily understood. It is also flexible enough
>>to query a broad spectrum of XML information sources, including both
>>databases and documents. ... XQuery is derived from an XML query
>>language called Quilt [Quilt], which in turn borrowed features from
>>several other languages, including XPath 1.0 [XPath 1.0], XQL [XQL],
>>XML-QL [XML-QL], SQL [SQL], and OQL [ODMG]."
>
>I always understood that to refer to native XML databases. I never thought
>it meant traditional relational databases. And that says nothing about
>querying objects.
Relational database vendors *are* working on mappings of relational
databases to XML so that databases can be queried using the XML view. In
fact, SQLX is working on standards for this. See the following:
The XML Data type and Publishing Functions:
ftp://SQLStandards.org/SC32/National_Bodies/USA_NCITS_H2/2002docs/H2-2002-020r1.pdf
Table Mapping:
ftp://SQLStandards.org/SC32/National_Bodies/USA_NCITS_H2/2001docs/H2-2001-373r1.pdf
Mapping non-predefined data types:
ftp://SQLStandards.org/SC32/National_Bodies/USA_NCITS_H2/2002docs/H2-2002-018.pdf
Jonathan
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