[xquery-talk] Re: The State of Native XML databases

[Michael Rys]

None of DB2, Oracle or Microsoft SQL Server require an XML Schema.

They have the option to associate a schema or a collection of schemas which then enforces validity.

Best regards
Michael

-----Original Message-----
From: talk-bounces at x-query.com [mailto:talk-bounces at x-query.com] On Behalf Of John Snelson
Sent: Tuesday, August 21, 2007 5:26 AM
To: Elliotte Harold
Cc: Ilya Sterin; talk at xquery.com; Dr Orlovsky MA
Subject: Re: [xquery-talk] Re: The State of Native XML databases

Elliotte Harold wrote:
> Ilya Sterin wrote:
>
>> I don't necessarily debate the schema itself, but there must be a DDL
>> to represent the schema, right?
>
> There doesn't have to be a schema at all, nor do the documents you put
> into a database necessarily have to conmform to a schema if there is
> one. (One big difference between SQL and XML).
>
> Do any of the XML databases out there actually require that users
> provide a schema and then automatically reject all documents that do not
> conform to that schema?

It's my understanding that XML support in a number of the big relational
databases requires an XML Schema, and cannot store documents that do not
conform to the schema.

John
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