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Subject: [Fwd: [Fwd: Re: [xml-dev] [schema] which assertions can't you express?]]
Some interesting use case notes from XML-dev today that I feel CAM can handle (just drop the structure here intot he template 'as is' and then write some <rules> to handle the constraints). DW =========== Subject: RE: [xml-dev] [schema] which assertions can't you express ? From: "Cross, Neal - Senior Developer" <ncross@icc.co.uk> Date: Wed, 8 Sep 2004 14:36:26 +0100 To: "Philippe Poulard" <Philippe.Poulard@sophia.inria.fr>, <xml-dev@lists.xml.org> I have found that a schema is of no use to us at all because of the way that our XML is structured:- <section id="report definition"> <section id="officers"> <section id="secretary" limit="2"> <section id="name"/> <section id="appointment date"/> <section id="date of birth"/> <section id="occupation"/> <section id="address"/> <section id="disqualified flag"/> <section id="disqualified reason"/> <section id="disqualified start"/> <section id="disqualified end"/> <section id="previous address" limit="1"> <section id="address"/> </section> etc, etc. Now, how do I create a schema to represent this considering that is is indexed by the attribute value of id? -----Original Message----- From: Philippe Poulard [mailto:Philippe.Poulard@sophia.inria.fr] Sent: 08 September 2004 12:54 To: xml-dev@lists.xml.org Subject: [xml-dev] [schema] which assertions can't you express ? hi, An XML Schema is the expression of some assertions expected on an XML document class. Assertions on XML documents ensure that applications will process them without causing faults. Expressing assertions with schemas ensure that applications developpers will spend most of their time in designing data process and few of their time in controlling them. Any schema technology is designed to cover numbers of assertions expressed. However, if think that the existing schema technologies (DTD, W3C XML Schema, Relax NG, Schematron) can't express some constraint types. I have some ideas of what these constraint types might be, but I'd like to know, helped by your own experiences, which kind of useful assertions can't be expressed with these schema technologies (so frustrating). For example : -i'd like that the number of occurrences of an element is equal to a value of a given attribute (Schematron could do that) -i'd like that the value of a given attribute exists in my RDBMS -etc... Thanks in advance -- Cordialement,
--- Begin Message ---
- From: "David RR Webber (XML eBusiness)" <w3c@drrw.info>
- To: david@drrw.info
- Date: Thu, 09 Sep 2004 08:34:03 -0400
I have found that a schema is of no use to us at all because of the way that our XML is structured:- <section id="report definition"> <section id="officers"> <section id="secretary" limit="2"> <section id="name"/> <section id="appointment date"/> <section id="date of birth"/> <section id="occupation"/> <section id="address"/> <section id="disqualified flag"/> <section id="disqualified reason"/> <section id="disqualified start"/> <section id="disqualified end"/> <section id="previous address" limit="1"> <section id="address"/> </section> etc, etc. Now, how do I create a schema to represent this considering that is is indexed by the attribute value of id? -----Original Message----- From: Philippe Poulard [mailto:Philippe.Poulard@sophia.inria.fr] Sent: 08 September 2004 12:54 To: xml-dev@lists.xml.org Subject: [xml-dev] [schema] which assertions can't you express ? hi, An XML Schema is the expression of some assertions expected on an XML document class. Assertions on XML documents ensure that applications will process them without causing faults. Expressing assertions with schemas ensure that applications developpers will spend most of their time in designing data process and few of their time in controlling them. Any schema technology is designed to cover numbers of assertions expressed. However, if think that the existing schema technologies (DTD, W3C XML Schema, Relax NG, Schematron) can't express some constraint types. I have some ideas of what these constraint types might be, but I'd like to know, helped by your own experiences, which kind of useful assertions can't be expressed with these schema technologies (so frustrating). For example : -i'd like that the number of occurrences of an element is equal to a value of a given attribute (Schematron could do that) -i'd like that the value of a given attribute exists in my RDBMS -etc... Thanks in advance -- Cordialement, /// (. .) -----ooO--(_)--Ooo----- | Philippe Poulard | -------------------------- Begin Message ------ End Message ---
- From: "Cross, Neal - Senior Developer" <ncross@icc.co.uk>
- To: "Philippe Poulard" <Philippe.Poulard@sophia.inria.fr>,<xml-dev@lists.xml.org>
- Date: Wed, 8 Sep 2004 14:36:26 +0100
I have found that a schema is of no use to us at all because of the way that our XML is structured:- <section id="report definition"> <section id="officers"> <section id="secretary" limit="2"> <section id="name"/> <section id="appointment date"/> <section id="date of birth"/> <section id="occupation"/> <section id="address"/> <section id="disqualified flag"/> <section id="disqualified reason"/> <section id="disqualified start"/> <section id="disqualified end"/> <section id="previous address" limit="1"> <section id="address"/> </section> etc, etc. Now, how do I create a schema to represent this considering that is is indexed by the attribute value of id? -----Original Message----- From: Philippe Poulard [mailto:Philippe.Poulard@sophia.inria.fr] Sent: 08 September 2004 12:54 To: xml-dev@lists.xml.org Subject: [xml-dev] [schema] which assertions can't you express ? hi, An XML Schema is the expression of some assertions expected on an XML document class. Assertions on XML documents ensure that applications will process them without causing faults. Expressing assertions with schemas ensure that applications developpers will spend most of their time in designing data process and few of their time in controlling them. Any schema technology is designed to cover numbers of assertions expressed. However, if think that the existing schema technologies (DTD, W3C XML Schema, Relax NG, Schematron) can't express some constraint types. I have some ideas of what these constraint types might be, but I'd like to know, helped by your own experiences, which kind of useful assertions can't be expressed with these schema technologies (so frustrating). For example : -i'd like that the number of occurrences of an element is equal to a value of a given attribute (Schematron could do that) -i'd like that the value of a given attribute exists in my RDBMS -etc... Thanks in advance -- Cordialement, /// (. .) -----ooO--(_)--Ooo----- | Philippe Poulard | ----------------------- ----------------------------------------------------------------- The xml-dev list is sponsored by XML.org <http://www.xml.org>, an initiative of OASIS <http://www.oasis-open.org> The list archives are at http://lists.xml.org/archives/xml-dev/ To subscribe or unsubscribe from this list use the subscription manager: <http://www.oasis-open.org/mlmanage/index.php> ##################################################################################### This e-mail message has been scanned for Viruses and Content. BOSS ##################################################################################### ----------------------------------------------------------------- The xml-dev list is sponsored by XML.org <http://www.xml.org>, an initiative of OASIS <http://www.oasis-open.org> The list archives are at http://lists.xml.org/archives/xml-dev/ To subscribe or unsubscribe from this list use the subscription manager: <http://www.oasis-open.org/mlmanage/index.php>--- End Message ---
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