- From: Dare Obasanjo <dareo@microsoft.com>
- Date: Mon, 10 Jun 2002 16:25:23 -0700
- To: "Bob Schloss" <rschloss@us.ibm.com>, <nathan.crews@autodesk.com>
- Cc: <cmsmcq@w3.org>, <xmlschema-dev@w3.org>
- Message-ID: <8BD7226E07DDFF49AF5EF4030ACE0B7E0696F473@red-msg-06.redmond.corp.microsoft.com>
Setting nillable=true is not equivalent to an element whose occurence range varies between zero and infinity so that may not be an appropriate work around for a number of content models. For the cases where Bob's solution may be inadequate I'd additionally suggest a.) Use minOccurs="1" not minOccurs="0" to ensure determinism. Downside: Elements no longer optional. b.) Try combinations of namespace ="##other" & namespace="##local" for wildcards. Downside: Elements from the targetnamespace can no longer appear anywhere in the content model. -- PITHY WORDS OF WISDOM The shortest distance between two points is under repair. This posting is provided "AS IS" with no warranties, and confers no rights. -----Original Message----- From: Bob Schloss [mailto:rschloss@us.ibm.com] Sent: Monday, June 10, 2002 2:51 PM To: nathan.crews@autodesk.com Cc: cmsmcq@w3.org; xmlschema-dev@w3.org Subject: RE: XML Schema usage submission Nathan, Instead of saying <xsd:sequence> <xsd:element name="Feature" minOccurs="0" .../> <xsd:any namespace="##any".../> </xsd:sequence> perhaps you can say <xsd:sequence> <xsd:element name="Feature" nillable="true".../> <xsd:any namespace="##any"../> </xsd:sequence> although that would require documents that do not use feature to say <Feature xsi:nill="true"/> This would allow the use of any and your content models would be deterministic. Regards, Bob To: Bob Schloss/Watson/IBM@IBMUS cc: cmsmcq@w3.org, xmlschema-dev@w3.org Subject: RE: XML Schema usage submission Thanks Bob. I have tried the schema validator at sourceforge and used XMLSpy 4.4, msxml4 sp1, msxml3 sp2, and System.XML in .NET. I will add the one at IBM in the future. I can validate in all, but I do get the non-determinstic content warnings in .NET. Yes, the use of the <xs:any> attribute with in the <Feature> element is intentional. This is where application specific freeform data may or may not exist. I have tried various methods and the current one, while creating indeterminate content, does work in practice. Basically with in the <Feature> element we want freeform data to co-exist along with the deterministic content. I will have another look at the <PVI> sequencing restrictions. Can I use the <xs:any> element anywhere and still be deterministic? Nathan Crews www.landxml.org -----Original Message----- From: Bob Schloss To: nathan.crews@autodesk.com Cc: cmsmcq@w3.org; xmlschema-dev@w3.org Sent: 6/10/02 1:33 PM Subject: Re: XML Schema usage submission Nathan, I believe that your schema is not valid. I ran it through the IBM XML Schema Quality Checker (available at http://www.alphaworks.ibm.com/tech/xmlsqc <http://www.alphaworks.ibm.com/tech/xmlsqc> ) and it pointed out several problems, including 5 cases where you appear to have an ambiguous content model. Here is an image of how it looks in my browser with the SQC output styled by a stylesheet: And here is the actual output from SQC: <?xml version="1.0" encoding="UTF-8"?> <?xml-stylesheet type="text/xsl" href="file:/C:/sqc/ErrorReport.xsl"?> <schemaAnalysis SchemaQualityCheckerVersion="2.0.1" anyWarningsRequestedToBeSuppressed="false" cost="10" haltAtFirstError="false" requireEachDocumentValid="false" schemaLanguageVersion="2001-05-02"> <file fileNameWithoutPath="LandXML-1.0.xsd" filename="LandXML-1.0.xsd"> <startdatetime>2002-06-10T16:06:30</startdatetime> <error severity="1" type="2"> <source column="26" line="1265" location="file:C:/sqc/LandXML-1.0.xsd" locationWithoutPath="LandXML-1.0.xsd"/> <message>Ambiguous content model : the following particles overlap : <xs:element block="" maxOccurs="unbounded" minOccurs="0" ref="Feature"/> , <xs:any maxOccurs="1" minOccurs="1" namespace="##any"/> . </message> </error> <error severity="1" type="2"> <source column="26" line="1358" location="file:C:/sqc/LandXML-1.0.xsd" locationWithoutPath="LandXML-1.0.xsd"/> <message>Ambiguous content model : the following particles overlap : <xs:element block="" maxOccurs="1" minOccurs="0" ref="Start"/> , <xs:any maxOccurs="1" minOccurs="1" namespace="##any"/> . </message> </error> <error severity="1" type="2"> <source column="26" line="2578" location="file:C:/sqc/LandXML-1.0.xsd" locationWithoutPath="LandXML-1.0.xsd"/> <message>Ambiguous content model : the following particles overlap : <xs:element block="" maxOccurs="unbounded" minOccurs="0" ref="PVI"/> , <xs:element block="" maxOccurs="1" minOccurs="1" ref="PVI"/> . </message> </error> <error severity="1" type="2"> <source column="26" line="36" location="file:C:/sqc/LandXML-1.0.xsd" locationWithoutPath="LandXML-1.0.xsd"/> <message>Ambiguous content model : the following particles overlap : <xs:element block="" maxOccurs="1" minOccurs="1" ref="Units"/> , <xs:any maxOccurs="1" minOccurs="1" namespace="##any"/> . </message> </error> <error severity="1" type="2"> <source column="26" line="963" location="file:C:/sqc/LandXML-1.0.xsd" locationWithoutPath="LandXML-1.0.xsd"/> <message>Ambiguous content model : the following particles overlap : <xs:element maxOccurs="1" minOccurs="1" name="DocFileRef" nillable="false"> <xs:complexType> <xs:attribute name="name" use="required"/> <xs:attribute name="location" type="xs:anyURI" use="required"/> <xs:attribute name="fileType" type="xs:string" use="optional"/> <xs:attribute name="fileFormat" type="xs:string" use="optional"/> </xs:complexType> </xs:element> , <xs:any maxOccurs="1" minOccurs="1" namespace="##any"/> . </message> </error> <enddatetime>2002-06-10T16:07:19</enddatetime> </file> </schemaAnalysis> Thanks, Bob Extensible Technologies IBM Watson Research Center Yorktown Heights, NY Sent by: xmlschema-dev-request@w3.org To: xmlschema-dev@w3.org cc: cmsmcq@w3.org Subject: XML Schema usage submission I would like to contribute an XML Schema, LandXML, to the usage section of the W3 XML Schema page. The LandXML schema is defined, maintained and hosted by LandXML.org, an open organization for Land Development/Transportation Industry organization. LandXML models the civil engineering design data used to create new residential subdivisions and build new roads. Schema file name : LandXML-1.0.xsd Schema namespace: http://www.landxml.org/schema/LandXML-1.0 <http://www.landxml.org/schema/LandXML-1.0> Schema location : <http://www.landxml.org/schema/LandXML-1.0/%20LandXML-1.0.xsd> http://www.landxml.org/schema/LandXML-1.0/ LandXML-1.0.xsd Schema Description: LandXML is an emerging XML data standard for civil engineering and survey data used in the Land Development and Transportation Industries. LandXML facilitates open data exchange between software applications, provides an electronic format for design data project submission and provides a format suitable for long term archival. More Information: LandXML has a reasonably complex content model has evolved from a simple XDR schema, ( <http://www.landxml.org/schema/landxml-0.01/LandXML-0.01.xml> http://www.landxml.org/schema/landxml-0.01/LandXML-0.01.xml), over the past 3 years to use most of the features available in the latest XML Schema recommendation. The web site for the schema is <http://www.landxml.org> http://www.landxml.org, where you will find the schema, documentation, sample files and sample applications. There is also a list of world-wide participants on the <http://www.landxml.org/org.htm> http://www.landxml.org/org.htm page. LandXML is emerging as the XML standard for the Land Development and Transportation Industry by US Department of Transportation, AASHTO (American Association of State Highway Officials) and the Federal Highway Administration. LandXML is also being used and recognized internationally by Land Information New Zealand. LandXML also has strong support in the software vendor community <http://www.landxml.org/landxmlapps.htm> http://www.landxml.org/landxmlapps.htm. Please let me know if any other information is required. Nathan Crews Principal Schema Architect, <http://www.landxml.org> www.landxml.org Software Researcher Civil/Survey Software Development GIS Solutions Division Autodesk, Inc. <mailto:nathan.crews@autodesk.com> nathan.crews@autodesk.com
Received on Monday, 10 June 2002 19:25:56 UTC