- From: Mark Feblowitz <mfeblowitz@frictionless.com>
- Date: Fri, 25 Jan 2002 13:54:47 -0500
- To: "'wu.liu@verizon.com'" <wu.liu@verizon.com>, xmlschema-dev@w3.org
I'll try this one. What you're doing is saying that elements first and second are required - that there can be at least and at most one of each. You're declaring that every thing of type MyStructType has a first and a second. Derivation by restriction only allows you to tighten restrictions on a definition, and you can't be any more constrained that minOccurs="1" and maxOccurs="1". By removing the elements you've violated derivation-ok-restriction.5.2 and by removing the sequence entirely, you've violated cos-particle-restrict.2 If you were to assign the sequence and the elements minOccurs="0", you are saying that that these occur optionally (0 or 1 time), and so removing them tightens the restriction to the tighter restriction of 0 or 0 times. That should work. ---------------------------------------------------------------------------- ---- Mark Feblowitz [t] 617.715.7231 Frictionless Commerce Incorporated [f] 617.495.0188 XML Architect [e] mfeblowitz@frictionless.com 400 Technology Square, 9th Floor Cambridge, MA 02139 www.frictionless.com -----Original Message----- From: wu.liu@verizon.com [mailto:wu.liu@verizon.com] Sent: Thursday, January 24, 2002 5:49 PM To: xmlschema-dev@w3.org Subject: complexType's typedef Hi, I have 2 data structures: =============================================== struct MyStructType { string first; string second; }; typedef MyStructType MyTypedefType; =============================================== The corresponding datatype for MyStructType in schema is: ===================================================================== <complexType name="MyStructType"> <sequence> <element name="first" type=string"/> <element name="second" type="string"/> </sequence> </complexType> ===================================================================== But how to treat typedef? The following definition gives me error: ===================================================================== <complexType name="MyTypedefType"> <restriction base="MyStructType "/> </complexType> ===================================================================== Please advise. Thanks, Wu
Received on Friday, 25 January 2002 13:55:20 UTC