2020 2005-09-07 20:22:52 +0000 R-042: Potential problem with particle derivation Choice:Choice rules 2009-04-21 19:24:51 +0000 1 1 1 Unclassified XML Schema Structures: XSD Part 1 1.0 only All All CLOSED LATER P2 normal --- 1 sandygao ht www-xml-schema-comments oldest_to_newest 5829 0 sandygao 2005-09-07 20:22:52 +0000 The particle derivation rules for "RecurseLax" appear to prohibit the following type derivation. Was this intentional, or should the rules be modified to permit such a derivation? The mail below suggests a possible modification of the rules. <xs:complexType name="B"> <xs:choice minOccurs="1" maxOccurs="1"> <xs:group minOccurs="0" maxOccurs="1" ref="ChoiceGroup"/> <xs:element name="e"/> </xs:choice> </xs:complexType> <xs:complexType name="derived"> <xs:complexContent> <xs:restriction base="xs:B"> <xs:group minOccurs="0" maxOccurs="1" ref="ChoiceGroup"/> </xs:restriction> </xs:complexContent> </xs:complexType> <xs:group name="ChoiceGroup"> <xs:choice> <xs:element name="e2"/> <xs:element name="e3"/> </xs:choice> </xs:group> See http://lists.w3.org/Archives/Public/www-xml-schema-comments/2001JulSep/0035.html 5830 1 sandygao 2005-09-07 20:23:45 +0000 As per issue 2002 (R-024), the WG has decided that although the rules have some awkward results, they are not in error. The issue will be added to a list of items to consider for a future revision of XML Schema.