2071 2005-09-09 03:01:48 +0000 R-081: Error in Primer example of identity constraints 2009-04-21 19:24:57 +0000 1 1 1 Unclassified XML Schema Primer: XSD Part 0 1.0 only All All CLOSED FIXED P2 normal --- 1 sandygao David_E3 www-xml-schema-comments oldest_to_newest 5954 0 sandygao 2005-09-09 03:01:49 +0000 There is an error in the example of section 5.1 of the Primer (entitled "A Unique Composed Value"): <unique name="dummy1"> <selector xpath="r:regions/r:zip"/> <field xpath="@code"/> <field xpath="r:part/@number"/> </unique> The rules of identity constraints say that the field xpath should only return one node for each node selected by the selector [1]. In this case, an r:zip can contain many r:parts, each with their own number attribute. This violates the rule. See: http://lists.w3.org/Archives/Public/www-xml-schema-comments/2001OctDec/0055.html 5955 1 sandygao 2005-09-09 03:02:04 +0000 The WG agreed that the commentator was correct. Priscilla proposed the following erratum to the WG: http://lists.w3.org/Archives/Member/w3c-xml-schema-wg/2002Jan/0050.html New proposed erratum available at: http://lists.w3.org/Archives/Member/w3c-xml-schema-ig/2002Aug/0010.html Text approved at Sept. 13 concall. Erratum E0-26 added.