2613 2005-12-21 16:43:43 +0000 namespace-alias and #default 2006-03-10 21:18:22 +0000 1 1 1 Unclassified XPath / XQuery / XSLT XSLT 2.0 Candidate Recommendation PC Windows XP CLOSED FIXED P2 normal --- 1 mike mike public-qt-comments oldest_to_newest 7533 0 mike 2005-12-21 16:43:45 +0000 Some time ago, I think in response to a comment from Oliver Becker during the first last call [1], we decided that it should be an error for xsl:namespace-alias to specify stylesheet-prefix="#default" if there is no default namespace (that is, if the declaration xmlns="" is in force explicitly or implicitly). The same applies to result-prefix. I've recently got around to implementing this decision and it breaks a few XSLT 1.0 test cases. I'm not suggesting that the decision should be changed, but we should document it as a backwards-incompatibility. The XSLT 1.0 spec isn't very clear about what should happen, but some processors at least adopted the interpretation that xsl:namespace-alias should be able to move elements from the null namespace into an actual namespace or vice versa, and that capability no longer exists. [1] http://lists.w3.org/Archives/Public/public-qt-comments/2003Sep/0009.html 8012 1 400 mike 2006-01-27 19:48:47 +0000 Created attachment 400 A stylesheet that demonstrates the incompatibility 8013 2 mike 2006-01-27 19:49:09 +0000 I was actioned to provide an example of a stylesheet that demonstrates this incompatibility. An example is attached (it can be used with any source document). Note that it's unclear in the XSLT 1.0 spec whether this should work or not, but it does work in Saxon and may well work in other processors. Under Saxon 6.5.5 it produces the result: <?xml version="1.0" encoding="utf-8"?> <out xmlns="ns://www.error.com/" xmlns:err="ns://www.error.com/"> <banana xmlns=""> <yyy xmlns="ns://www.error.com/"/> </banana> </out> (Other processors are likely to use "err" as the namespace prefix) Under Saxon 8.6.1 it produces: Error at xsl:namespace-alias on line 11 of file:/C:/MyJava/tests/testsuite/nspc/nspc99055err.xsl: XTSE0815: #default cannot be used: there is no default namespace Failed to compile stylesheet. 1 error detected. 8112 3 mike 2006-02-02 19:34:20 +0000 Looking at the behaviour of existing XSLT 1.0 processors, some of them allow this stylesheet and others reject it. Because it would cause significant impact on anyone who is using the facility, we decided to remove this error condition and instead define that the value #default refers to the "null namespace" if no explicit namespace is bound. 8670 4 mike 2006-03-10 21:18:22 +0000 This change has been applied to the spec and the issue is now closed. 400 2006-01-27 19:48:44 +0000 2006-01-27 19:48:44 +0000 A stylesheet that demonstrates the incompatibility nspc99055err.xsl application/xml+xslt 556 mike PD94bWwgdmVyc2lvbj0iMS4wIj8+DQo8eHNsOnN0eWxlc2hlZXQNCiAgIHhtbG5zOnhzbD0iaHR0 cDovL3d3dy53My5vcmcvMTk5OS9YU0wvVHJhbnNmb3JtIiB2ZXJzaW9uPSIxLjAiDQogICANCiAg IHhtbG5zOmVycj0ibnM6Ly93d3cuZXJyb3IuY29tLyI+DQoNCjw/c3BlYyB4c2x0I25hbWVzcGFj ZS1hbGlhc2luZz8+DQo8P2Vycm9yIFhUU0UwODE1Pz4NCiAgPCEtLSBVbmRlY2xhcmVkIGRlZmF1 bHQgc3R5bGVzaGVldCBwcmVmaXggLS0+DQogIA0KPHhzbDpuYW1lc3BhY2UtYWxpYXMgc3R5bGVz aGVldC1wcmVmaXg9IiNkZWZhdWx0IiByZXN1bHQtcHJlZml4PSJlcnIiLz4NCjx4c2w6b3V0cHV0 IGluZGVudD0ieWVzIi8+ICANCg0KDQo8eHNsOnRlbXBsYXRlIG1hdGNoID0gIi8iPg0KICA8eHNs OnBhcmFtIG5hbWU9ImMiIHNlbGVjdD0iJ2JhbmFuYSciLz4NCiAgPG91dD4NCiAgICA8eHNsOmVs ZW1lbnQgbmFtZT0ieyRjfSI+DQogICAgICA8eXl5Lz4NCiAgICA8L3hzbDplbGVtZW50Pg0KICA8 L291dD4NCjwveHNsOnRlbXBsYXRlPg0KDQo8L3hzbDpzdHlsZXNoZWV0Pg==