- From: Thompson, Bryan B. <BRYAN.B.THOMPSON@saic.com>
- Date: Wed, 16 Mar 2005 19:22:58 -0500
- To: "'public-rdf-dawg@w3.org'" <public-rdf-dawg@w3.org>
Hello, I am trying to figure out what semantic constraints are present on the QuotedURI(Ref) for the BaseDecl and PrefixDecl productions. Are the QuotedURIRefs for BaseDecl and/or PrefixDecl _required_ to be absolute URIs? May they be relative URIs? Opaque? Are there any constraints on the kind of URI that may be used for a BaseDecl? E.g., a URN? Should the BaseDecl be used to resolve a relative URI in a PrefixDecl? The spec says that a PrefixDecl may be re-bound. However, I can not think of any use case for this. Since prefixes may only be bound at the top of the query, and since a PrefixDecl may not use a QNAME, it seems likely that re-defining a prefix will always indicate a user error. Is there any default namespace if none has been defined? If not, is it an error to write ":foo" if the default namespace has not been bound? Thanks, -bryan
Received on Thursday, 17 March 2005 00:23:10 UTC