AW: XML Serialization Framework: xml:lang and xml:base

Hello Christian,

 

thanks for the answers which entirely satisfy me.

 

Yours,

Thomas

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Von: public-rif-comments-request@w3.org [mailto:public-rif-comments-request@w3.org] Im Auftrag von Christian De Sainte Marie
Gesendet: Dienstag, 9. März 2010 17:24
An: krekeler@ontoprise.de
Cc: public-rif-comments@w3.org
Betreff: Re: XML Serialization Framework: xml:lang and xml:base

 


Dear Thomas, 

Thank you for your feedback. See our answers in-lined. 

Thomas Krekeler wrote 2 November 2009: 
 > 
 > = 'type' attribute for 'Const' = 
 > The list in [1] contains 
 > - Const     (individual, function, or predicate symbol, with optional 'type' 
 > attribute) 
 > On the other hand the XSD schema ([2]) explicitly defines the 'type' 
 > attribute to be required. 

You are right, the type information is mandatory for RIF constants. We have corrected that. Thank you for spotting the mistake. 
  
 > = Locator in an Import Directive = 
 > The XSD schema ([2]) element 'location' refers to 'LOCATOR' which contains a 
 > 'Const' element. 
 > Maybe the XSD schema is out dated since [3] says that a locator is not a 
 > (rif:iri) constant? 
  
The XSD is outdated: the LOCATOR is a literal of type xs:anyURI. This has been corrected in Core, BLD and FLD. 

 > = xml:lang = 
 > The definition of the 'Const' element in [2] refers to the 'xml:lang' 
 > attribute. 
 > Is this attribute for the reader's information only, or does it affect the 
 > back transformation from XML syntax to presentation syntax? 
 > If so, which of the following XML fragments are valid and what are their 
 > back transformations? 
 > <Const type="&rdf;PlainLiteral" xml:lang="en">abc</Const> 
 > <Const type="&rdf;PlainLiteral" xml:lang="en">abc@</Const> 
 > <Const type="&rdf;PlainLiteral" xml:lang="en">abc@de</Const> 

No, the xml:lang attribute is not only for the reader's information, it does affect the back transformation fro mXML to PS. As a consequence, the three RIF constants in your example would read as follows in the PS: 
"abc@en"^^rdf:plainLiteral 
"abc@@en"^^rdf:plainLiteral 
"abc@de@en"^^rdf:plainLiteral 

 > = xml:base = 
 > The xml:base specification ([4]) does not define on which URIs contained in 
 > an XML document the resolving mechanism against their base URIs applies. 
 > What about 
 > * the 'type' attribute of 'Const', 
 > * the content of the 'location' element, 
 > * the content of the 'Const' element if its type is xsd:anyURI or rif:IRI? 
  
Relative IRIs are allowed in RIF XML syntax, anywhere IRIs are allowed, including constant types, symbol spaces, location, and profile. The attribute xml:base is used to make them absolute. An section has been added in the RIF-PRD specification to make that explicit. The "base" directive in RIF-BLD presentation syntax is mapped to the xml:base attribute in the XML Document tag (see section 4.3.2 - mapping of the rule language). 

 > [1]  <http://www.w3.org/TR/rif-fld/#XML_for_the_RIF-FLD_Language> http://www.w3.org/TR/rif-fld/#XML_for_the_RIF-FLD_Language 
 > [2]  <http://www.w3.org/TR/rif-fld/#Baseline_Schema_Module> http://www.w3.org/TR/rif-fld/#Baseline_Schema_Module 
 > [3]  <http://www.w3.org/TR/rif-fld/#Well-formed_Terms_and_Formulas> http://www.w3.org/TR/rif-fld/#Well-formed_Terms_and_Formulas 
 > [4]  <http://www.w3.org/TR/xmlbase/> http://www.w3.org/TR/xmlbase/ 
  
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-The RIF WG 

---------------------------------------------------- 
Christian de Sainte Marie 

IBM
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