[jsdl-wg] Parameter Sweep new artefact

[geoff]

Hi,

Based on the explanation it sounds like the right thing to do as the 
functionality remains unchanged, so I agree with Michel's proposal.

gef

p.s. The only insignificant beef that I have would be that it would be a 
shame if the wg (and presumably others in a similar situation) appear 
obliged to propose sub-optimal specs due to things being broken elsewhere.


Michel Drescher wrote:
> Folks,
> 
> while reading the ParameterSweep spec draft 13, I came again to the  
> definition of the sweep:DocumentNode definition.
> 
> The DocumentNode is defined as of type xs:string containing a XPath  
> 2.0 expression.
> 
> This is the issue that I had numerous discussions with various people  
> about. Despite having different reasons for why changing this, I agree  
> with all of those people that it would be not wise to leave the  
> definition of DocumentNode as it is without amending it.
> 
> In short, XML tooling does not universally provide namespace bindings  
> declared in the containing XML document ([XML Namespace] spec is in  
> complete silence whether namespace bindings are in scope for XML  
> *content*), or do not guarantee that namespace bindings are up to date  
> to match the prefixes used in the XPath expression. That means that  
> the XPath processor has no guarantee that it can resolve all prefixes  
> used in the XPath expression can be resolved to the correct  
> namespaces, or even to any namespace at all.
> 
> The solution is to make the namespace bindings explicit that have been  
> used to construct the XPath expression. That way, the ParameterSweep  
> specification is independent of the tooling used by any implementer  
> (which is a good thing :-).
> 
> I therefore propose to amend the DocumentNode element with an  
> attribute that makes the bindings explicit as follows:
> 
> The attribute shall be named "mapping", and shall be defined as a  
> mandatory anonymous XML attribute on the DocumentNode element.
> 
> The attribute shall be of type "list of Strings" further constrained  
> as follows:
> - It MUST have an even number of string parts.
> - The list MUST be formed as follows:
>    Part 0: Namespace URI
>    Part 1: Prefix for part 0
>    Part n+2: Namespace URI
>    Part n+3: Prefix for Part n+2
> 
> The following is a brief example how the DocumentNode element would be  
> used in a Sweep:
> 
> <sweep:DocumentNode
>          mapping="http://schemas.ggf.org/jsdl/2005/11/jsdl-posix foo http://schemas.ggf.org/jsdl/2005/11/jsdl-posix 
>   bar">
>      //foo:POSIXApplication/bar:Argument[4]
> <sweep:DocumentNode>
> 
> Note that the example is quite artificial as it binds the same  
> namespace to two different prefixes. Nonetheless, it is a valid example.
> 
> I will also add a tracker issue for this.
> 
> Comments please?
> 
> Cheers,
> Michel
> 
> --
> Michel Drescher
> Fujitsu Laboratories of Europe, Ltd.
> Hayes Park Central
> Hayes End Road
> Hayes, Middlesex UB4 8FE
> Reg. No. 4153469
> 
> +44 20 8606 4834
> Michel.Drescher at uk.fujitsu.com
> 
> 
> 
> 
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