Hi Holger,
Actually, I am using sml:ModifyPrefixes - I'm just using a variable as
the input to the addedPrefix property instead of hard-coding a prefix.
I'm not in anyway trying to manipulate a SPARQL query.
Here's the source code for the instance of ModifyPrefixes. In the full
script,?prefix_1 is set to an appropriate string upstream of the
ModifyPrefixes. I was hoping the SPARQLMotion engine would replace the
variable with its value on execution.
Tim
:Add_Prefix
a sml:ModifyPrefixes ;
rdfs:label "Add_Prefix"^^xsd:string ;
sm:next :construct_a ;
sml:addedPrefix "{?prefix_1}"^^xsd:string .
________________________________
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of Holger
Knublauch
Sent: Wednesday, October 08, 2008 8:04 PM
To: [email protected]
Subject: [tbc-users] Re: Using a variable in Modify Prefixes
Hi Tim,
no sorry, String manipulations of SPARQL queries are not supported and
won't be supported in SPARQLMotion. I would like to keep at least the
queries in the language static so that future engines can analyze
existing queries in a script, for example to optimize them. We also want
to be able to change the storage format of the queries themselves. More
on that in 3.0 :)
Why can't you use sml:ModifyPrefixes?
Holger
On Oct 8, 2008, at 3:35 PM, Smith, Tim wrote:
Hi - If I define a variable upstream of a ModifyPrefixes module, can I
use it to define a prefix via the addedPrefix property?
I was thinking of something like ?pre = "prefix <uri>" and using {?pre}
to reference it in addedPrefix in a downstream ModifyPrefixes module.
When I try this, I can define a variable to mimic the input format
required for the prefix and, but the value does not appear to be
substituted into the addedPrefix attribute. According to the help
system, all string variables of SPARQLMotion modules should be able to
accept a bound variable as input so I was hoping this might work.
Thanks,
Tim
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