John; The issue here is that the
SPARQL syntax does not allow variables in the WITH statement - see http://www.w3.org/TR/sparql11-update/ and
you will find that the syntax references WITH
IRIref, meaning only the
<> syntax is allowed.
However... we have a workaround. If you
use the URN <urn:var:Var_Name>,
where Var_Name is the name of a
bound variable (an IRI in this case), it will
get the variable name.
As an example, let's say you have defined
the argument:
sp:arg1
this is
interpreted in the script as:
?arg1
and can be used
in places
where SPARQL doesn't allow
variables as:
<urn:var:arg1>
Yea,
it's a bit of syntax,
but workable
given
some extensions
to the standards.
-- Scott
On 3/1/2013 4:22 PM, John Perdoni
wrote:
Hi again,
Is it possible to use a variable for the GRAPH clause using
sml:updateQuery in a performUpdate script module called via a
webservice.
I have a need to pass the a variable called current which is the
baseUri/graph to a script that will then first delete then update
the value of a property within this graph.
In the past (and not really understanding why) I have used GRAPH
<urn:x-var:result> {} ,but I really want to understand the
nuances involved. Reading this forum I have have come across some
possible solutions using sparql WITH, however my attempts have
come to a halt(probably due to syntax) . I tried inserting a WITH
with a variable ?current but TBC resolved it as this
WITH
<file:///J:/Documents/Semantic%20Web/TBCME_CORE%20overwrite%20when%20new%20version%20available/tbcme/?current>
DELETE {
}
INSERT {
}
WHERE {
}
So if possible could someone give me the correct syntax for an
updateQuery template that follows the following
arguments passed in via sparql motion script ?current
?propertyToBeUdated ?oldValue ?newValue
WITH {?current}
DELETE {
?current ?propertyToBeUpdated ?oldValue
}
INSERT {
?current ?propertyToBeUpdated ?newValue
}
WHERE {
.........
}
Regards
John
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