Don; You can't use an expression in the CONSTRUCT clause, as it only
allows graph patterns. You can bind a variable using IF/smf:if and
use that in CONSTRUCT. E.g.:
CONSTRUCT
{ :someURI :someProp ?isFound
}
WHERE
{ ...
OPTIONAL {:someURI :aprop ?obj}
BIND (IF(bound(?obj), true, false) AS ?isFound)
}
This would set the value of the :someProp to true or false, depending
on whether ?obj was bound in the OPTIONAL triple pattern.
Note that I used the SPARQL 1.1 IF. The only difference between IF
and sml:if is that the third parameter (the "else" binding) is not
required in smf:if.
-- Scott
On Aug 1, 12:32 pm, Dilphat <[email protected]> wrote:
> Could you please provide a few examples of how to use smf;if in a
> CONSTRUCT statement?
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