Rupert,
Assuming, you are using spinmapl:buildURI2 function, query that corresponds to
the function is
SELECT ((IRI(?uri)) AS ?result)
WHERE {
BIND (spl:object(?source, ?arg1) AS ?value1) .
BIND (spl:object(?source, ?arg2) AS ?value2) .
BIND (spif:buildURI(?template, ?value1, ?value2) AS ?uri) .
}
You can see it in the mapping dialog.
If you don’t like the behavior of any of the pre-built functions, you can
create your own mapping functions, for example my:buildURI2. Simply create a
clone of spinmapl:buildURI2, give it a different name and then replace the
query with:
SELECT ((IRI(?uri)) AS ?result)
WHERE {
BIND (spl:object(?source, ?arg1) AS ?value1) .
BIND (spl:object(?source, ?arg2) AS ?value2) .
BIND (COALESCE(?value2, "") AS ?value3)
BIND (spif:buildURI(?template, ?value1, ?value3) AS ?uri) .
}
What I would do, to get the query for your new function right, is experiment
with it in the SPARQL view. Put the original query in the SPARQL view, then
make a few changes so you can test it:
SELECT ((IRI(?uri)) AS ?result)
WHERE { ?source a my:SomeClass.
BIND (spl:object(?source, my:property1) AS ?value1) .
BIND (spl:object(?source, my:property2) AS ?value2) .
BIND (spif:buildURI(?template, ?value1, ?value2) AS ?uri) .
}
Where my:SomeClass, my:property1 and my:property2 are some specific class and
properties from your model.
Now, you can run the query. Make changes to it until you are satisfied with the
result. Once you have what you need, remove {?source a my:SomeClass} triple and
turn my:property1 and my:property2 back into arguments to use the query in your
new function.
Irene
From: [email protected] [mailto:[email protected]]
On Behalf Of Rupert Smith
Sent: Wednesday, October 01, 2014 12:44 PM
To: [email protected]
Subject: [topbraid-users] Spinmap: constructing URIs with optional components
Hi All,
I've just starting using Spinmap do import some test data, and I've run into a
problem. I want the URI of the instances I'll be creating to be of the form:
http://example.org/{?1}-{?2} <http://example.org/%7b?1%7d-%7b?2%7d>
With the caveat that ?2 is optional. Currently the URI is created properly when
?2 is present, but if not nothing is created.
I have tried using the expression editor, but it's not clear to me how what you
type in the box corresponds to an actual Sparql query in terms of binding my
own variables, using OPTIONAL, BOUND, and IF. In any case I'm not having much
luck.
Any insight much appreciated
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