I suspect you need to now provide a forth variable on the right hand
side, e.g.
("term" ?facetFilters 0 100 false) smf:luceneQuery (?result ?score
?total ?homeGraph)
Holger
On 2021-08-03 2:14 am, Matt Goldberg wrote:
Hello-
I had been successfully using smf:luceneQuery before upgrading to EDG
7. If I run the example query you provided earlier in this thread
SELECT ?result ?score ?total
WHERE {
("term" ?facetFilters 0 100 false) smf:luceneQuery (?result ?score
?total)
}
in EDG or TBC 6.3.2, it works fine. If I run the same query in EDG/TBC
7.0.3, I get the following error:
Failed to execute SPARQL request: java.lang.IndexOutOfBoundsException:
Index 3 out of bounds for length 3
Any ideas why this might be happening?
Thanks.
On Tuesday, November 10, 2020 at 7:20:12 PM UTC-5 Matt Goldberg wrote:
There's a few use cases we're looking at. At the moment, the
primary use case involves a proof of concept regarding a global
search that federates a free text query. We have some other
systems that also support Lucene, so the idea is that at least all
the basic operators would work (at least *, ?, OR, AND, NOT) to
provide moderately consistent performance across systems. I wrote
a SWP service that uses smf:luceneQuery, which does work nicely in
terms of the query itself, but it does run into the challenges you
mentioned above.
On Tuesday, November 10, 2020 at 5:24:56 PM UTC-5 Holger Knublauch
wrote:
I guess that's true. Due to the nature of the "normal"
requirements that this feature is used for, it will take the
input string and post-process it beyond recognition, for
example to inject the names of the target graphs, to split
multiple words into AND and to wrap each term with * ... *.
However, you can use OR in between words.
What operators in particular do you need?
Holger
On 11/11/2020 3:27 AM, Matt Goldberg wrote:
Hello-
Is it true that textindex:query magic property cannot support
the Lucene operators?
Thanks.
On Friday, November 6, 2020 at 1:06:59 PM UTC-5 Matt Goldberg
wrote:
Thanks for the heads up. I'll continue experimenting.
On Thursday, November 5, 2020 at 6:49:55 PM UTC-5 Holger
Knublauch wrote:
Hi Matt,
smf:luceneQuery is in fact the magic property that
Search the EDG is using, but without knowing more
about your specific use case I would say 'use with
caution' as the magic property is really meant for
use with in SWP and has some quirks.
For example, the user must define a limit, facets are
kind of a pain to pass through, target graphs must
opt in, working copies are out of scope, and lastly
all graphs in the index are queried - the only way to
narrow the scope is by providing a graph facet.
But generally speaking this should work
(params are: search term, facets, offset, limit,
advanced syntax (when true the magic property will
use the input verbatim, essentially allowing lucene
operands to be utilized)
SELECT ?result ?score ?total
WHERE {
("term" ?facetFilters 0 100 false) smf:luceneQuery
(?result ?score ?total)
}
If the user needs facets, we'd have to work up a more
thorough example, which would involve temp graphs.
So the alternative would be to use the
textindex:query magic property while iterating over
the properties of interest.
Holger
On 11/6/2020 12:12 AM, Matt Goldberg wrote:
That magic property requires a specific property to
search values of, which is not quite what I want at
the moment. After digging some more, I found
smf:luceneQuery which appears to return similar
results to Search the EDG. Is there any caveats with
using this magic property?
On Wednesday, November 4, 2020 at 6:04:54 PM UTC-5
Holger Knublauch wrote:
Hi Matt,
yes there are functions in the textindex
namespace (http://topbraid.org/textindex#
<http://topbraid.org/textindex#>)
Open the file \server.topbraidlive.org
<http://server.topbraidlive.org>\web\2018\textindex.ui.ttlx
in TBC to see their declarations.
The name of the index for EDG vocabularies is
"teamwork" - see the Text Indices admin page.
An example call would be
("teamwork" rdfs:comment "hello")
textindex:query (?subject ?score ?literal ?graph)
If you have follow-up questions, please ask here.
Holger
On 11/5/2020 8:17 AM, Matt Goldberg wrote:
Hello-
Is there a mechanism like a magic property to
query the freetext index from SPARQL? I didn't
see one mentioned in the TopBraid
documentation. I've used some other systems
that have this feature.
Thanks.
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