On 15/01/2021 12:03, Deepali Singhavi wrote:
Hi Andy,
This code is in Java and we are working on Dot Net and using Sparql to work
with Jena using DotNetRDF library.
I can see DotNetRDF is having support for Lucene but not for ElasticSearch.
DotNetRDF is a separate project.
I have tried with multiple documents but not getting how we can modify
SPARQL query to use ES advanced features like match phrases.
Can you please help me with an example of how a match phrase can be
implemented with a SPARQL query without java code? is it possible?
Have you got it working use a text based query, that is, using the
"query_string" member in JSON,direct to the ES API?
Andy
Regards,
Deepali
On Wed, Jan 13, 2021 at 3:17 PM Lorenz Buehmann <
buehm...@informatik.uni-leipzig.de> wrote:
that's not gonna work ...
text:query:match_phrase
is an invalid SPARQL predicate. You can try to put the "match_phrase"
into the query string, but I don't think it will work. A "query string
query" is used via the ES Java API [1]
Syntax can be found online [2]
[1]
https://github.com/apache/jena/blob/master/jena-text-es/src/main/java/org/apache/jena/query/text/es/TextIndexES.java#L409
[2]
https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-query-string-query.html
On 13.01.21 06:58, Deepali Singhavi wrote:
Hi Andy,
I have gone through the elastic search documentation and I know there is
an
option of *match_phrase *but I want to know how it will work with SPARQL
query.
For example I have tried the below query but it is not working so I want
to
understand the syntax.
prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
prefix star: <http://stardog.com/tutorial/>
PREFIX text: <http://jena.apache.org/text#>
select ?subject ?object
from <urn:music>
WHERE {
?subject *text:query:match_phrase* (star:description "\"rock band
Queen\"")
.
?subject star:description ?object .
}
Regards,
Deepali
On Tue, Jan 12, 2021 at 7:52 PM Andy Seaborne <a...@apache.org> wrote:
Check the documentation for Lucene and ElasticSearch. jena-text passes
the text query straight through.
On 12/01/2021 13:32, Deepali Singhavi wrote:
Hi,
I am trying to match exact phrases using SPARQL but for Lucene it is
working but not for Elastic search. Do I need to make any changes to
make it work for ES.I have attached my sample ttl file and below is the
query
Query:
prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#
<http://www.w3.org/1999/02/22-rdf-syntax-ns#>>
prefix star: <http://stardog.com/tutorial/
<http://stardog.com/tutorial/>>
PREFIX text: <http://jena.apache.org/text# <
http://jena.apache.org/text#
select ?subject ?object
from <urn:music>
WHERE {
?subject text:query (star:description "\"rock band Queen\"") .
?subject star:description ?object .
}
Please let me know if any other information is required from my side.
Regards,
Deepali
