Also worth noting that historically the .Net ecosystem has massively lagged
behind Lucene versions because the Lucene.Net project has been massively
under-resourced.
dotNetRDF always used to be Lucene 3.0.3 and I think only recently started
looking at moving to Lucene 4.8 (which is the latest Lucene available for .Net
AFAIK). Jena is currently on Lucene 7.x, so I would not expect Lucene queries
that work on dotNetRDF to necessarily work with Jena because of the massive
Lucene version skew
Rob
On 15/01/2021, 18:00, "Andy Seaborne" <a...@apache.org> wrote:
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
>>>>>
>>
>
