I'd say it's query syntax vs algebra syntax ...
On 14.05.2018 12:31, anuj kumar wrote:
> Hey guys,
> Can some one please explain me the difference between ElementWalker and
> OpWalker classes of ARQ and when to use which one.
>
> I am trying to modify an incoming SPARQL query such that I want to strip
> the FILTER portion out of the query. Here is an example incoming query:
>
>> "SELECT ?s\n" +
>> "WHERE {\n" +
>> " ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
>> <http://www.example.com/Ind#Indicator> .\n" +
>> " ?s <http://www.example.com/common#modified> ?modified .\n" +
>> " FILTER (?modified >=
>> \"2018-04-01T00:00:00.000000\"^^<http://www.w3.org/2001/XMLSchema#dateTime>)\n"
>> +
>> "} limit 100"
>>
>> And I want to convert it to:
>
>
> "SELECT ?s\n" +
> "WHERE {\n" +
> " ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
> <http://www.example.com/Ind#Indicator> .\n" +
> "} limit 100"
>
> Basically the idea is to do filtering at the Data Store level rather than
> at the application level.
>
> If I understand it correctly then I can use either of the classes to
> achieve what I want to do, but I dont know if there is some sort of benefit
> to use one over the other.
>
> Thanks,
