sparql with swa:Button

[Shreelakshmi G.M]

I want to display sparql query result, onclick of a button.

how can I do this ?

[Shreelakshmi G.M]

I am trying the following 

        <swa:Window arg:layoutPanel="west" arg:title="Event Publisher">

            <button onclick="{= swa:publishEvent(&quot;testQuery&quot;, &quot;&lt;swa:ResultSetObjectsView arg:resultSet=quot;{#SELECT ?class

                          WHERE {

                              ?class a owl:Class .

                          } }quot;&gt;&quot;) }">Click to Send Event</button>

        </swa:Window>

        <swa:Window arg:layoutPanel="center" arg:title="Event Subscriber">

            <swa:Subscribe arg:code="$('#label').html(data)" arg:event="testQuery"/>

            <span>Hello&nbsp;</span>

            <span id="label"/>

        </swa:Window>

    </swa:FullScreenBorderLayout>

</ui:setContext>

I know that in the above code snippet, 2nd argument of publishEvent should be string, which is not here.

How to get sparql resultset as a string and pass it over here. Is there any other way to about this ?

Thanks,

Shreelakshmi

[Holger Knublauch]

Hi Shreelakshmi,

I am not entirely clear what requirement you are implementing. It sounds like you want users to enter a SPARQL query and then have a swa:ResultSetObjectsView (or swa:ResultSetGrid?) to display the results? If yes then the following can be used (also attached as complete file):

<ui:group>
    <p>SPARQL Query:</p>
    <textarea cols="80" id="sparql" rows="10"/>
    <p>
        <button onclick="gadgets.Hub.publish('sparql', $('#sparql').val())">Execute</button>
    </p>
    <p>
        <swa:Subscribe arg:code="swa.load('results', { 'queryString': JSON.stringify(data) })" arg:event="sparql"/>
        <ui:loadable ui:loadId="results" ui:loadOnDemand="true">
            <b>Results of {= ?queryString }:</b>
            <ui:call ui:queryString="{= ?queryString }" ui:varName="results">
                <swa:ResultSetGrid arg:resultSet="{= ?results }"/>
            </ui:call>
        </ui:loadable>
    </p>
</ui:group>

Put the file into your workspace and go to http://localhost:8083/tbl/swp?_viewClass=ex:SPARQLEditor


If this is not the scenario you need, please clarify.

HTH
Holger

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[Shreelakshmi G.M]

Thanks for the reply Holger.

I need the same scenario, but I am getting error, when I tried the solution above, at line,  <ui:call ui:queryString="{= ?queryString }" ui:varName="results">

as "Undefined SWP property ui:queryString". I even changed this to ui:query, then I am getting the error as "Malformed qname".

Thanks in advance,

Shreelakshmi

On Friday, 24 July 2015 16:55:13 UTC+5:30, Shreelakshmi G.M wrote:

[Holger Knublauch]

You may need to update your TopBraid version. ui:queryString was added with version 4.5.

Holger

--

[Shreelakshmi G.M]

Is there any solution apart from updating. can I use ui:query ?

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[Shreelakshmi G.M]

I m using version 4.3

[Holger Knublauch]

I am afraid there is no built-in alternative in SWP before 4.5. However you could in principle send the query to TopBraid's SPARQL endpoint and then parse the result set in JavaScript.

Holger

[Shreelakshmi G.M]

Thanks Holger, I will try this.

[Shreelakshmi G.M]

To try the above solution I checked the this blog entry  http://www.topquadrant.com/products/FAQ_Examples/LiveSPARQLendpoint.html. in page http://www.topquadrant.com/2010/05/07/how-to-publish-your-linked-data-with-topbraid-live-sparql-endpoints/ which is not opening.

[Shreelakshmi G.M]

Hello Holger,

How can I send query to TopBraid's SPARQL endpoint. Is it through ui:CreateLink? I am getting error if I use ui:CreateLink.

Thanks,

Shreelakshmi

[Shreelakshmi G.M]

I cant enter sparql query directly in the SPARQL endpoint. User will enter the question in natural language, which will be converted to SPARQL query and shows the results.

Can this be done by invoking the SPARQL endpoint from SWA application.

Thanks,

Shreelakshmi 

[Holger Knublauch]

The workflow could be

a) User enters natural language
b) The JavaScript calls a servlet that turns that language into SPARQL via a GET request
c) The JavaScript takes this SPARQL and sends it to tbl/sparql?query=... via GET
d) The JavaScript parses the resulting JSON or XML to display result rows

I don't see SWP involved here at all.

Holger

[Shreelakshmi G.M]

Thanks Holger,

I could follow the workflow as suggested by you and it is working, but some SPARQL queries show error message when they are sent to "tbl/sparql?query=".

Thanks, 

Shreelakshmi

On Friday, 24 July 2015 16:55:13 UTC+5:30, Shreelakshmi G.M wrote:

[Holger Knublauch]

You have not provided sufficient details to get helpful responses. What is the error message, what is the query string sent to the server? Maybe you should use POST instead of GET requests to pass the query string to the service.

Holger

--

[Shreelakshmi G.M]

The query I am sending is 

SELECT  ?class

WHERE {

    ?class a owl:Class .

    ?class rdfs:subClassOf* <http://www.xyz.org/ontology/mechanisms1#Elements> .

}

I am sending it through POST request and I am getting HTTP 500 ERROR

Problem accessing /tbl/sparql. Reason:

    Invalid SPARQL query string SELECT  ?class WHERE {?class a owl:Class . ?class rdfs:subClassOf* <http://www.xyz.org/ontology/mechanisms1: Encountered " "<" "< "" at line 1, column 68. 

Was expecting one of:
    <IRIref> ...
    <PNAME_NS> ...
    <PNAME_LN> ...
    <BLANK_NODE_LABEL> ...
    <VAR1> ...
    <VAR2> ...
    "true" ...
    "false" ...
    <INTEGER> ...
    <DECIMAL> ...
    <DOUBLE> ...
    <INTEGER_POSITIVE> ...
    <DECIMAL_POSITIVE> ...
    <DOUBLE_POSITIVE> ...
    <INTEGER_NEGATIVE> ...
    <DECIMAL_NEGATIVE> ...
    <DOUBLE_NEGATIVE> ...
    <STRING_LITERAL1> ...
    <STRING_LITERAL2> ...
    <STRING_LITERAL_LONG1> ...
    <STRING_LITERAL_LONG2> ...
    "(" ...
    <NIL> ...
    "[" ...
    <ANON> ...
    "/" ...
    "|" ...
    "^" ...

 

If I go to the link http://localhost:8083/tbl/sparql and paste the same query and run it from there, I am getting the proper result.

Thanks,

Shreelakshmi

On Friday, 24 July 2015 16:55:13 UTC+5:30, Shreelakshmi G.M wrote:

[Holger Knublauch]

Please try again, and prepend the default prefix declarations, e.g. for the owl: namespace.

Holger

--

[Shreelakshmi G.M]

I am getting the same error, Is it something to do with escape character for "/" character ?

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[Shreelakshmi G.M]

If I try executing this :

PREFIX countries: <http://topbraid.org/countries#>

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>

SELECT ?name ?abbrev

WHERE

{ GRAPH <http://topbraid.org/countries>

{ ?country a countries:Country .

?country rdfs:label ?name .

?country countries:abbreviation ?abbrev .

}

}

I am getting the following error:

Problem accessing /tbl/sparql. Reason:

    Invalid SPARQL query string PREFIX countries: <http://topbraid.org/countries: Encountered " "<" "< "" at line 1, column 19.
Was expecting:
    <IRIref> ...

On Friday, 24 July 2015 16:55:13 UTC+5:30, Shreelakshmi G.M wrote:

[Jerven Tjalling Bolleman]

On 2015-08-04 08:52, Shreelakshmi G.M wrote:
> I am getting the same error, Is it something to do with escape
> character for "/" character ?

More likely the escaping of # is not done in your code that is
submitting a sparql request. Are you sure it is a POST?

Regards,
Jerven

PS. Not affiliated in any way with Topquadrant

>
> On Tue, Aug 4, 2015 at 12:14 PM, Holger Knublauch
> <hol...@topquadrant.com> wrote:
>
> Please try again, and prepend the default prefix declarations, e.g. for
> the owl: namespace.
>
> Holger
>
> On 8/4/2015 16:43, Shreelakshmi G.M wrote:
>
> The query I am sending is 

> SELECT  ?CLASS
> WHERE {
>     ?CLASS A OWL:CLASS .
>     ?CLASS RDFS:SUBCLASSOF*
> <HTTP://WWW.XYZ.ORG/ONTOLOGY/MECHANISMS1#ELEMENTS> [2] .

> }
>
> I am sending it through POST request and I am getting HTTP 500 ERROR
>
> Problem accessing /tbl/sparql. Reason:
>
> Invalid SPARQL query string SELECT ?class WHERE {?class a owl:Class .

> ?class rdfs:subClassOf* <http://www.xyz.org/ontology/mechanisms1 [1]:

> If I go to the link http://localhost:8083/tbl/sparql [3] and paste the

> same query and run it from there, I am getting the proper result.
>
> Thanks,
> Shreelakshmi
> On Friday, 24 July 2015 16:55:13 UTC+5:30, Shreelakshmi G.M wrote:
> I want to display sparql query result, onclick of a button.
> how can I do this ? --
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> --
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>
>
> Links:
> ------
> [1] http://www.xyz.org/ontology/mechanisms1
> [2] http://www.xyz.org/ontology/mechanisms1#Elements
> [3] http://localhost:8083/tbl/sparql
> [4] https://groups.google.com/d/optout
> [5]
> https://groups.google.com/d/topic/topbraid-users/6IP1cH7hpnk/unsubscribe

--
Jerven Tjalling Bolleman
SIB | Swiss Institute of Bioinformatics
CMU - 1, rue Michel Servet - 1211 Geneva 4
t: +41 22 379 58 85 - f: +41 22 379 58 58
Jerven....@isb-sib.ch - http://www.isb-sib.ch

[Shreelakshmi G.M]

Thanks Holger and Jerven,

The problem is solved,

I escaped the characters in the query,

I changed the query to POST request to,

http://localhost:8083/tbl/sparql?query=SELECT  ?class WHERE {?class a owl:Class . ?class rdfs:subClassOf* <http:/%2Fwww.xyz.org%2Fontology%2Fmechanisms1%23Elements%3E .}

Thanks, 

Shreelakshmi

On Friday, 24 July 2015 16:55:13 UTC+5:30, Shreelakshmi G.M wrote: