Use Case: Invoking a VisKo Plan

What is first

Service Composition with DataFAQs - the generic functionality that this use case employes.

VisKo accepts queries, creates a visualization plan, and invokes it by composing web services.

What we will cover

I want to mock this example up in full detail so that we can trace the RDF fragments through the pipeline. From the DataFAQs perspective, http://www.adobetutorialz.com/content_images/AdobeTechnologies/PostScript/manylines.ps is a dcat:Dataset that we're trying to evaluate with services http://iw.cs.utep.edu:8080/toolkits-sadi/ps2pdf and http://iw.cs.utep.edu:8080/toolkits-sadi/pdf2png. I still need to add the functionality to grab the output of the former and feed into the input of the latter. Once that's done, we'll have invoked a visko query plan, captured provenance of the invocation (including the original plan), and offered up the results in VoID, SD, and PROV linked data glory.

How to use DataFAQs to implement the VisKo query submission and invocation. This will lead to some new features of DataFAQs.

Notes at http://titanpad.com/ZeiMd7cOHj

Nick's Query Planners

Nick has two sadi services that generate query plans, the first service described below consumes and generates RDF (based heavily on Prov-O) that Tim initially proposed in the initial discussion http://titanpad.com/ZeiMd7cOHj. The second service consumes and generates RDF based heavily on the new visko-query vocabulary.

http://iw.cs.utep.edu/visko-sadi/planner accepts "visko-query:QueryPlanRequest" and returns a "visko-query:QueryPlan" containing a service composition chain to achieve the requested visualization.

Source Code: QueryEngine.java
Managed at http://iw.cs.utep.edu/visko-sadi
The input to the planner manylinesQueryPlanRequest.owl asks for a postscript file to be viewed in Firefox
Planner is invoked with curl -d @manylinesQueryPlanRequest.owl http://iw.cs.utep.edu/visko-sadi/planner other services that require them.
Input:

<rdf:RDF xmlns="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/queries/manylinesQueryPlanRequest.owl#"
     xml:base="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/queries/manylinesQueryPlanRequest.owl"
     xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
     xmlns:visko-query="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/ontology/visko-query.owl#"
     xmlns:prov="http://www.w3.org/ns/prov/"
     xmlns:owl="http://www.w3.org/2002/07/owl#"
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:pml-provenance="http://inference-web.org/2.0/pml-provenance.owl#"
     xmlns:dataset="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/ontology/dataset.owl#">

    <visko-query:QueryPlanRequest rdf:about="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/queries/manylinesQueryPlanRequest.owl#manylinesQueryPlanRequest">
        <prov:wasDerivedFrom>
            <dataset:PSDocument>
                <pml-provenance:hasFormat rdf:resource="https://raw.github.com/nicholasdelrio/visko/master/rdf/formats/POSTSCRIPT.owl#POSTSCRIPT"/>
                <pml-provenance:hasURL>http://www.adobetutorialz.com/content_images/AdobeTechnologies/PostScript/manylines.ps</pml-provenance:hasURL>
            </dataset:PSDocument>
        </prov:wasDerivedFrom>
        <visko-query:hasResultViewableIn rdf:resource="https://raw.github.com/nicholasdelrio/visko/master/rdf/mozilla-firefox.owl#mozilla-firefox"/>
    </visko-query:QueryPlanRequest>
    
</rdf:RDF>

Output:

<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:visko-query="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/ontology/visko-query.owl#"
    xmlns:pml-provenance="http://inference-web.org/2.0/pml-provenance.owl#"
    xmlns:prov="http://www.w3.org/ns/prov/">
  <visko-query:QueryPlan rdf:about="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/queries/manylinesQueryPlanRequest.owl#manylinesQueryPlanRequest">
    <prov:hadActivity>
      <visko-query:ServiceInvocation>
        <prov:wasInformedBy>
          <visko-query:ServiceInvocation>
            <prov:used>http://www.adobetutorialz.com/content_images/AdobeTechnologies/PostScript/manylines.ps</prov:used>
            <prov:wasAttributedTo>http://iw.cs.utep.edu:8080/toolkits-sadi/ps2pdf</prov:wasAttributedTo>
          </visko-query:ServiceInvocation>
        </prov:wasInformedBy>
        <prov:wasAttributedTo>http://iw.cs.utep.edu:8080/toolkits-sadi/pdf2png</prov:wasAttributedTo>
      </visko-query:ServiceInvocation>
    </prov:hadActivity>
  </visko-query:QueryPlan>
</rdf:RDF>

http://iw.cs.utep.edu/visko-sadi/query-planner accepts "visko-query:QueryPlanRequest" and returns a "visko-query:QueryPlan" containing a service composition chain to achieve the requested visualization.

Source Code: QueryPlanner.java
Managed at http://iw.cs.utep.edu/visko-sadi
The input to the planner manylinesQueryPlanRequest-1.owl asks for a postscript file to be viewed in Firefox
Planner is invoked with curl -d @manylinesQueryPlanRequest-1.owl http://iw.cs.utep.edu/visko-sadi/query-planner other services that require them.
Input:

<rdf:RDF
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/queries/manylinesQueryPlanRequest-1.owl#"
     xml:base="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/queries/manylinesQueryPlanRequest-1.owl"
     xmlns:visko-query="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/ontology/visko-query.owl#"
     xmlns:pml-provenance="http://inference-web.org/2.0/pml-provenance.owl#"
     xmlns:dataset="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/ontology/dataset.owl#">

    <visko-query:QueryPlanRequest rdf:about="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/queries/manylinesQueryPlanRequest-1.owl#manylinesQueryPlanRequest-1">
        <visko-query:visualizes>
            <dataset:PSDocument>
                <pml-provenance:hasFormat rdf:resource="https://raw.github.com/nicholasdelrio/visko/master/rdf/formats/POSTSCRIPT.owl#POSTSCRIPT"/>
                <pml-provenance:hasURL>http://www.adobetutorialz.com/content_images/AdobeTechnologies/PostScript/manylines.ps</pml-provenance:hasURL>
                <visko-query:viewedIn rdf:resource="https://raw.github.com/nicholasdelrio/visko/master/rdf/mozilla-firefox.owl#mozilla-firefox"/>
                <visko-query:viewedAs rdf:resource="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/ontology/visko-query.owl#wildcard"/>
            </dataset:PSDocument>
        </visko-query:visualizes>
    </visko-query:QueryPlanRequest>
</rdf:RDF>

Output:

<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:visko-query="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/ontology/visko-query.owl#">
  <visko-query:QueryPlan rdf:about="https://raw.github.com/nicholasdelrio/visko-rdf/master/rdf/queries/manylinesQueryPlanRequest-1.owl#manylinesQueryPlanRequest-1">
    <visko-query:isFinalizedWith>
      <visko-query:ServiceInvocation>
        <visko-query:precededByInvocation>
          <visko-query:ServiceInvocation>
            <visko-query:isAttributedTo>http://iw.cs.utep.edu:8080/toolkits-sadi/ps2pdf</visko-query:isAttributedTo>
          </visko-query:ServiceInvocation>
        </visko-query:precededByInvocation>
        <visko-query:isAttributedTo>http://iw.cs.utep.edu:8080/toolkits-sadi/pdf2png</visko-query:isAttributedTo>
      </visko-query:ServiceInvocation>
    </visko-query:isFinalizedWith>
  </visko-query:QueryPlan>
</rdf:RDF>

Discussion Points on Nick's Planners

Limitations: where would service parameters go? This case (ps2pdf, pdf2png) requires no parameters, but we have many
How are the SADI services associated with the abstract visko-operator:Operators?
They are implementations of the visko-operator:Operator https://raw.github.com/nicholasdelrio/visko/master/rdf/pdf-to-png.owl#pdf-to-png and https://raw.github.com/nicholasdelrio/visko/master/rdf/ps2pdf.owl#ps2pdfService respectively.

visko-planner.py is a FAqT Selector Service that accepts "VisKo queries" and returns a service composition plan to achieve the requested visualization.

Deployed at http://aquarius.tw.rpi.edu/projects/datafaqs/services/sadi/core/select-faqts/visko-planner
The input to the planner manylines.ttl asks for a postscript file to be viewed in Firefox.
Planner is invoked with curl -H "Content-Type: text/turtle" -d @manylines.ttl http://aquarius.tw.rpi.edu/projects/datafaqs/services/sadi/core/select-faqts/visko-planner

TODO: We want it to return something like:

<service-invocation-2>   # Do this one second.
  a prov:Activity;
  prov:wasAttributedTo <https://raw.github.com/nicholasdelrio/visko/master/rdf/ps2pdf.owl#ps2pdfService-as-sadi>;
  prov:wasInformedBy <service-invocation-1>;
.

<service-invocation-1>   # Do this one first
   a prov:Activity;
     prov:wasAttributedTo <https://raw.github.com/nicholasdelrio/visko/master/rdf/pdf-to-png.owl#pdf-to-png-as-sadi>; 
     prov:used <http://www.adobetutorialz.com/content_images/AdobeTechnologies/PostScript/manylines.ps>;
.

<https://raw.github.com/nicholasdelrio/visko/master/rdf/pdf-to-png.owl#pdf-to-png-as-sadi>        
  a datafaqs:SADIService, OWLS:Service, prov:Agent;
  .
<https://raw.github.com/nicholasdelrio/visko/master/rdf/ps2pdf.owl#ps2pdfService-as-sadi>
  a datafaqs:SADIService, OWLS:Service, prov:Agent;
.

# TODO: plus anything that DataFAQs core needs!

http://iw.cs.utep.edu/visko-web/ViskoServletManager?requestType=query-triple-store&query= sits behind http://iw.cs.utep.edu/visko-web/sparql-query.html

Nick has the ps2pdf and pdf2png services hosted here: http://iw.cs.utep.edu:8080/toolkits-sadi/

What is next

Service Composition with DataFAQs - the generic functionality that this use case employes.

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