5 files changed, 68 insertions, 57 deletions

diff --git a/src/main/scala/rsacomb/FilteringProgram.scala b/src/main/scala/rsacomb/FilteringProgram.scala
index e9a69ff..44960e5 100644
--- a/src/main/scala/rsacomb/FilteringProgram.scala
+++ b/src/main/scala/rsacomb/FilteringProgram.scala
@@ -62,7 +62,7 @@ class FilteringProgram(query: SelectQuery, constants: List[Term])
     this.generateFilteringProgram().map(reifyRule) ++ facts
 
   private def predNI(t: Term): TupleTableAtom =
-    TupleTableAtom.rdf(t, IRI.RDF_TYPE, RSA.internal("NI"))
+    TupleTableAtom.rdf(t, IRI.RDF_TYPE, RSA.rsa("NI"))
 
   /* NOTE: we are restricting to queries that contain conjunctions of
    * atoms for the time being. This might need to be reviewed in the
@@ -92,39 +92,39 @@ class FilteringProgram(query: SelectQuery, constants: List[Term])
     def not(atom: TupleTableAtom): BodyFormula = Negation.create(atom)
     val predQM =
       TupleTableAtom.create(
-        TupleTableName.create(RSA.internal("QM").getIRI),
+        TupleTableName.create(RSA.rsa("QM").getIRI),
         (answer ++ bounded): _*
       )
     def predID(t1: Term, t2: Term) =
       TupleTableAtom.create(
-        TupleTableName.create(RSA.internal("ID").getIRI),
+        TupleTableName.create(RSA.rsa("ID").getIRI),
         (answer ++ bounded).appended(t1).appended(t2): _*
       )
     def predNAMED(t1: Term): TupleTableAtom =
-      TupleTableAtom.rdf(t1, IRI.RDF_TYPE, RSA.internal("NAMED"))
+      TupleTableAtom.rdf(t1, IRI.RDF_TYPE, RSA.rsa("NAMED"))
     def predTQ(sx: String, t1: Term, t2: Term) =
       TupleTableAtom.create(
-        TupleTableName.create(RSA.internal(s"TQ_$sx").getIRI),
+        TupleTableName.create(RSA.rsa(s"TQ_$sx").getIRI),
         (answer ++ bounded).appended(t1).appended(t2): _*
       )
     def predAQ(sx: String, t1: Term, t2: Term) =
       TupleTableAtom.create(
-        TupleTableName.create(RSA.internal(s"AQ_$sx").getIRI),
+        TupleTableName.create(RSA.rsa(s"AQ_$sx").getIRI),
         (answer ++ bounded).appended(t1).appended(t2): _*
       )
     val predFK =
       TupleTableAtom.create(
-        TupleTableName.create(RSA.internal("FK").getIRI),
+        TupleTableName.create(RSA.rsa("FK").getIRI),
         (answer ++ bounded): _*
       )
     val predSP =
       TupleTableAtom.create(
-        TupleTableName.create(RSA.internal("SP").getIRI),
+        TupleTableName.create(RSA.rsa("SP").getIRI),
         (answer ++ bounded): _*
       )
     val predANS =
       TupleTableAtom.create(
-        TupleTableName.create(RSA.internal("ANS").getIRI),
+        TupleTableName.create(RSA.rsa("ANS").getIRI),
         answer: _*
       )
 
@@ -135,7 +135,7 @@ class FilteringProgram(query: SelectQuery, constants: List[Term])
     val r3a =
       for ((v, i) <- bounded.zipWithIndex)
         yield Rule.create(
-          predID(RSA.internal(i), RSA.internal(i)),
+          predID(RSA.rsa(i), RSA.rsa(i)),
           predQM,
           not(predNI(v))
         )
@@ -160,8 +160,8 @@ class FilteringProgram(query: SelectQuery, constants: List[Term])
       role1 suffix "f",
       role2 suffix "f",
       predID(
-        RSA.internal(bounded.indexOf(role1.getArguments.get(2))),
-        RSA.internal(bounded.indexOf(role2.getArguments.get(2)))
+        RSA.rsa(bounded.indexOf(role1.getArguments.get(2))),
+        RSA.rsa(bounded.indexOf(role2.getArguments.get(2)))
       ),
       not(
         TupleTableAtom.rdf(
@@ -181,8 +181,8 @@ class FilteringProgram(query: SelectQuery, constants: List[Term])
       role1 suffix "f",
       role2 suffix "b",
       predID(
-        RSA.internal(bounded.indexOf(role1.getArguments.get(2))),
-        RSA.internal(bounded.indexOf(role2.getArguments.get(0)))
+        RSA.rsa(bounded.indexOf(role1.getArguments.get(2))),
+        RSA.rsa(bounded.indexOf(role2.getArguments.get(0)))
       ),
       not(
         TupleTableAtom.rdf(
@@ -202,8 +202,8 @@ class FilteringProgram(query: SelectQuery, constants: List[Term])
       role1 suffix "b",
       role2 suffix "b",
       predID(
-        RSA.internal(bounded.indexOf(role1.getArguments.get(0))),
-        RSA.internal(bounded.indexOf(role2.getArguments.get(0)))
+        RSA.rsa(bounded.indexOf(role1.getArguments.get(0))),
+        RSA.rsa(bounded.indexOf(role2.getArguments.get(0)))
       ),
       not(
         TupleTableAtom.rdf(
@@ -228,14 +228,14 @@ class FilteringProgram(query: SelectQuery, constants: List[Term])
       if bounded contains role2arg2
     } yield Rule.create(
       predID(
-        RSA.internal(bounded indexOf role1arg0),
-        RSA.internal(bounded indexOf role2arg0)
+        RSA.rsa(bounded indexOf role1arg0),
+        RSA.rsa(bounded indexOf role2arg0)
       ),
       role1 suffix "f",
       role2 suffix "f",
       predID(
-        RSA.internal(bounded indexOf role1arg2),
-        RSA.internal(bounded indexOf role2arg2)
+        RSA.rsa(bounded indexOf role1arg2),
+        RSA.rsa(bounded indexOf role2arg2)
       ),
       TupleTableAtom.rdf(role1arg0, RSA.EquivTo, role2arg0),
       not(predNI(role1arg0))
@@ -253,14 +253,14 @@ class FilteringProgram(query: SelectQuery, constants: List[Term])
       if bounded contains role2arg2
     } yield Rule.create(
       predID(
-        RSA.internal(bounded indexOf role1arg0),
-        RSA.internal(bounded indexOf role2arg2)
+        RSA.rsa(bounded indexOf role1arg0),
+        RSA.rsa(bounded indexOf role2arg2)
       ),
       role1 suffix "f",
       role2 suffix "b",
       predID(
-        RSA.internal(bounded indexOf role1arg2),
-        RSA.internal(bounded indexOf role2arg0)
+        RSA.rsa(bounded indexOf role1arg2),
+        RSA.rsa(bounded indexOf role2arg0)
       ),
       TupleTableAtom.rdf(role1arg0, RSA.EquivTo, role2arg2),
       not(predNI(role1arg0))
@@ -278,14 +278,14 @@ class FilteringProgram(query: SelectQuery, constants: List[Term])
       if bounded contains role2arg2
     } yield Rule.create(
       predID(
-        RSA.internal(bounded indexOf role1arg2),
-        RSA.internal(bounded indexOf role2arg2)
+        RSA.rsa(bounded indexOf role1arg2),
+        RSA.rsa(bounded indexOf role2arg2)
       ),
       role1 suffix "b",
       role2 suffix "b",
       predID(
-        RSA.internal(bounded indexOf role1arg0),
-        RSA.internal(bounded indexOf role2arg0)
+        RSA.rsa(bounded indexOf role1arg0),
+        RSA.rsa(bounded indexOf role2arg0)
       ),
       TupleTableAtom.rdf(role1arg2, RSA.EquivTo, role2arg2),
       not(predNI(role1arg2))
@@ -303,11 +303,11 @@ class FilteringProgram(query: SelectQuery, constants: List[Term])
       predAQ(sx, Variable.create("V"), Variable.create("W")),
       role suffix sx,
       predID(
-        RSA.internal(bounded indexOf arg0),
+        RSA.rsa(bounded indexOf arg0),
         Variable.create("V")
       ),
       predID(
-        RSA.internal(bounded indexOf arg2),
+        RSA.rsa(bounded indexOf arg2),
         Variable.create("W")
       )
     )
diff --git a/src/main/scala/rsacomb/Main.scala b/src/main/scala/rsacomb/Main.scala
index 596ef33..3963981 100644
--- a/src/main/scala/rsacomb/Main.scala
+++ b/src/main/scala/rsacomb/Main.scala
@@ -91,7 +91,7 @@ object RSAComb extends App {
         // Step 2. Computing the canonical model
         val nis = {
           val query =
-            "SELECT ?Y WHERE { ?X internal:EquivTo ?Y ; a internal:NAMED . }"
+            "SELECT ?Y WHERE { ?X rsa:EquivTo ?Y ; a rsa:NAMED . }"
           val cursor =
             data.createCursor(
               RSA.Prefixes,
@@ -126,7 +126,7 @@ object RSAComb extends App {
           }
           query ++= " WHERE {"
           for (i <- 0 until arity) {
-            query ++= s" ?S internal:${pred}_$i ?X$i ."
+            query ++= s" ?S rsa:${pred}_$i ?X$i ."
           }
           query ++= " }"
           // Collect answers
@@ -159,7 +159,7 @@ object RSAComb extends App {
         RDFoxUtil.submitQuery(
           data,
           RSA.Prefixes,
-          "SELECT ?X { ?X a internal:NAMED }",
+          "SELECT ?X { ?X a rsa:NAMED }",
           1
         )
 
@@ -167,7 +167,7 @@ object RSAComb extends App {
         RDFoxUtil.submitQuery(
           data,
           RSA.Prefixes,
-          "SELECT ?X { ?X a internal:NI }",
+          "SELECT ?X { ?X a rsa:NI }",
           1
         )
 
@@ -179,7 +179,7 @@ object RSAComb extends App {
         RDFoxUtil.submitQuery(
           data,
           RSA.Prefixes,
-          "SELECT ?X ?Y { ?X internal:EquivTo ?Y }",
+          "SELECT ?X ?Y { ?X rsa:EquivTo ?Y }",
           2
         )
 
@@ -200,6 +200,17 @@ object RSAComb extends App {
         println("\nSpurious answers")
         retrieveInstances("SP", filter.variables.length)
 
+        {
+          val cursor = data.createCursor(
+            RSA.Prefixes,
+            "ASK { :a a :D }",
+            new HashMap[String, String]()
+          );
+          var mul = cursor.open()
+          println(s"Answer: ${mul > 0}")
+          cursor.close();
+        }
+
         // Close connection to RDFox
         RDFoxUtil.closeConnection(server, data)
       }
diff --git a/src/main/scala/rsacomb/RDFoxClassExprConverter.scala b/src/main/scala/rsacomb/RDFoxClassExprConverter.scala
index 7f44ab1..89a1a04 100644
--- a/src/main/scala/rsacomb/RDFoxClassExprConverter.scala
+++ b/src/main/scala/rsacomb/RDFoxClassExprConverter.scala
@@ -110,8 +110,8 @@ class RDFoxClassExprConverter(
         if (unsafe.contains(prop))
           (
             List(
-              TupleTableAtom.rdf(term, RSA.internal("PE"), c),
-              TupleTableAtom.rdf(c, IRI.RDF_TYPE, RSA.internal("U"))
+              TupleTableAtom.rdf(term, RSA.rsa("PE"), c),
+              TupleTableAtom.rdf(c, IRI.RDF_TYPE, RSA.rsa("U"))
             ),
             List(),
             c
diff --git a/src/main/scala/rsacomb/RSA.scala b/src/main/scala/rsacomb/RSA.scala
index 10a9d47..98c7a4d 100644
--- a/src/main/scala/rsacomb/RSA.scala
+++ b/src/main/scala/rsacomb/RSA.scala
@@ -21,14 +21,14 @@ import scala.collection.JavaConverters._
 
 object RSA extends RSAOntology with RSAAxiom {
 
-  val Prefixes = new Prefixes()
+  val Prefixes: Prefixes = new Prefixes()
   Prefixes.declarePrefix(":", "http://example.com/rsa_example.owl#")
-  Prefixes.declarePrefix("internal:", "http://127.0.0.1/")
+  Prefixes.declarePrefix("rsa:", "http://127.0.0.1/")
   Prefixes.declarePrefix("rdf:", "http://www.w3.org/1999/02/22-rdf-syntax-ns#")
   Prefixes.declarePrefix("rdfs:", "http://www.w3.org/2000/01/rdf-schema#")
   Prefixes.declarePrefix("owl:", "http://www.w3.org/2002/07/owl#")
 
-  val EquivTo: IRI = this.internal("EquivTo")
+  val EquivTo: IRI = this.rsa("EquivTo")
 
   // Counter used to implement a simple fresh variable generator
   private var counter = -1;
@@ -44,9 +44,9 @@ object RSA extends RSAOntology with RSAAxiom {
         + name.toString
     )
 
-  def internal(name: Any): IRI =
+  def rsa(name: Any): IRI =
     IRI.create(
-      Prefixes.getPrefixIRIsByPrefixName.get("internal:").getIRI
+      Prefixes.getPrefixIRIsByPrefixName.get("rsa:").getIRI
         + name.toString
     )
 
diff --git a/src/main/scala/rsacomb/RSAOntology.scala b/src/main/scala/rsacomb/RSAOntology.scala
index 52e13e6..78460ff 100644
--- a/src/main/scala/rsacomb/RSAOntology.scala
+++ b/src/main/scala/rsacomb/RSAOntology.scala
@@ -233,7 +233,7 @@ trait RSAOntology {
     private def rsaGraph(
         data: DataStoreConnection
     ): Graph[Resource, UnDiEdge] = {
-      val query = "SELECT ?X ?Y WHERE { ?X internal:E ?Y }"
+      val query = "SELECT ?X ?Y WHERE { ?X rsa:E ?Y }"
       val cursor =
         data.createCursor(RSA.Prefixes, query, new HashMap[String, String]());
       var mul = cursor.open()
@@ -280,8 +280,8 @@ trait RSAOntology {
       val role = axiom.objectPropertyExpressionsInSignature(0)
       if (this.confl(role).contains(role)) {
         Set(
-          RSA.internal("v0_" ++ RSA.hashed(axiom)),
-          RSA.internal("v1_" ++ RSA.hashed(axiom))
+          RSA.rsa("v0_" ++ RSA.hashed(axiom)),
+          RSA.rsa("v1_" ++ RSA.hashed(axiom))
         )
       } else {
         Set()
@@ -308,9 +308,9 @@ trait RSAOntology {
     //     if conflR.contains(roleS)
     //     individual =
     //       if (axiom.hashCode < axiom1.hashCode) {
-    //         RSA.internal("v0_" ++ axiom1.hashCode.toString())
+    //         RSA.rsa("v0_" ++ axiom1.hashCode.toString())
     //       } else {
-    //         RSA.internal("v1_" ++ axiom1.hashCode.toString())
+    //         RSA.rsa("v1_" ++ axiom1.hashCode.toString())
     //       }
     //   } yield individual
     // }
@@ -347,11 +347,11 @@ trait RSAOntology {
         tripleDSC = RSA.hashed(classD, roleS, classC)
         individual =
           if (tripleARB > tripleDSC) {
-            RSA.internal("v1_" ++ tripleDSC)
+            RSA.rsa("v1_" ++ tripleDSC)
           } else {
             // Note that this is also the case for
             // `tripleARB == tripleDSC`
-            RSA.internal("v0_" ++ tripleDSC)
+            RSA.rsa("v0_" ++ tripleDSC)
           }
       } yield individual
     }
@@ -366,7 +366,7 @@ trait RSAOntology {
       val named: List[Rule] =
         individuals.map(a =>
           Rule.create(
-            TupleTableAtom.rdf(a, IRI.RDF_TYPE, RSA.internal("NAMED"))
+            TupleTableAtom.rdf(a, IRI.RDF_TYPE, RSA.rsa("NAMED"))
           )
         )
 
@@ -539,7 +539,7 @@ trait RSAOntology {
         private def rules1(axiom: OWLSubClassOfAxiom): List[Rule] = {
           val unfold = ontology.unfold(axiom).toList
           // Fresh Variables
-          val v0 = RSA.internal("v0_" ++ RSA.hashed(axiom))
+          val v0 = RSA.rsa("v0_" ++ RSA.hashed(axiom))
           val varX = Variable.create("X")
           // Predicates
           val atomA: TupleTableAtom = {
@@ -549,8 +549,8 @@ trait RSAOntology {
           def in(t: Term): TupleTableAtom = {
             TupleTableAtom.rdf(
               t,
-              RSA.internal("IN"),
-              RSA.internal(unfold.hashCode.toString)
+              RSA.rsa("IN"),
+              RSA.rsa(unfold.hashCode.toString)
             )
           }
           def notIn(t: Term): Negation = Negation.create(in(t))
@@ -590,9 +590,9 @@ trait RSAOntology {
               .getProperty
           if (ontology.confl(roleR) contains roleR) {
             // Fresh Variables
-            val v0 = RSA.internal("v0_" ++ RSA.hashed(axiom))
-            val v1 = RSA.internal("v1_" ++ RSA.hashed(axiom))
-            val v2 = RSA.internal("v2_" ++ RSA.hashed(axiom))
+            val v0 = RSA.rsa("v0_" ++ RSA.hashed(axiom))
+            val v1 = RSA.rsa("v1_" ++ RSA.hashed(axiom))
+            val v2 = RSA.rsa("v2_" ++ RSA.hashed(axiom))
             // Predicates
             def atomA(t: Term): TupleTableAtom = {
               val cls = axiom.getSubClass.asInstanceOf[OWLClass].getIRI
@@ -630,7 +630,7 @@ trait RSAOntology {
               .asInstanceOf[OWLObjectSomeValuesFrom]
               .getProperty
           // Fresh Variables
-          val v1 = RSA.internal("v1_" ++ RSA.hashed(axiom))
+          val v1 = RSA.rsa("v1_" ++ RSA.hashed(axiom))
           // Predicates
           def atomA(t: Term): TupleTableAtom = {
             val cls = axiom.getSubClass.asInstanceOf[OWLClass].getIRI