## Uses of Class
org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

- Packages that use AbstractQueryModelNode
  Package | Description
  --- | ---
  org.eclipse.rdf4j.federated.algebra |
  org.eclipse.rdf4j.query.algebra | Abstract Query Algebra model.
  org.eclipse.rdf4j.query.algebra.evaluation.impl |
  org.eclipse.rdf4j.sail.federation.algebra |

- - ### Uses of AbstractQueryModelNode in org.eclipse.rdf4j.federated.algebra

    Subclasses of AbstractQueryModelNode in org.eclipse.rdf4j.federated.algebra
    Modifier and Type | Class and Description
    --- | ---
    `class` | `BoundFiltersNode` A `QueryModelNode` for printing the bound filter vars (e.g.
    `class` | `ConjunctiveFilterExpr` ConjunctiveFilterExpr maintains a list of conjunctive (i.e.
    `class` | `EmptyNJoin` Algebra construct representing an empty join.
    `class` | `EmptyNUnion` Algebra construct representing an empty union.
    `class` | `EmptyStatementPattern` EmptyStatementPattern represents a statement that cannot produce any results for the registered endpoints.
    `class` | `ExclusiveArbitraryLengthPath` An `ArbitraryLengthPath` node which can be evaluated at a single node.
    `class` | `ExclusiveGroup` Represents a group of `ExclusiveTupleExpr` that can only produce results at a single endpoint, the `StatementSource`.
    `class` | `ExclusiveStatement` Represents a StatementPattern that can only produce results at a single endpoint, the owner.
    `class` | `FedXLeftJoin` Abstraction of `LeftJoin` to maintain the `QueryInfo`.
    `class` | `FedXService`
    `class` | `FedXStatementPattern` Base class providing all common functionality for FedX StatementPatterns
    `class` | `FilterExpr` FilterExpr maintains information for a particular FILTER expression.
    `class` | `NJoin` A tuple expression that represents an nary-Join.
    `class` | `NTuple` Base class for any nary-tuple expression
    `class` | `NUnion` A tuple expression that represents an nary-Union.
    `class` | `PassThroughTupleExpr` Marker `TupleExpr` that is used from `FedXTupleQuery.evaluate(TupleQueryResultHandler)` to allow for passing through of results to the handler.
    `class` | `PrecompiledQueryNode` Node representing a precompiled query.
    `class` | `SingleSourceQuery` A query which has a single relevant source.
    `class` | `StatementSource` A structure representing a relevant source for some expression.
    `class` | `StatementSourcePattern` Represents statements that can produce results at a some particular endpoints, the statement sources.
    `class` | `TrueStatementPattern` A TrueStatementPattern represents a stmt with no free variables which in addition is available at one of the provided sources.

  - ### Uses of AbstractQueryModelNode in org.eclipse.rdf4j.query.algebra

    Subclasses of AbstractQueryModelNode in org.eclipse.rdf4j.query.algebra
    Modifier and Type | Class and Description
    --- | ---
    `class` | `AbstractAggregateOperator` Base class for shared functionality of aggregate operators (e.g.
    `class` | `Add`
    `class` | `AggregateOperatorBase` Deprecated. since 2.0. Use `AbstractAggregateOperator` instead.
    `class` | `And` A boolean AND operator operating on two boolean expressions.
    `class` | `ArbitraryLengthPath` A tuple expression that matches a path of arbitrary length against an RDF graph.
    `class` | `Avg` The AVG operator as defined in http://www.w3.org/TR/sparql11-query/#aggregates.
    `class` | `BinaryTupleOperator` An abstract superclass for binary tuple operators which, by definition, has two arguments.
    `class` | `BinaryValueOperator` An abstract superclass for binary value operators which, by definition, has two arguments.
    `class` | `BindingSetAssignment`
    `class` | `BNodeGenerator` A BNode generator, which generates a new BNode each time it needs to supply a value.
    `class` | `Bound` The BOUND function, as defined in SPARQL Query Language for RDF; checks if a variable is bound.
    `class` | `Clear`
    `class` | `Coalesce`
    `class` | `Compare` A comparison between two values.
    `class` | `CompareAll`
    `class` | `CompareAny`
    `class` | `CompareSubQueryValueOperator`
    `class` | `Copy`
    `class` | `Count`
    `class` | `Create`
    `class` | `Datatype` The DATATYPE function, as defined in SPARQL Query Language for RDF.
    `class` | `DeleteData`
    `class` | `DescribeOperator`
    `class` | `Difference` The MINUS set operator, which returns the result of the left tuple expression, except for the results that are also returned by the right tuple expression.
    `class` | `Distinct`
    `class` | `EmptySet` A tuple expression that contains zero solutions.
    `class` | `Exists` Checks whether the wrapped Query produces any results.
    `class` | `Extension` An extension operator that can be used to add bindings to solutions whose values are defined by `value expressions`.
    `class` | `ExtensionElem`
    `class` | `Filter` The FILTER operator, as defined in SPARQL Query Language for RDF.
    `class` | `FunctionCall` A call to an (external) function that operates on zero or more arguments.
    `class` | `Group` A tuple operator that groups tuples that have a specific set of equivalent variable bindings, and that can apply aggregate functions on the grouped results.
    `class` | `GroupConcat` The GROUP_CONCAT operator as defined in http://www.w3.org/TR/sparql11-query/#aggregates
    `class` | `GroupElem` A tuple operator that groups tuples that have a specific set of equivalent variable bindings, and that can apply aggregate functions on the grouped results.
    `class` | `If` The IF function, as defined in SPARQL 1.1 Query.
    `class` | `In` Checks whether a certain value is contained in a set of results produced by a query.
    `class` | `InsertData`
    `class` | `Intersection` The INTERSECT set operator, which returns the intersection of the result sets of two tuple expressions.
    `class` | `IRIFunction` The IRI function, as defined in SPARQL 1.1 Query Language for RDF.
    `class` | `IsBNode`
    `class` | `IsLiteral`
    `class` | `IsNumeric` IsNumeric - Boolean operator determining if the supplied expression represents a numeric value.
    `class` | `IsResource`
    `class` | `IsURI`
    `class` | `Join` A natural join between two tuple expressions.
    `class` | `Label` The LABEL function, which selects the label of literals.
    `class` | `Lang` The LANG function, as defined in SPARQL Query Language for RDF.
    `class` | `LangMatches` Checks whether a language tag (e.g.
    `class` | `LeftJoin` The LeftJoin operator, as defined in SPARQL Query Language for RDF.
    `class` | `Like` Compares the string representation of a value expression to a pattern.
    `class` | `ListMemberOperator` ValueOperator that verifies if the first of its arguments occurs in any of the subsequent arguments.
    `class` | `Load`
    `class` | `LocalName` The LOCAL NAME function, which selects the local name of URIs.
    `class` | `MathExpr` A mathematical expression consisting an operator and two arguments.
    `class` | `Max`
    `class` | `Min`
    `class` | `Modify`
    `class` | `Move`
    `class` | `MultiProjection` A "multi-projection" that can produce multiple solutions from a single set of bindings.
    `class` | `Namespace` The NAMESPACE function, which selects the namespace of URIs.
    `class` | `NAryValueOperator` An abstract superclass for N-ary value operators.
    `class` | `Not` A boolean NOT operator operating on a boolean expressions.
    `class` | `Or` A boolean OR operator operating on two boolean expressions.
    `class` | `Order` An order operator that can be used to order bindings as specified by a set of value expressions.
    `class` | `OrderElem`
    `class` | `Projection` A generalized projection (allowing the bindings to be renamed) on a tuple expression.
    `class` | `ProjectionElem`
    `class` | `ProjectionElemList`
    `class` | `QueryModelNodeBase` Deprecated. since 2.0. Use `AbstractQueryModelNode` instead.
    `class` | `QueryRoot` A semantics-less query model node that is used as the root of query model trees.
    `class` | `Reduced`
    `class` | `Regex` Compares the string representation of a value expression to a pattern.
    `class` | `SameTerm` Checks RDF term equality.
    `class` | `Sample` The SAMPLE operator as defined in http://www.w3.org/TR/sparql11-query/#aggregates
    `class` | `Service` The SERVICE keyword as defined in SERVICE definition.
    `class` | `SingletonSet` A tuple expression that contains exactly one solution with zero bindings.
    `class` | `Slice` The SLICE operator, as defined in SPARQL Query Language for RDF.
    `class` | `StatementPattern` A tuple expression that matches a statement pattern against an RDF graph.
    `class` | `Str` The STR function, as defined in SPARQL Query Language for RDF; returns the label of literals or the string representation of URIs.
    `class` | `SubQueryValueOperator`
    `class` | `Sum` The SUM operator as defined in http://www.w3.org/TR/sparql11-query/#aggregates
    `class` | `TripleRef` Triple lookup reference.
    `class` | `TupleFunctionCall` A call to a TupleFunction.
    `class` | `UnaryTupleOperator` An abstract superclass for unary tuple operators which, by definition, has one argument.
    `class` | `UnaryValueOperator` An abstract superclass for unary value operators which, by definition, has one argument.
    `class` | `Union` The UNION set operator, which return the union of the result sets of two tuple expressions.
    `class` | `ValueConstant` A ValueExpr with a constant value.
    `class` | `ValueExprTripleRef`
    `class` | `Var` A variable that can contain a Value.
    `class` | `ZeroLengthPath` A tuple expression that matches a path of length zero against an RDF graph.

    Methods in org.eclipse.rdf4j.query.algebra that return AbstractQueryModelNode
    Modifier and Type | Method and Description
    --- | ---
    `AbstractQueryModelNode` | AbstractQueryModelNode.`clone()`

  - ### Uses of AbstractQueryModelNode in org.eclipse.rdf4j.query.algebra.evaluation.impl

    Subclasses of AbstractQueryModelNode in org.eclipse.rdf4j.query.algebra.evaluation.impl
    Modifier and Type | Class and Description
    --- | ---
    `class` | `ExternalSet` Deprecated. since 3.0.

  - ### Uses of AbstractQueryModelNode in org.eclipse.rdf4j.sail.federation.algebra

    Subclasses of AbstractQueryModelNode in org.eclipse.rdf4j.sail.federation.algebra
    Modifier and Type | Class and Description
    --- | ---
    `class` | `AbstractNaryOperator<Expr extends QueryModelNode>` An abstract superclass for operators which have (zero or more) arguments.
    `class` | `AbstractNaryTupleOperator` An abstract superclass for n-ary tuple operators which have one or more arguments.
    `class` | `NaryJoin` A natural join between two tuple expressions.
    `class` | `OwnedTupleExpr` Indicates that the argument should be evaluated in a particular member.

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