Swish.RDF.RDFVarBinding

This module instantiates the VarBinding types and methods for use with RDF graph labels.

Documentation

type RDFVarBinding = VarBinding RDFLabel RDFLabel

RDFVarBinding is the specific type type of a variable binding value used with RDF graph queries.

nullRDFVarBinding :: RDFVarBinding

maps no query variables.

type RDFVarBindingModify = VarBindingModify RDFLabel RDFLabel

Define type of query binding modifier for RDF graph inference

type RDFOpenVarBindingModify = OpenVarBindingModify RDFLabel RDFLabel

Open variable binding modifier that operates on RDFLabel values

type RDFOpenVarBindingModifyMap = LookupMap RDFOpenVarBindingModify

Define type for lookup map of open query binding modifiers

type RDFVarBindingFilter = VarBindingFilter RDFLabel RDFLabel

RDFVarBindingFilter is a function type that tests to see if a query binding satisfies some criterion, and is used to create a variable binding modifier that simply filers given variable bindings.

Queries often want to apply some kind of filter or condition to the variable bindings that are processed. In inference rules, it sometimes seems desirable to stipulate additional conditions on the things that are matched.

This function type is used to perform such tests. A number of simple implementations are included.

rdfVarBindingUriRef :: RDFLabel -> RDFVarBindingFilter

This function generates a query binding filter that ensures an indicated variable is bound to a URI reference.

rdfVarBindingBlank :: RDFLabel -> RDFVarBindingFilter

This function generates a query binding filter that ensures an indicated variable is bound to a blank node.

rdfVarBindingLiteral :: RDFLabel -> RDFVarBindingFilter

This function generates a query binding filter that ensures an indicated variable is bound to a literal value.

rdfVarBindingUntypedLiteral :: RDFLabel -> RDFVarBindingFilter

This function generates a query binding filter that ensures an indicated variable is bound to an untyped literal value.

rdfVarBindingTypedLiteral :: RDFLabel -> RDFVarBindingFilter

This function generates a query binding filter that ensures an indicated variable is bound to a typed literal value.

rdfVarBindingXMLLiteral :: RDFLabel -> RDFVarBindingFilter

This function generates a query binding filter that ensures an indicated variable is bound to an XML literal value.

rdfVarBindingDatatyped

Arguments

:: RDFLabel

variable bound to the required datatype.

-> RDFLabel

variable bound to the literal node to be tested.

-> RDFVarBindingFilter

This function generates a query binding filter that ensures an indicated variable is bound to a literal value with a datatype whose URI is bound to another node

rdfVarBindingMemberProp :: RDFLabel -> RDFVarBindingFilter

This function generates a query binding filter that ensures an indicated variable is bound to container membership property.