Configuring Node Factories

Node Factories can be specified using the Configuration Vocabulary. The configuration loader can use this configuration to instantiate any class which implements the INodeFactory interface and has a public no-args constructor.

Basic Configuration

A vanilla Node Factory can be specified as follows:

@prefix dnr: <http://www.dotnetrdf.org/configuration#> .

_:nodeFactory a dnr:NodeFactory ;
  dnr:type "VDS.RDF.NodeFactory" .

Configuring Node Factory Options

A number of additional configuration vocabulary properties are available for setting the options on a Node Factory instance.

Setting the BaseURI

The BaseUri property can be configured as follows:

@prefix dnr: <http://www.dotnetrdf.org/configuration#> .

_:nodeFactory a dnr:NodeFactory ;
  dnr:type "VDS.RDF.NodeFactory" ;
  dnr:assignUri <http://example.org/> .

Configuring Language Tag Validation

The LanguageTagValidation property can be configured using on of the following string values:

  • false or none for no validation.
  • true or turtle for validation against the Turtle 1.1 production for language tags.
  • bcp47 or wellformed for validation against the BCP47 specification's definition of a well-formed langauge tag.
Note

The true and false values must be quoted strings, not boolean literals.

e.g. to disable language tag validation on a node factory:

@prefix dnr: <http://www.dotnetrdf.org/configuration#> .

_:nodeFactory a dnr:NodeFactory ;
  dnr:type "VDS.RDF.NodeFactory" ;
  dnr:withLanguageTagValidation "false" .

Configuring Literal Normalization

The NormalizeLiterals property can be configured using boolean value as follows:

@prefix dnr: <http://www.dotnetrdf.org/configuration#> .

_:nodeFactory a dnr:NodeFactory ;
  dnr:type "VDS.RDF.NodeFactory" ;
  dnr:normalizeLiterals true .

Configuring URI Factory

The UriFactory property can be configured using a dnr:NodeFactory node as follows:

@prefix dnr: <http://www.dotnetrdf.org/configuration#> .

_:nodeFactory a dnr:NodeFactory ;
  dnr:type "VDS.RDF.NodeFactory" ;
  dnr:usingUriFactory _:uriFactory .

_uriFactory a dnr:UriFactory ;
  dnr:type "VDS.RDF.CachingUriFactory" .