force(Boolean)

If true, replace existing namespace alias. Please note that replacing a namespace is dangerous as namespaces affect preprocessing. Make sure all code that depends on a namespace is compiled after changing the registration.

keep(Boolean)

If true and Alias is already defined, keep the original binding for Prefix and succeed silently.

Without options, an attempt to redefine an alias raises a permission error.

Predefined prefixes are:

Alias	IRI prefix
dc	http://purl.org/dc/elements/1.1/
dcterms	http://purl.org/dc/terms/
eor	http://dublincore.org/2000/03/13/eor\#
foaf	http://xmlns.com/foaf/0.1/
owl	http://www.w3.org/2002/07/owl\#
rdf	http://www.w3.org/1999/02/22-rdf-syntax-ns\#
rdfs	http://www.w3.org/2000/01/rdf-schema\#
serql	http://www.openrdf.org/schema/serql\#
skos	http://www.w3.org/2004/02/skos/core\#
void	http://rdfs.org/ns/void\#
xsd	http://www.w3.org/2001/XMLSchema\#