RdfNamespaceMappings class

A class that provides access to RDF namespace mappings with support for custom mappings.

This immutable class provides RDF namespace prefix-to-URI mappings for common RDF vocabularies. It can be extended with custom mappings and supports the spread operator via the asMap method.

To use with the spread operator:

final mappings = {
  ...RdfNamespaceMappings().asMap(),
  'custom': 'http://example.org/custom#'
};

To create custom mappings:

final customMappings = RdfNamespaceMappings.custom({
  'ex': 'http://example.org/',
  'custom': 'http://example.org/custom#'
});

// Access a namespace URI by prefix
final exUri = customMappings['ex']; // http://example.org/