Custom resources when parsing BEL Script

custom_definitions.rb

require 'bel'

# Load RDF extension; Loaded by default
BEL::Extension.load_extension 'rdf/rdf'

# Define your resources including the URI.
resource_overrides = {
  :MESHDISEASE => NamespaceDefinition.new(
      :MESHDISEASE,
      'http://resource.belframework.org/belframework/20150611/namespace/mesh-diseases.belns',
      'http://www.openbel.org/bel/namespace/mesh-disease'
    ),
}

# Parse your BEL file with the custom resources.
rdf_triples = BEL::Script.
  parse(File.open('your_file.bel'), resource_overrides).
  select   { |obj| obj.is_a? BEL::Model::Statement }.
  flat_map { |stmt| stmt.to_rdf[1] }

# Do something with triples...