1pub const XSD_BOOLEAN: &str = "http://www.w3.org/2001/XMLSchema#boolean";
2pub const XSD_DECIMAL: &str = "http://www.w3.org/2001/XMLSchema#decimal";
3pub const XSD_DOUBLE: &str = "http://www.w3.org/2001/XMLSchema#double";
4pub const XSD_INTEGER: &str = "http://www.w3.org/2001/XMLSchema#integer";
5pub const XSD_STRING: &str = "http://www.w3.org/2001/XMLSchema#string";
6pub const RDF_LANG_STRING: &str = "http://www.w3.org/1999/02/22-rdf-syntax-ns#langString";
7pub const RDF_FIRST: &str = "http://www.w3.org/1999/02/22-rdf-syntax-ns#first";
8pub const RDF_NIL: &str = "http://www.w3.org/1999/02/22-rdf-syntax-ns#nil";
9pub const RDF_REST: &str = "http://www.w3.org/1999/02/22-rdf-syntax-ns#rest";
10pub const RDF_TYPE: &str = "http://www.w3.org/1999/02/22-rdf-syntax-ns#type";