var SIOC = function(part) {
    return "http://rdfs.org/sioc/ns#" + part;
} // SIOC

var SIOC_SERVICE = function(part) {
    return "http://rdfs.org/sioc/services#" + part;
} // SIOC

var POWDER = function(part) {
    return "http://www.w3.org/2007/05/powder#" + part;
} // POWDER

var DCT = function(part) {
    return 'http://purl.org/dc/terms/' + part;
}