Set given link in CTS Namespace

        .. example::
            collection.set_link(NAMESPACES.CTS.about, "urn:cts:latinLit:phi1294.phi002")

        :param prop: Property to set (Without namespace)
        :param value: Value to set for given property

def set_link(self, prop, value):
        """ Set given link in CTS Namespace

        .. example::
            collection.set_link(NAMESPACES.CTS.about, "urn:cts:latinLit:phi1294.phi002")

        :param prop: Property to set (Without namespace)
        :param value: Value to set for given property
        """
        # https://rdflib.readthedocs.io/en/stable/
        # URIRef == identifiers (urn, http, URI in general)
        # Literal == String or Number (can have a language)
        # BNode == Anonymous nodes (So no specific identifier)
        #		eg. BNode : Edition(MartialEpigrams:URIRef) ---has_metadata--> Metadata(BNode)
        if not isinstance(value, URIRef):
            value = URIRef(value)

        self.metadata.add(prop, value)