+struct cql_node *cql_node_mk_sc(NMEM nmem, const char *index,
+ const char *relation, const char *term);
+
+/**
+ * This function applies a prefix+uri to "unresolved" index and relation
+ * URIs.
+ *
+ * "unresolved" URIs are those nodes where member index_uri / relation_uri
+ * is NULL.
+ */