let xsl_index = safe_getenv "HTTP_GETTER_XSL_INDEXNAME"
let xml_dir = safe_getenv "HTTP_GETTER_XML_DIR"
let rdf_dir = safe_getenv "HTTP_GETTER_RDF_DIR"
let xsl_index = safe_getenv "HTTP_GETTER_XSL_INDEXNAME"
let xml_dir = safe_getenv "HTTP_GETTER_XML_DIR"
let rdf_dir = safe_getenv "HTTP_GETTER_RDF_DIR"