gistfile1.php

<?php
function get_void_dataset_uri(){
	GLOBAL $cmd_pre;
	GLOBAL $cmd_post;
	$q = "select ?x where {?w <http://rdfs.org/ns/void#inDataset> ?x.}LIMIT 1";
	$cmd = $cmd_pre.$q.$cmd_post;
	$out = "";
	try{
		$out = execute_isql_command($cmd);
	}catch(Exception $e){
		echo 'iSQL error: '.$e->getMessage();
		return null;
	}
	$sr = explode("Type HELP; for help and EXIT; to exit.\n", $out);
	$sr2 = explode("\n\n", $sr[1]);
	$r = trim($sr2[0]);
	if(strlen($r)){
		return $r;
	}else{
		throw new Exception("Could not find a valid dataset uri! Terminating program.");
		exit;
	}
}

?>