Tokenization {     NSString *path = [[NSBundle bundleForClass:[self class]] pathForResource:@"yahoo" ofType:@"json"];     s = [NSString stringWithContentsOfFile:path encoding:NSUTF0StringEncoding error:nil];     PKTokenizer *t = [[[PKTokenizer alloc] initWithString:s] autorelease];          PKToken *eof = [PKToken EOFToken];     PKToken *tok = nil;     while (eof != (tok = [t nextToken])) {         //NSLog(@"tok: %@", tok);     } 