Special characters in XML attributes with NSXMLParser
<el attr="test.

another test." />

NSData *xmlData = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"url://"]];
NSMutableString *myXmlStr = [[NSMutableString alloc] initWithData:xmlData encoding:NSUTF8StringEncoding];
NSRange range = [myXmlStr rangeOfString:@"n"];
[myXmlStr replaceCharactersInRange:range withString:@"[:newline:]"];
NSData *newXmlData = [myXmlStr dataUsingEncoding:NSUTF8StringEncoding];