iPhone: How do I "cancel" my xmlparser from parsing in objective c?
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In my 

    - (void)parser:(NSXMLParser *)parser
            didStartElement:(NSString *)elementName
               namespaceURI:(NSString *)namespaceURI
              qualifiedName:(NSString *)qualifiedName
                 attributes:(NSDictionary *)attributeDict {
              // ...
    }

I check to see if one of my XML attributes is equal to a value I store in my plist. If it's not then I want it to execute normally and get the latest information. If it is the same value though I don't want to waste the processing time of getting all the data again.  So if I have code like below how can I terminate the parsing process if the values are the same? 

    if (lastUpdated == [attributeDict valueForKey:@"last_updated"]) {
         // Terminate the xml parsing because data is up to date
    }