In this day and age, we are already used to seeing and bumping onto different web services at home, shcool, office or anywhere a computer with internet exists. So what is a web service, anyway? It is a technology based on XML, making it easy to allow applications that bring forth to easy communication with others. This becomes possible through the use of exchanged messages that are formatted in standard XML through the use of web interfaces, such as SOAP and WSDL APIs.