WSDL (Web Services Description Lenguage): this component acts as a contract, therefore it lists the functionalities and at the same time it says as to request them, its main purpose and to describe at great length a Web Services and to effect the exchange of messages, and specifically responsible for providing the information necessary to invoke Web Service.? SOAP (Simple Object Access Protocol): it is a protocol of communication for the Web Services, an archive XML formed together with elements SAOP well proposal for the WC3 and follows the model ' ' REQUEST RESPONSE' ' of the HTTP they can have its call of applications inside customer or server. Its main purpose and the exchange of information in distributed systems, also based in XML being used to have access Web Services.? CLIENT or Customer: this can be a software requesting the Web Service or even though a person having access a service through a page web or to browser carrying through a solicitation to the one methods determined Web Service.? PROVIDER or Supplier of Web Services: it corresponds to a server of application or server web that he meets housed the Web Service allowing that customers have access the service. In this article, we will have a general vision of the Web Services and protocol SOAP its structure and communication with Web Services will approach an use in the real world. Valley imposes a fine on to stand out that in it practises the functioning of the Web Services does not occur in maiorias of the cases as specified for the W3C (World Web Consortium, International trust with about 300 members, and independent companies, governmental bodies that it aims at to develop standards for the creation and interpretation of content for web). WSDL is a protocol based on XML for exchange of information in environment distributed registered way UDDI, a standard to describe as to have access a service web and which operation to execute, is used in combination with SOAP and XML to give to services web through the Internet, a service web reads archive WSDL to determine the available functions.