An XML format for describing network services as a set of endpoints operating on messages containing either document- oriented or procedure-oriented information. WSDL complements the UDDI standard by providing a uniform way of describing the abstract interface and protocol bindings and deployment details of arbitrary network services.
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                                                                    NIST SP 800-95
                                                                
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                                                                            Web Services Description Language (WSDL) 1.1,                                                                             Oregon Statewide Automated Child Welfare Information System (SACWIS) Glossary