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<H1><nop>IVOA Grid & Web Services: Web service interoperability</H1>

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---++ Overview
Web services are supposed to be capable of interoperating, i.e. the same client can call different instances of a particular service or one service can another service, without any difficulty. Unfortunately, it turns out that this is not the case, which is why the Web Services Interoperability (WS-I) Organisation was formed to provide a set of guidelines (called _profiles_) on how to be interoperable. The minimum requirements are defined in the WS-I Basic Profile.

---++ VO Web Services Basic Profile Proposal
The sections of WS-I Basic Profile that are relevant for the IVOA have been specified in the VO Web Service Basic Profile proposal. This document describes rules to take into account when implementing (SOAP-based) web services. It also explains how to check the conformance to these rules.

---+++ Specification
The latest version of the VO Web Services Basic Profile is v0.25:

   * [[http://wiki.ivoa.net/internal/IVOA/IvoaGridAndWebServices/VO-WS-Basic-Profile-0.25.pdf][VO-WS-Basic-Profile-0.25]]

---+++ Discussion

   * [[WSIDiscussion][Discussion page for specification]]

---+++ Tools
Tools that are relevant for WS-I:

   * [[http://cdsws.u-strasbg.fr/ivoa/servlet/IVOAWSBasicProfileChecker][Prototype online checking tool]]

---+++ History

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This topic: IVOA > WebHome > IvoaGridAndWebServices > WSIHome
Topic revision: r2 - 2008-05-08 - MatthewGraham