Use case I have a data analysis service: ivo://nvo.caltech/MyService Upload bytes of a VM image: xri://@!the.sky/MyService/(+object) Create service instance: HTTP POST to http://@!the.sky/MyService/(+instance)http://@!the.sky/MyService/(+instance Returns xri://@!the.sky/MyService/1234 Commit instance to execution: HTTP POST to http://@!the.sky/MyService/1234/(+instance)/quotehttp://@!the.sky/MyService/1234/(+instance)/quote Define computation: xri://@!the.sky/MyService/1234+ data@xri://@!the.sky/MyData/myTable1+ params@xri://@!the.sky/MyData/myParam1 Link to results: xri://@!the.sky/MyData/myResults1 Retrieve bytes: xri://@!the.sky/MyData/myResults1/(+object) 20 May 2008IVOA Trieste: Grid & Web Services/AstroRG8