I have written a web service and generated a WSDL for it(using JDeveloper). I just want to practise publishing it to any UDDI registry and finding it through the UDDI registry GUI / programmatically. I see that most of the public UDDI registries seem to be closed like UBR, Systinet live etc. Could someone give me the link to some working public UDDI registry that has instructions to register, publish and find WSDL based web services?
I'm not aware of any public registries. Like you said, the ones that existed were closed a while ago, since general interest in UDDI has waned. There are open source projects called jUDDI and UDDI4J that you can use to run a registry yourself.