The UDDI and ebXML specifications would be the starting points, since those constitute the "public API" of a WS registry. How you implement it is up to you, as long as it adheres to one of those (or both) protocols. The UDDI4j, jUDDI and Apache Scout projects may be of interest to you.
Note that WS registries never really caught on widely, which is why the public registries that used to exist closed shop.
posted 10 years ago
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