The Web Service Inspection Language specifies a means to allow third parties the ability to discover web services. WS-Inspect is one of the GXA specifications. Although WS-Inspect has significant overlap with UDDI, the two are designed for different purposes.

Differences Between UDDI & WSIL

• WSIL is designed for self-publishing, where UDDI is often implemented through a third-party publisher.
• WSIL implementations are often executed geographically close to the actual service implementation (e.g., same server).
• WSIL is designed to be a lightweight, simple to implement service while UDDI is meant to be a full-featured directory service.
• WSIL is designed for simple interrogation (e.g., crawling service descriptions) while UDDI is designed for more complex queries.

Here is the WS-Inspect specification.