document: Investigating web services on the world wide web Searching for Web service access points is no longer attached to service registries as Web search engines have become a new major source for discovering Web services . In this work , we conduct a thorough analytical investigation on the plurality of Web service interfaces that exist on the Web today . Using our Web Service Crawler Engine ( WSCE ) , we collect metadata service information on retrieved interfaces through accessible UBRs , service portals and search engines . We use this data to determine Web service statistics and distribution based on object sizes , types of technologies employed , and the number of functioning services . This statistical data can be used to help determine the current status of Web services . We determine an intriguing result that 63 % of the available Web services on the Web are considered to be active . We further use our findings to provide insights on improving the service retrieval process .
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