WebCenter Content is a SOA-based application. Actions (such as checkin, checkout, search, etc.) can be triggered by calling services. This blog post lists some example SOAP requests and related information.
Over the past few months, Oracle has migrated to a new blog platform. This migration caused 80+ links, from my blog to Oracle blogs, to break. I have combed through all the broken links and updated them. Some blogs (such as Kyle Hatlestad’s) have been completed removed. Fortunately, Internet Archive Wayback Machine, has copies which I have linked to.