.SEAM File Extension

File used by Java Web applications supported by the JBoss Seam Framework; stores a reference to a backend servlet, which processes requests to the Web application; used for serving pages to the user through a Web browser; often used with the JavaServer Facelets technology.

While the ".seam" extension is seen in Web browser URLs, it generally does not refer to an actual file on the file system. Instead, it usually is a placeholder for mapping URLs to backend servlets. The web.xml file of a Java Web application usually contains this mapping rule:

<servlet-mapping>
  <servlet-name>My Servlet</servlet-name>
  <url-pattern>*.seam</url-pattern>
</servlet-mapping>