HydraExpress evolved from a previous Rogue Wave product, LEIF. LEIF itself was a combination of three separate products, Bobcat, XML Object Link, and SOAPworX. At this point, HydraExpress is a single product and these previous product divisions no longer have much meaning.
If you are migrating to HydraExpress from a previous product, it may be useful to know how these products are incorporated as components into HydraExpress. The following table provides a mapping between previous product names or directories, and the existing installation directory structure.
| HydraExpress | LEIF | Description |
| \include\rwsf\webservice | rw\leif\soapworx | Web service header files |
| \include\rwsf\xmlbinding | rw\leif\xmlol | XML binding header files |
| \include\rwsf\servlet | rw\leif\servlet | Servlet API header files |
| \examples | \examples | Shipped examples |
| \apps\servlets | \webapps | Deployed Web services and servlets |
| \conf\webservice | \conf\soapworx | Web service transport configuration files. Copied to codegendir\conf directory at code generation. |
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