查了一个外文文档

/binding.ejb/@uri – optional attribute that specifies the URI of a session bean endpoint.
For EJB 2.x, this is the endpoint of the session home. For interoperability the form of the URI
is defined by CORBA in the CORBA Services specification [2], and is a standard URI form for
referring to remotable CORBA objects. Briefly, the corbaname URI format looks like this:
corbaname:iiop:<hostName>:<port>/<key string>#<path to home>
Typically, a corbaname URI doesn’t include all these components. The following example
shows a corbaname URI that uses the default ORB configuration to find an EJB home at
ejb/MyHome in the JNDI directory:
corbaname:rir:#ejb/MyHome
Other forms of URI specification are admissible when interoperability is of no concern.

上面说了这两种方法（蓝色字体）

这个是 Consuming an Existing EJB SOA Service 的例子

<reference name="CandidateCheck">
   <interface.java interface="com.app.jobbank.CandidateChk"/>
   <binding.ejb uri="corbaname:rir:#ejb/CandidateChkHome"/>
</reference >

用的是上面的第二种方法。

对于第一种方法，不太明白那个<key string>和<path to home>的具体填写规则。

对于第二种方法，不明白如果不写ip地址的话，怎么来找到外部的EJB。

请高手帮忙指点一下。