# Package info The package_key is most trickiest part of this command: You must prepend a main language of the library just before product's id. It's required to prevent ambiguity between packages with same name. For example, if you have Java package with product id **junit/junit**, then you have to encode this value as: `java/junit/junit`. ``` $> veye info java/junit/junit Asking information about: junit/junit ``` ![Pretty print](http://dl.dropbox.com/u/19578784/versioneye/info_pretty.png)