What are the codes of translations?

jPALIO translations module operates on codes. These are the tags they use developers creating the portal. On the collection of information on the translation consists: code, category and translation in the language (eg .: "QuickStart" / "jpalio.cms.category" / "Quick Start"). A developer writing an application will only use codes and categories, jPALIO take care to change it for translate  understandable to the user. Category translation is used to distinguish different versions of the same code. In one place, for example, the code "zapiszPlik" can be translated to "Save file to disk" and another on "Save". To distinguish the two versions, one of them can be assigned, for example, the category "upload" and the second "commonWords".