Plug-ins and plug-in fragments are individually packaged as separate Java
.jars. Standard Java jar facilities are used for constructing plug-in archives.
There is no distinction made between a plug-in archive containing a plug-in
and one containing a plug-in fragment.
The recommended convention for naming the plug-in archives is
Where <id> is the plug-in or fragment identifier and <version>
is the full version identifier contained in the respective plugin.xml or
fragment.xml. Note that this is a recommended convention that minimizes
chance of collisions, but is not required by the Eclipse architecture.
For example, the following are valid plug-in archive names:
Internally, each plug-in archive packages all the relevant plug-in or
fragment files relative to its plug-in or fragment directory (but not including
the directory path element). The archive has the following structure
plugin.xml *OR* fragment.xml
other plug-in or fragment files and subdirectories
Java jar manifest and security files