title: How can I test if a jar is an OSGi jar?
body: <p>Maybe it is a silly question, but what is the best way to test if a Java Archive (jar) file is an OSGi bundle? That is, what are the minimal requirements for the jar to be fully compatible? Is it the mere presence of a META-INF/MANIFEST.MF (I don't think so)? If not, what are the minimal fields that must be provided by this file?</p>
  
  <p>Practically, how should I test if the jar is an OSGi jar?</p>