The difference between JSR and Mr

The two words, such as the JSR and Mr, are often seen in the Java EE specification, such as 7 with 14 JSRs and 9 MRs.

So what's the difference between what's called jsr,mr them.

The JSR is the abbreviation for Java specification requests, which means the Java specification proposal. is a formal request to JCP (Java Community Process) to propose a new standardized technical specification.

Any specification starts with a JSR.  And there is a unique number, such as JSR303. JSR different time periods, with different states. Like what:

"Early Draft Review", "Public Final Draft" and "final Release".

What is MR,MR is the abbreviation of maintenance release. means to maintain the version. Refers to an upgraded version based on a JSR.

Like what:

The Servlet 3.1 specification is JSR 340.

The Servlet 3.0 specification is JSR 315.

Servlet 2.5 is maintenance release of Servlet 2.4. Both JSR 154. The upgraded JSR is the same as the original version of the JSR number.

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The difference between JSR and Mr