JavaCard OS

Has anybody worked with the jcf file format for java card ?
If you know this, can you recommend a document describing javacard jcf file format to me ?
I would appreciate it.

As far as I know, jcf and bin (ijc) file formats seems identical except that jcf as a header who gives the length of the data , the rest are the concatenation of the cap components.

The structure of jcf is just as :
0xC4 0x82 0xLL 0xLL DATA

-0xC482 is the data tag.
-0xLLLL is the length of data.
-DATA is the concatenation of the cap components.