what are the encoding technique used in bitmaps indexes

hi all,

i have a doubt in encoding techniques used in bitmaps index...
what are the encoding techniques and how is it used in bitmaps index??

please help me out

would you define "encoding techniques" in this context?

If you are looking for what's different in between btree and bitmap indexes you may want to start here... http://www.oracle.com/technology/pub...a_indexes.html