"Type" denotes type whether Samsung based or CM based etc .
"Base" denotes firmware base of the ROM.
"Version" denotes custom ROM version as & if provided by the ROM developer.
"OP" is the XDA alias of ROM developer.
"Link" gives you direct access to respective ROM thread.
"Days since last Update", as the title denotes tell you about the ageing of current ROM version, from the date of its release. i.e. More the number of days, older it is. Less than 10 days old ROMs are highlighted in "Green" & More than 60 days old ROMs are highlighted in "Red"
Please check the ROM Repository by clicking on the link below:
ROM REPOSITORY FOR NOTE 2 - N7100
More about Note 2 AOSP ROMs features Thank @UtkarshGupta