Sony PlayStation Portable Moderation Guide
From Redump Wiki
Versions
When two different numbered versions of a given disc exist, both entries get the version number placed into the datname. This also applies to v1.00 discs.
Internal Serial
Internal Serials for all Sony systems are a standardized format in redump: [T:ISN] XXXX-##### (example: [T:ISN] ULUS-12345)
Ringcodes
For Japan UMDs, virtually all of them have a mould SID that is a bit difficult to read, starting with 45Q then a 4th digit. It often looks like "450" or "45O" but it is in fact "45Q." So the data side mould SID should be something like 45Q4 instead of 4504 / 45O4.