vndb_XXXXXX
VNDB producer id.
egs_XXXXXX
ErogameScape producer id.
eXXXXXX
ErogameScape product id.
rXXXXXX
VNDB release id. Used for releases with multiple novels.
__MISSING__
Some extras might be available, but not the novel itself.
__COLLECTION_rXXXXXX__
Novel available as collection release.
__PC-98__
Novel available as PC-98 release.