FSIZ, PRIO, and 1VCD1

Is there any information available about the data constructed by Nero that isn’t part of the file system? For example, we have a disc with the following data:

0000 0E4E6572 6F49534F 302E3032 2E30340A .NeroISO 0.02.04.
0010 00000001 00000000 00104E45 524F2042 … …NERO B
0020 55524E49 4E472052 4F4D0000 00FC2E53 URNING R OM…S
0030 45FC2E53 45FFFFFF FFFFFFFF FF000000 E…SE… …
0040 000C2F53 45010000 00000000 00010000 …/SE… …
0050 00010000 00010000 00000000 000C5049 … …PI
0060 43545552 455F5445 53540C50 69637475 CTURE_TE ST.Pictu
0070 72655F54 65737410 00000036 24750000 re_Test. …6$u…
0080 00000001 000E872B 0404C701 80609360 …+ ….
0090 0404C701 000E872B 0404C701 00000018 …+ …
00a0 025F5F5F 31564344 31060001 00000004 .___1VCD 1…
00b0 00000000 0045444A 4F030001 00000001 …EDJ O…
00c0 000E4653 495A0A00 01000000 08003624 …FSIZ… …6$
00d0 75000000 00005052 494F0A00 02000000 u…PR IO…

This seems like it is some mapping of where the files came from and what they are called on the disc. I am guessing FSIZ has something to do with the original file size as well. Is there any further information about this?