All research based on data00_eng.bin

The files themselves are containers.

All offset and length values are in Big Endian format.

Structure

The files are divided into 3 sections, Header, Blocks and Sections.

Header is the basic file structure info found at the start.

Sections are large chunks of data that contain blocks, Item Strings, Blademaster Strings, Gunner Strings, etc.

Blocks are the different partitions of each section, for example, the Blademaster Strings section contains 2 blocks for each weapon class, one for names and one for strings.

All offsets found inside blocks expect the section to start at 0x00.

Header Definition

Byte	Length	Description
0x00	0x04	Magic (OMOM/0x4F4D4F4D)
0x04	0x04	Number of files

Section Definition

These work with global offsets.

Byte	Length	Description
0x00	0x04	Offset to Section
0x04	0x04	Size of Section
...	...	Repeat for Number of Files

Block Definition

Unfortunately, there doesn't seem to be a simple way to programatically get the number of blocks per section.

Byte	Length	Description
0x00	0x04	Offset to block strings's offsets
0x04	0x04	Number of strings for this block
...	...	Repeat for Number of Blocks