isn't it called iteminfo.lua lub?
wait. this structure..
not thinking so, rA uses a table like on SQL and TXT. try to open excel, import data from text file, select item_db.txt (pre-re, re both are fine) and delimit with a comma (,) then you can see it looks like a table. (it is a table)
If your question is: "Will rA modify the structure to be like this?" then,,, I don't know. you got to ask the developers. Probably, they would ask you "why?" because:
For every entry, you will need to write [ { ], [ <tab> ], [ ID: ] , [ AegisName ], etc right? each character has a size that will be written. it may be small. but, what about if Ragnarok keep developing and add more items? then the item_db.txt will be soooooo large.
This is the current rA's item_db.txt (mine, not sure if updated):
*btw, usually a single <tab> is considered as 4 white spaces. May be read as [4 white spaces] or [\t] accordingly.
conclusion: that structure will take up so many spaces.