I need ideas on how to read this file
I want to read a flat file with the following info:
There are about 30,000 Terms. Most terms are linked with others and all of them have an id which has this format: GO:number, i.e: GO:0006310.
For every term I need to get:
-the is_a id.
- the relationship id
name: regulation of mitotic recombination
def: "Any process that modulates the frequency, rate or extent of DNA recombination during mitosis." [GOC:go_curators]
synonym: "regulation of recombination within rDNA repeats" NARROW 
is_a: GO:0000018 ! regulation of DNA recombination
relationship: regulates GO:0006312 ! mitotic recombination
GO:0000019, GO:0000018, GO:0006312.
Finally I must ignore them when "is_obsolete: true" is present. (The Term is not relevant and I don't need it's info)
I don't need any java code (although any suggestion is greatly appreciated), but I need a way to get this done. My final goal is to make a matrix with the Term's id in the first column, and the rest of the ids found, in the following columns. Any idea on how to do this?
P.S: Please forgive me if this is not the right forum. Feel free to move it.