How to merge a mkv file?

[kcynice]

As a c programmer, i am dealing with merging *.mkv files from other media fomat, transport stream(*.ts,*.m2ts). Although i can get the source code of mkvtoolnix from matroska.org, i still haven't understand how to merge a *.mkv file. I know the mkv file format clearly, but i am puzzled about the rules to comprise a complete mkv file, no matter the source format. and are there any more documents about merging *.mkv file except matroska.org?
anyone give me some information i will be ecstatic, thanks