how can I get all the udeb source packages list?

[Qin Bo <kinboster@gmail.com>]

hi all:
   I want to build all the udeb packages, but I couldn't confirm the udeb source packages list and udeb packages list which use by debian installer.
   How can I get  all the udeb source packages list?
   As far as I know now:
  
different architecture the source package may is different like bootloader of ia64 and x86 is different etc. 
  
and some source packages is not  get from debian installer's svn like xfsprogs-udeb is build by xfsporgs etc.
   Is that any documentation mention the debian installer's udeb packages lists and corresponding it packages source list?

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Best Regards,
Qin Bo