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this should go somewhere on the wiki

We should treat NUL as hard separators – if we don't, apertium-apy (and thus will risk sending output meant for person1 to person2. (I have an inkling there might still be bugs in apertium-transfer related to this.)

This also means we should be able to treat NUL's as "record separators" when e.g. translating a corpus of individual sentences, where we don't want one sentence to affect the translation of the next sentence.

If we at least handle NUL's correctly in lt-proc and cg-proc, you can append NUL's after linebreaks (first deleting any existing NUL's in the corpus) and tag with the -z option to lt-/cg-proc:

   cat corpus.txt                     \
   | tr -d '\0'                       \
   | apertium-deshtml -n              \
   | sed 's/\[$/[][/; s/^]/]\x00/'    \
   | lt-proc -z -w 'tat.automorf.bin' \
   | cg-proc -z -w -1 'tat.rlx.bin'   \
   | tr -d '\0'                       \
   | apertium-rehtml-noent

… finally deleting the NUL's. (Note that NUL's have to appear after the string "[][\n]" for tools like lt-proc to handle them correctly.)

similarly for full pipelines

(unfortunately, /usr/bin/apertium can't add the -z's for you, you'll have to grab the pipeline from modes/foo-bar.mode and insert -z's yourself)