Dear Charles, It is very cool grasping how to use sed in however a primitive way. But on further investigation it seems one needs it for a LyX friendly use of ``writer2latex'' only if the document has tables, math, images ... or French. With a fairly wide but unscientifically chosen variety of English documents, I found that the desiderata of: (a) retaining crucial formatting that an English language Word or OpenOffice or docs.google user would likely employ and: (b) avoiding a demoralizing film of ERT by messing with the preferences in writer2latex.xml.
The accursed red {}- is what remains, though the obvious expedient of a find and replace in the latex file before importing into LyX is clearly the way to go if that's all there is. I think it has to do with the ucs.sty that is used in connection with the choice of utf8 among the 'inputencoding' options. But this is way over my head. I don't know how far this depends on how various things are adjusted on the (mac )computer I was using - doc->odt->latex->lyx involves a lot of adjustments - but for the heck of it I will list the alterations from the defaults that seemed to maximize what is preserved subject to the principle of ERT avoidance: <option name="inputencoding" value="utf8" /> <option name="multilingual" value="false" /> in place of <option name="inputencoding" value="ascii" /> <option name="multilingual" value="true" /> <option name="formatting" value="ignore_most" /> <option name="page_formatting" value="ignore_all" /> <option name="ignore_hard_page_breaks" value="true" /> <option name="ignore_hard_line_breaks" value="true" /> <option name="ignore_empty_paragraphs" value="true" /> <option name="ignore_double_spaces" value="true" /> in place of <option name="formatting" value="convert_basic" /> <option name="page_formatting" value="convert_all" /> <option name="ignore_hard_page_breaks" value="false" /> <option name="ignore_hard_line_breaks" value="false" /> <option name="ignore_empty_paragraphs" value="false" /> <option name="ignore_double_spaces" value="false" /> These choices keep the amount of junk in the preamble to a minimum too. The more I fiddle with it the sounder writer2latex seems to be; I wouldn't have thought it was possible. Again, this is all over my head, though now primitive text-altering script-composition isn't, to my amazement - so, or rather, {}- so, thanks, Michael