Yes, I am closing now.

Ah, you are right, there is built-in Subtitle style. I've fixed that.

And now I've added the subtitle support. I've found that it doesn't work correctly even in HTML, so I fixed that as well.

I've just fixed the abstract issues in TeX4ht sources.

#529, for that matter.

BTW trying to recompile the tex test case here exposes another problem:

juergen@linux-9zah:~/test/tex4ht> make4ht -f odt scrartcl-test
[STATUS]  make4ht: Conversion started
[STATUS]  make4ht: Input file: scrartcl-test
[ERROR]   htlatex: Compilation errors in the htlatex run
[ERROR]   htlatex: Filename	Line	Message
[ERROR]   htlatex: ./scrartcl-test.tex 	15	 Class scrartcl Error: undefined old font command `\tt'.

Note that \tt is not used anywhere in the file itself (and the file compiles without error with pdflatex) so it must be used by a file included by tex4ht.

Hi again

I found two issues when compiling a scrartcl document to ODT:

1. The subtitle is not output
2. the abstract is output as Standard paragraph rather than "abstract"

The latter is probably due to KOMA not having an abstract heading by default. When using the class option abstract=true (which switches on the heading) the abstract is output correctly.

MWE with ODT output attached.