This is a follow up to bug 130133. Now the for ODF 1.2 invalid trend lines of type 'polynomial' and 'moving average' are no longer written in case of 'ODF 1.2 extended'. But the note in the release notes is missing.
Moving average properties are written in loext namespace in case of save to "ODF 1.2 extended" in Version: 7.0.0.0.alpha1+ (x64) Build ID: 0e5e935deb0527c64865cfcc53a0421e56b74b6f CPU threads: 8; OS: Windows 10.0 Build 18362; UI render: Skia/Raster; VCL: win Locale: de-DE (en_US); UI: en-US Calc: CL That is correct in principle. But neither LO 6.4.3 nor LO 7.0 can read it.
@Michael: Please comment, what to do about these useless loext:regression-* attributes in case of saving in "ODF 1.2 extended".
for ODF 1.2 extended the loext attributes are written but the new attribute values for the type are not written, so the loext attributes are indeed useless. but avoiding the writing of the loext attributes got a bit more difficult now since this: For developers who want to add new ODF extensions, we would like to point out the behavioral change in commit f1dbaac9e4b68941d845a5f0ab7b204e12de14de "xmloff: ODF export: rework version checks in SvXMLExportPropertyMapper" (see commit message) that should simplify things a little bit. ... so given that ODF 1.2 extended versions aren't the default i'd like to leave this as it is for simplicity because the loext attributes don't hurt anyone.
fixed: https://wiki.documentfoundation.org/index.php?title=ReleaseNotes%2F7.0&type=revision&diff=268766&oldid=268765
Visited https://wiki.documentfoundation.org/index.php?title=ReleaseNotes%2F7.0 on 2020-06-03 and see correct text in section "ODF 1.3".