An <object> tag exist in help files XHP DTD, that allows to include objects with specific mimetypes in the help content.
<object data="clock.svg" id="objClock" type="image/svg+xml" width="200" height="200">
The Help Authoring tool does not support this tag, and the tag is erased on saving the file.
The task is to let helpauthoring tool read and save <object> tag *without touching* its content (i.e. be transparent).
At best, also implement visual indication of the <object> in the document opened in HA extension thru a Frame or OLE object. If there is a 1:1 mapping of <object> and ODT OLE objects, then even better to display it (not checked).
Note: the <object> tag is *not* implemented into the help content because the Writer/Web rendering engine is outdated and the XSLT transformation main_transform.xsl does not transform this tag. But new rendering engines such as browsers can implement a wider set of object types.
Helpauthoring extension is deprecated. closing wontfix.