user32123: I have found a description of version 1.8 of the FCPX XML. It is not globally searchable - only section by section and is not for the latest version.
I have an XML file recently emitted from FCPX and it has a version tag "<fcpxml version="1.9">".

user34011: Apple didn't update all the documentation. Found it only here: Link

32123: <p>I have found a <a href="https://developer.apple.com/library/archive/documentation/FinalCutProX/Reference/FinalCutProXXMLFormat/EventsandProjects/EventsandProjects.html#//apple_ref/doc/uid/TP40011227-CH12-SW14" rel="nofollow noreferrer">description</a> of version 1.8 of the FCPX XML. It is not globally searchable - only section by section and is not for the latest version.</p>
<p>I have an XML file recently emitted from FCPX and it has a version tag &quot;&lt;fcpxml version=&quot;1.9&quot;&gt;&quot;.</p>
 34011: <p>Apple didn't update all the documentation. Found it only here: <a href="https://developer.apple.com/documentation/professional_video_applications/fcpxml_reference/document_type_definition?changes=la__1" rel="nofollow noreferrer">Link</a></p>
