% pandoc -f latex -t native
\subfile{command/sub-file-chapter-1}
\subfile{command/sub-file-chapter-2}
^D
[Header 1 ("chapter-1",[],[]) [Str "Chapter",Space,Str "1"]
,Para [Str "This",Space,Str "is",Space,Str "Chapter",Space,Str "1,",Space,Str "provided",Space,Str "in",Space,Str "a",Space,Str "sub",Space,Str "file."]
,Header 1 ("chapter-2",[],[]) [Str "Chapter",Space,Str "2"]
,Para [Str "This",Space,Str "is",Space,Str "Chapter",Space,Str "2,",Space,Str "provided",Space,Str "in",Space,Str "a",Space,Str "second",Space,Str "sub",Space,Str "file."]]

% pandoc -flatex+raw_tex -t native
\subfile{command/sub-file-chapter-1}
\subfile{command/sub-file-chapter-2}
^D
[Header 1 ("chapter-1",[],[]) [Str "Chapter",Space,Str "1"]
,Para [Str "This",Space,Str "is",Space,Str "Chapter",Space,Str "1,",Space,Str "provided",Space,Str "in",Space,Str "a",Space,Str "sub",Space,Str "file."]
,Header 1 ("chapter-2",[],[]) [Str "Chapter",Space,Str "2"]
,Para [Str "This",Space,Str "is",Space,Str "Chapter",Space,Str "2,",Space,Str "provided",Space,Str "in",Space,Str "a",Space,Str "second",Space,Str "sub",Space,Str "file."]]