Empty headline titles unsupported: Bug?

[Sebastian Miele]

Hello,

worg/dev/org-syntax.org is not clear about whether the title of a
headline is allowed to be empty.  I occasionally (would like to) use
headlines with empty titles, e.g., when a tag in some headline already
provides all necessary information, and an additional title would
duplicate that.

Are empty headline titles meant to be supported?  If yes, then there are
at least two bugs.  On

#+BEGIN_EXAMPLE
,* A
,* :B:
,* C
#+END_EXAMPLE

org-element-parse-buffer and org-match-sparse-tree make the second
headline have title ":B:" and no tags.

Best wishes
Sebastian