On Monday,  9 Jan 2017 at 15:46, John Kitchin wrote:
> Based on the docstrings for org-export-select-tags and
> org-export-exclude-tags, this looks expected.
>
> It does not look possible to exclude a heading and include a subheading
> under it. It is possible to include a heading and exclude some
> subheadings though you need a wanted tag in the parent, and notwanted
> tags in the subtrees, and to declare the exclude tags.

I think I was unclear.  My confusion is that a tree (rooted at a top
level headline) that I do not want exported is nevertheless exported if
a subtree within that tree has a "selected" tag.  I would have thought
the higher level heading would take precedence.

> I am surprised you can use comment like this. It looks to me like
> commenting a tree makes all the subtrees in it not export too.

Yes, it is.  Again, I obviously didn't explain myself well.  I have
resorted to commenting out whole trees (rooted at headlines) to avoid
them being exported because a sub-tree has the selected tag.

In any case, I have found a workaround by inverting my tag usage.

thanks,
eric

-- 
: Eric S Fraga (0xFFFCF67D), Emacs 26.0.50.1, Org release_9.0.3-189-ge46676