\overline and \overbar

10 May 2017

      Dear all,

In the following sample, the outputs of \overline and of \overbar are slightly different.
I used \overline in LaTeX. 
But  it takes more vertical space that cause the alignment trouble while using \overbar has no problem at all.
Is it normal behavior? 

Thank you.

Best regards,

Dalyoung

%%%%%%%%
\starttext
\startitemize[n]
\item Which is true?

	\startitemize[n, packed, columns, two][stopper=,left=(, right=)]
	\item $\overline{A} = A \cup A^\circ$
	\item $\overline{A\cup B} = \overline{A} \cup \overline{B}$
	\item If $A \subset B$ then $\overline{B} \subset \overline{A}$
	\item $A\cup A'$ is an open set.
	\stopitemize

\item Which is true?

	\startitemize[n, packed, columns, two][stopper=,left=(, right=)]
	\item $\overbar{A} = A \cup A^\circ$
	\item If $A \subset B$ then $\overbar{B} \subset \overbar{A}$
	\item $\overbar{A\cup B} = \overbar{A} \cup \overbar{B}$
	\item $A\cup A'$ is an open set.
	\stopitemize

\stopitemize

\stoptext
...
2017. 5. 9. 오후 7:00, ntg-context-request@ntg.nl 작성:
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Today's Topics:
1. Re: BUG: % is comment in btx fields (Henri Menke)
  2. Re: BUG: % is comment in btx fields (Rik Kabel)
  3. Re: BUG: % is comment in btx fields (Ulrike Fischer)
----------------------------------------------------------------------
Message: 1
Date: Tue, 09 May 2017 13:40:55 +1200
From: Henri Menke 
To: ntg-context@ntg.nl
Subject: Re: [NTG-context] BUG: % is comment in btx fields
Message-ID: <1494294055.19890.36.camel@gmail.com>
Content-Type: text/plain; charset="UTF-8"
On Mon, 2017-05-08 at 20:15 -0400, Rik Kabel wrote:
...
On 2017-05-08 17:44, Henri Menke wrote:
...
Dear list,
The percent character in btx field is taken as a comment characters
which leads to the rest of the field being discarded.  In the MWE
below, the URL is cut off at the % sign and everything after it is
lost.
Cheers, Henri
---
\startbuffer[references]
@misc{kraft,
  author = "Kraft, Nathan",
  title = "Mr Kraft's Virtual Filing Cabinet",
  year = "2015",
  url = "http://mrkraft.wikispaces.com/Mr+Kraft%27s+Virtual+Filing+
Cabi
net"
}
\stopbuffer
\usebtxdataset[references.buffer]
\usebtxdefinitions[apa]
\starttext
\nocite[kraft]
\placelistofpublications
\stoptext
 The bibtex entry in this example is provided in a buffer. The buffer
mechanism does not handle characters any differently than other text
in the file, and % in a ConTeXt buffer has to be escaped if it does
not signify a comment.
That is simply not true!  Content inside ConTeXt buffers is as verbatim
as reading an external file.  Try \typebuffer instead of \getbuffer
your example below and observe that the comment sign is perfectly
preserved.
...
If you specify an external (.bib or .bibtex) file to supply the
data,  % does not need to be escaped. So, this part is simple user
error.
(With
\starttext
\startbuffer
  abc%def
ghi\%jkl
\stopbuffer
\getbuffer
\stoptext
you do not get %def in the output. Why do you expect different
behavior if the buffer holds a bibtex entry?)
The way hyphenatedurl handles things may well be worthy of
improvement.
-- 
Rik
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------------------------------
Message: 2
Date: Mon, 8 May 2017 21:48:58 -0400
From: Rik Kabel 
To: ntg-context@ntg.nl
Subject: Re: [NTG-context] BUG: % is comment in btx fields
Message-ID: <7afe4404-fd96-e7b6-7188-deb8d778ec75@rik.users.panix.com>
Content-Type: text/plain; charset=utf-8; format=flowed
On 2017-05-08 21:40, Henri Menke wrote:
...
That is simply not true!  Content inside ConTeXt buffers is as verbatim
as reading an external file.  Try \typebuffer instead of \getbuffer
your example below and observe that the comment sign is perfectly
preserved.
I am sorry. You are, of course, correct, and I use both, so should know 
better.
-- 
Rik
------------------------------
Message: 3
Date: Tue, 9 May 2017 11:19:46 +0200
From: Ulrike Fischer 
To: ntg-context@ntg.nl
Subject: Re: [NTG-context] BUG: % is comment in btx fields
Message-ID: <19so48cp6cn6u.dlg@nililand.de>
Content-Type: text/plain; charset="us-ascii"
Am Mon, 8 May 2017 17:56:08 -0600 schrieb Alan Braslau:
...
So bibtex has a funny way of dealing with comments, and do we really
care about Scribe?
biber handles comments differently than bibtex, see e.g.
https://tex.stackexchange.com/questions/261261/are-comments-discouraged-in-a...
As a thumbrule one can sum the rule up that *inside* field text
comment chars should be input according the tex rule for the field
*type*. That means that normal textfields should use \%, while url's
and other verbatim-like field can use %.
...
We made the choice NOT to remain *strictly* bibtex
compatible, after all bibtex is limited to ASCII 7-bit!
That's not true bibtex has no real problem with 8-bit-encodings, and
works even quite often quite good with utf8 (when you don't try to
use at places where it can be broken into parts.
-- 
Ulrike Fischer 
http://www.troubleshooting-tex.de/
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Jeong Dal

Henri Menke

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