[liblouis-liblouisxml] Re: Question about english computer braille tables
- From: "John J. Boyer" <john.boyer@xxxxxxxxxxxxxxxxx>
- To: liblouis-liblouisxml@xxxxxxxxxxxxx
- Date: Fri, 17 Feb 2012 08:21:42 -0600
Hi Yuemei,
The tables are ok. The comp6 opcode overrides uplow, so en-us-comp6.ctb
will produce the dot pattern 456-1 for uppercase a.
John
On Thu, Feb 16, 2012 at 10:22:49AM -0800, Yuemei Sun wrote:
> Hi, John,
>
> Thank you for the explanation. For the en-us-comp6.ctb, there are two
> places that mention the A, one is "uplow Aa 17,1", the other is "comp6 A
> 456-1". The "uplow Aa" is not defined as "456-1,1"as you mentioned. Is
> the table in SVN repository for en-us-comp6.ctb not updated?
>
> Thanks,
> Yuemei
>
> On 2/14/2012 2:09 PM, John J. Boyer wrote:
> >I decided to check this out. Hopefully others will have comments also.
> >The general question is which tables are for computer braille. There may
> >be different computer braille tables for different languages. Some of
> >the g0 tables seem to be for computer braille.
> >
> >Of the U.S. English tables, en-us-compbrl.ctb should probably be
> >ignored. en-us-comp8.ctb contains 8-dot computer braille. Uppercase
> >letters have dot 7 added to the dots for the lowercase letters. In U.S.
> >English computer braille uppercase letters require two cells. They are
> >preceded by dots 456. Thus in en-us-comp6.ctb we have the entry
> >
> >uplow Aa 456-1,1
> >
> >John
> >
> >
> >
> >On Tue, Feb 14, 2012 at 10:33:00AM -0800, Yuemei Sun wrote:
> >>Can anybody explain the use of the three American English braille
> >>tables, en-us-comp6.ctb, en-us-comp8.ctb, and en-us-compbrl.ctb? I
> >>looked at the table, it looks to me that only the en-us-comp6.ctb has
> >>entries defining 8 dot compuer braille for upper case letters. The same
> >>table also has "comp6 A 456-1" entry. In this case, what will upper
> >>case A be translated into, one cell with dot patter 17, or two cells
> >>with pattern "456-1"? In other words, what table should I use if I want
> >>6-dot US computer braille, and what table is for 8-dot US computer
> >>braille?
> >>
> >>Thanks,
> >>
> >>--
> >>Yuemei Sun
> >>
> >>Software Engineer
> >>yuemei.sun@xxxxxxxxxxxx
> >>541-754-4002 ext 229
> >>
> >>For a description of the software, to download it and links to
> >>project pages go to http://www.abilitiessoft.com
>
> --
> Yuemei Sun
>
> Software Engineer
> yuemei.sun@xxxxxxxxxxxx
> 541-754-4002 ext 229
>
> For a description of the software, to download it and links to
> project pages go to http://www.abilitiessoft.com
--
John J. Boyer; President, Chief Software Developer
Abilitiessoft, Inc.
http://www.abilitiessoft.com
Madison, Wisconsin USA
Developing software for people with disabilities
For a description of the software, to download it and links to
project pages go to http://www.abilitiessoft.com
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