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[aprssig] New MSG-OBJ format (rev b)

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Wed Feb 22 20:00:58 UTC 2012


To make it optional, it must be enclosed in brackets [] as you 
originally proposed because otherwise a 2 character word at the 
beginning of the comment would look like an overlayed symbol.

Inclusive of the [], that gives 4 characters for the second word for a 
table/symbol specification, but if we want to allow a shorter 
specification for the primary table, the / can be eliminated giving a 3 
character second word.  This would mean that [/b] and [b] would both be 
a motorcycle, but the latter has one fewer special characters to be typed.

You are correct that a symbol spec always has 2 characters, a table or 
overlay and a symbol within that table.  The 3 character proposal 
(including the brackets) was a short-cut for primary table symbols.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 2/22/2012 12:44 PM, Bob Bruninga wrote:
>> If you want,  you could also support a 3 character word,
>> but still to be a symbol, the first and last characters
>> must be [ and ].  A 3 character word/symbol is in the primary table, IMHO.
> Help me here.  All symbols can be indicated with two bytes.  Did I miss
> something?
>
> Thanks
> Bob, WB4APR
>
>
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