2.3.4 xml files cannot be opened by 2.2.x anymore (?) (Re: Db structure)

[Derek Atkins]

Phil,

IMHO 2.3/2.4 should not write anything new into the pure XML areas.
However, you can teach it to /read/ any new tags you want.  Then in
2.5/2.6/3.0 we can have it write those new tags.

In terms of reading unknown tags, I think it's fine to teach 2.3/2.4 to
read unknown tags but where do you put them.  I dont think there's
necessarily a 1:1 mapping of KVP<->tag.  I don't think you can safely
say all new tags would be in the same KVP frame, can you?  Some might
come from different KVP sub-trees.

-derek

Phil Longstaff <plongstaff at rogers.com> writes:

> I think I was moving too quickly and didn't stop to really read what you
> wrote.  I went on what I thought you said. I'll go back and re-read what you
> wrote.
>
> Rather than reading those specific tags, how about, for any object, unknown
> tags are read as slots.  The values could either always be stored as strings,
> or some intelligence could be used (numeric values stored as int or double,
> "F", "T", "true", "false" stored as boolean, string of 32 hex chars stored as
> guid).
>
> Phil
>
> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
> From: Derek Atkins <warlord at MIT.EDU>
> To: Christian Stimming <stimming at tuhh.de>
> Cc: gnucash-devel <gnucash-devel at lists.gnucash.org>
> Sent: Friday, August 21, 2009 11:51:41 AM
> Subject: Re: 2.3.4 xml files cannot be opened by 2.2.x anymore (?) (Re: Db
> structure)
>
> Christian Stimming <stimming at tuhh.de> writes:
>
>> The use case for loading a 2.3 or 2.4 file into 2.2 again is rather
>> common: Someone runs the new version for testing and in order to do
>> thorough testing he uses his live data, but then for whatever reason
>> doesn't like the current state of the new version and prefers to
>> continue his daily work in the previous version.
>>
>> Does anyone see the same issues? How are we going to deal with this?
>
> IMHO we should leaving in the reading of these new tags but turn off the
> 'writing' of these tags in 2.3/2.4...  Which is what I suggested but
> Phil ignored me.
>
>> Regards,
>>
>> Christian
>
> -derek
>
> --
>       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
>       Member, MIT Student Information Processing Board  (SIPB)
>       URL: http://web.mit.edu/warlord/    PP-ASEL-IA    N1NWH
>       warlord at MIT.EDU                        PGP key available
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>

-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord at MIT.EDU                        PGP key available