[Qgis-developer] About project.qgs file versions

[Geo DrinX]

2016-10-25 11:49 GMT+02:00 DelazJ <delazj at gmail.com>:

> Hi,
>
>
> 2016-10-25 11:41 GMT+02:00 Nyall Dawson <nyall.dawson at gmail.com>:
>
>> On 25 Oct 2016 7:37 PM, "Geo DrinX" <geodrinx at gmail.com> wrote:
>> >
>> > Good morning,
>> >
>> >
>> > we have seen that the new QGIS 2.18  reports a warning when opens a
>> .qgs  project file,
>> > reporting that it is an old version, and saving again, it could be
>> incompatible with old versions of QGIS.
>> >
>> > We  are asking what is the reason for this.  Could you explain us ?
>>
>> There's no backward compatibility in qgs files. If you upgrade them then
>> they won't necessarily be the same in earlier versions. Sometimes they
>> won't be openable at all in earlier versions. Hence the warning.
>>
>> This is not a new feature. It has always been the case when you open a
> project with a newer qgis version.
>


Oh yes, it's true !    You are right.   I tested.     :(

So I am asking: what is the reason why we did this  ?

What you call "feature" is a problem for all those who need to share data
with users who have an older version of QGIS, for one reason or another.

I am wrong ?   What do you think ?

Regards
Geo




> Regards,
> Harrissou
>
>> >
>> > BTW, there is a function for saving the .qgs  file  in a previous
>> version ?
>>
>> No, nothing like that exists.
>>
>> Nyall
>>
>> >
>> >
>> > Thank you
>> >
>> > Geo
>> >
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