[Qgis-developer] About project.qgs file versions

[Geo DrinX]

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 ?

BTW, there is a function for saving the .qgs  file  in a previous version ?


Thank you

Geo
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