6b6301ce_2_of_2____Ingo_Karstein_s_Blog__Description
[Parameter Name] MajorVersion [Parameter Set Name] DefaultSite [Mandatory?] No [Position] - [Description] 
Version number of the design package. If not specified it uses “1” for the major version.
SharePoint 2013 Design Packages: Import with PowerShell (Part 2 of 2) | Ingo Karstein's Blog
Description