There are some pretty sweet posts on how to do this here:
- http://anujabhojani.blogspot.com/2013/02/sharepoint-2013-termset-with-powershell.html
- http://anujabhojani.blogspot.com/2013/02/sharepoint-2013-taxonomy-import-using.html
This biggest piece of it is that everything is done via the property bag of a term set and terms. You just need to know what the property names are, which include:
-
_Sys_Nav_SimpleLinkUrl
-
_Sys_Nav_TargetUrl
-
_Sys_Nav_IsNavigationTermSet
-
_Sys_Facet_IsFactedTermSet
-
_Sys_Nav_AttachedWeb_SiteId
-
_Sys_Nav_AttachedWeb_WebId
-
_Sys_Nav_AttachedWeb_OriginalUrl
Chris