I have also tried
/******/
Item {
    id: myMapItem

    property var coordinate
    property alias latitude: coordinate.latitude
    property alias longitude: coordinate.longitude
    property alias altitude: coordinate.altitude
}
/******/

In the above case which works (I think), I do not understand how to declare 
the aliases.
--
Cheers!
Kishore

On Monday 26 September 2016 4:11:03 PM IST Kishore Jonnalagadda wrote:
> I have created an custom Item in which I want to have a coordinate property.
> Further i want to create aliases to the coordinates properties. How do i go
> about this?
> 
> Example:
> 
> /******/
> Item {
>       id: myCustomItem
> 
>       property coordinate coordinate
>       property alias latitude: coordinate.latitude
>       property alias longitude: coordinate.longitude
>       property alias altitude: coordinate.altitude
> }
> /******/
> 
> I have also tried the following format...
> 
> /******/
> Item {
>     id: myCustomItem
> 
>     property alias coordinate: coordinate
>     property alias latitude: coordinate.latitude
>     property alias longitude: coordinate.longitude
>     property alias altitude: coordinate.altitude
> 
>     Coordinate {id: coordinate}
> }
> /******/
> 
> But for some reason, the second form results in a segmentation fault.


-- 
Cheers!
Kishore
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