Relative Layout XConstraint & YConstraint Vs. WidthConstraint & HeightConstraint in Xamarin.Forms

Question

What's the difference between XConstraint and WidthConstraint or YConstraint and HeightConstraint when using Relative layout in Xamarin.Forms?
It seems like they both serve the same purpose and they can be used interchangeably. Here's an example from Microsoft's documentation.

<RelativeLayout>
<BoxView Color="Red" x:Name="redBox"
    RelativeLayout.YConstraint="{ConstraintExpression Type=RelativeToParent,
        Property=Height,Factor=.15,Constant=0}"
    RelativeLayout.WidthConstraint="{ConstraintExpression
        Type=RelativeToParent,Property=Width,Factor=1,Constant=0}"
    RelativeLayout.HeightConstraint="{ConstraintExpression
        Type=RelativeToParent,Property=Height,Factor=.8,Constant=0}" />

<BoxView Color="Blue"
    RelativeLayout.YConstraint="{ConstraintExpression Type=RelativeToView,
        ElementName=redBox,Property=Y,Factor=1,Constant=20}"
    RelativeLayout.XConstraint="{ConstraintExpression Type=RelativeToView,
        ElementName=redBox,Property=X,Factor=1,Constant=20}"
    RelativeLayout.WidthConstraint="{ConstraintExpression
        Type=RelativeToParent,Property=Width,Factor=.5,Constant=0}"
    RelativeLayout.HeightConstraint="{ConstraintExpression
        Type=RelativeToParent,Property=Height,Factor=.5,Constant=0}" />
</RelativeLayout>

Answer 1

No, they are different.

XConstraint – decide the x (horizontal) position of the view's anchor

YConstraint – decide the y (vertical) position of the view's anchor

WidthConstraint – decide the width of the view

HeightConstraint – decide the height of the view

Each of those values are set as a proportional value in RelativeLayout.