How do I merge two SVG files?

[martinfrandsen]

I got a svg template, which I wish to add a generated QR code to.
I can save the QR code as SVG file, and I can create a copy of the template, but I can't merge the two svg's together.

I thought it was as simple as taking the children from the QR code document and adding them to a SvgElement from the template, which I found using the "GetElementById" method.

[H1Gdev]

1. Get element with GetElementById.
2. Get Children.
3. Add element with Add.