Comment 1 for bug 170921

It is part of a draft of SVG 1.2. Lately the W3C seems to
have decided to change that part of 1.2 using different
element names and semantics. Until a new draft is available,
we will be using flowRoot. When the final spec is out, we
will switch to it. I don't think we need to remove flowRoot
into a different namespace, simply because svg:flowRoot is
documented at least in an obsolete W3C draft and has been
implemented by some other SVG software already, whereas
inkscape:flowRoot is not documented anywhere.

For guaranteed rendering, convert flowed text to path or to
text before saving.