SVG rotate text with % as Unit - svg

Question

I try to rotate a svg text. i get the position of the text as % i.e. 15% by calling a php function from xslt. the problem is that i can not rotate a svg object using %. it works if i use a digit number instead.
Below i present the problem as simplified:
<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ev="http://ww.w3.org/2001/xml-events" xmlns:php="http://php.net/xsl" version="1.1" baseProfile="full">
<text x="50%" y="50%" transform="rotate(-90 50% 50%)">rotateMe</text>
<line x1="50%" y1="47%" x2="60%" y2="47%" stroke="black" stroke-width="2px"/>
</svg>
this pic is in the middle of my browser screen
And i want that it looks like this:
but it dont work because of %
transform="rotate(-90 **50% 50%**)"
it is a requirement for me to use % for the coordinates. Any ideas or solution to my problem?
Thank you in advanced.

Answer 1

You can translate the co-ordinates using an inner <svg> element. The example below displays as per your "i want that it looks like this" bitmap on Firefox.
If you can't see the text on whatever browser you are using, try adding overflow="visible" to the inner <svg> element so you can see where it ends up. Not all browsers support the dominant-baseline attribute so you may need to fiddle about with the text's y attribute instead.
<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<svg x="50%" y="50%" width="100" height="100">
<text text-anchor="end" dominant-baseline="text-before-edge" transform="rotate(-90 0 0)">rotateMe</text>
</svg>
<line x1="50%" y1="47%" x2="60%" y2="47%" stroke="black" stroke-width="2px"/>
</svg>