[custom-shapes] ext_attribute feature, cannot understand.

[tom thomas-harding name (Thomas Harding)]

Hello,
I tried several solutions, but nothing seems work,
except I can fill property in the properties dialogs,
and changes are saved.

Here is the last sample:

[...]
<aspectratio type="fixed"/>
<ext_attributes>
  <ext_attribute name="ext_border_color" type="int" />
  <ext_attribute name="ext-border-width" type="int" />
  <ext_attribute name="csstyle" type="string">
    fill:none;
    stroke:fg;
    stroke-width:8;
    stroke-linecap:round;
    stroke-linejoin:round
  </ext_attribute>
</ext_attributes>
<svg:svg
 [...]

  <svg:path
     d="M 299.97011,1372.2053 C 396.78331,1440.7114
       457.34331,1488.2979 568.47451,1519.4418"
     style="custom:csstyle"
     id="path7572" />
</svg:svg>
<connections>
[...]

What do I miss?

-- 
Thomas Harding.