tcatm/ffmap-backend — pull request #2 by johnyb (2012-10-02 22:34:10+00:00)
Title: make ids svg friendly

The id attribute is used as an id for an svg element. W3C states, these
ids must not start with a number (hence a prefix is added) and must
not contain colons.

The advantage of this is, that nodes in a document containing elements
with these ids can be selected using their id with CSS selectors.
This is not possible within the current map.