Just to let someone know:
The TOC numbers in the TANGO Device Server Guidelines (pdf) linked from the Resources/Documentation page is incorrect. E.g. par 1.13.2 in the TOC jumps to the correct paragraph in the text with the same name, but it is listed there as 1.14.2.

http://sourceforge.net/projects/tango-cs/files/doc/TangoDesignGuidelines-Revision-6.pdf/download