Big thanks goes to:
The former authors of PHPTal: Laurent Bédubourg, Kornel Lesiński, Dan Sheppard, Anton Valeriyevich Andriyevskyy
ZPT team, who made these useful specifications,
The PHPTAL community for their support, help and reports,
Jean-Michel Hiver, who 'forced' me to look at them,
Olivier Parisy, the first enthusiastic PHPTAL user and bug finder,