Install libpetal-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libpetal-perl
Perl Template Attribute Language - TAL for perl
Petal is an XML based templating engine that is able to process any kind of XML, XHTML and HTML. . Petal borrows a lot of good ideas from the Zope Page Templates TAL specification, it is very well suited for the creation of WYSIWYG XHTML editable templates.