Template Tags are of form {{value:type}}.
value can be any thing like "phone", "full name",
"address", etc. type is the type of value like number,
text, date, etc. (all html input types are supported).
Some of the examples are {{full name : text}}
{{roll : number}}, {{deadline : date}} the
default type is text and hence mentioning it is optional. eg:
{{full name}}