Glich Script Language Extension Hics
This extension adds the ability to define and manipulate a number of calendar schemes.
It adds four statements: scheme, grammar, format and lexicon to define a calendar scheme. It also adds a number of functions: @text, @date, @scheme and @phrase to convert between different representation of a date and another: @element, to convert between representation of an element of a date.
The context setting hics can be used to set the literal field values of +infinity and -infinity to future and past respectively.
