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An important facet of our conversational agent is the visual support. While the way in which visuals are modelled in the agent may look complicated, there is nothing that goes far beyond basic HTML. We utilize a combination of Prolog, HTML and Bootstrap to generate dynamic webpages. Prolog rules are used to add a condition to a webpage (i.e. webpage X is shown when Clause Y is true). By means of these Prolog rules, we generate our HTML code. The HTML code is treated as a Prolog atom, essentially a string, that we manipulate with Prolog and generate with the rule. The HTML code is represented in Bootstrap format, which is also clearly illustrated by examples below or on Bootstrap's documentation website (Bootstrap Documentation).
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Prolog Advice: To manipulate strings and atoms in Prolog it is useful to look at documentation of the following built-in functions: atomic_list_concat, atom_concat, string_concat, append, and maplist here: https://www.swi-prolog.org/. The predicate applyTemplate is a defined predicate that will be explained below. |
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