This library supports declaring DCG rules that process HTML terms. It supports the cross-referencer as well as syntax highlighting that is based on library(prolog_colour).

 html_meta +Heads is det

This directive can be used to declare that an HTML rendering rule takes HTML content as argument. It has two effects. It emits the appropriate meta_predicate/1 and instructs the built-in editor (PceEmacs) to provide proper colouring for the arguments. The arguments in Head are the same as for meta_predicate or can be constant html. For example:

:- html_meta
    page(html,html,?,?).

 html_no_content(?Element)

True when Element has no content.