The object of this infusion is to organize article categories and articles in a hierarchy: Make it possible for article categories to have subcategories and for articles to have subarticles, and to make it possible for you to get full control over the sequence in which categories and articles shall be shown when you press the link 'Articles hierarchal'.

To this purpose there will be added two columns each to the database tabels prefix_articles and article_cats. One is to contain the id of the parent, another to contain the sequential number that you decide to give the category/article.