Returns the numerical prefix used at the beginning of the title of a SPIP object (article, section, author, keyword...)
Reminder: Prefixes are generally used to classify objects between them. For example, to classify articles in a prescribed order, their titles can be numbered in the private area by a number followed by a period and a space: "10. First article", "20. Second article", etc.
Example of using the #RANG tag:
to display in a list only those sections whose prefix exists and is greater than or equal to 100:
<B_menu>
<ul>
<BOUCLE_menu(RUBRIQUES) {par num titre} {titre==^[0-9]+[.][[:space:]]}>
[(#RANG|>={100}|oui)<li><a href="#URL_RUBRIQUE">#TITRE</a></li>]
</BOUCLE_menu>
</ul>
</B_menu>