To write the Behaviour element (Bh) in the index.

§1. This simply itemises kinds of action, and what defines them.

void BehaviourElement::render?Usage of BehaviourElement::render:
The Periodic Table - §4(OUTPUT_STREAM, index_session *session) {
    localisation_dictionary *LD = Indexing::get_localisation(session);
    inter_tree *I = Indexing::get_tree(session);
    tree_inventory *inv = Indexing::get_inventory(session);

    int num_naps = InterNodeList::array_len(inv->named_action_pattern_nodes);

    if (num_naps == 0) {
        HTML_OPEN("p");
        Localisation::roman(OUT, LD, I"Index.Elements.Bh.None");
        HTML_CLOSE("p");
    } else {
        InterNodeList::array_sort(inv->named_action_pattern_nodes, MakeSynopticModuleStage::module_order);
        inter_package *pack;
        LOOP_OVER_INVENTORY_PACKAGES(pack, i, inv->named_action_pattern_nodes) {
            text_stream *name = Metadata::optional_textual(pack, I"^name");
            HTML_OPEN("p"); WRITE("<b>%S</b>", name);
            IndexUtilities::link_package(OUT, pack);
            HTML_TAG("br");
            WRITE("&nbsp;&nbsp;");
            Localisation::italic(OUT, LD, I"Index.Elements.Bh.Defined");
            inter_tree_node *D = InterPackage::head(pack);
            LOOP_THROUGH_INTER_CHILDREN(C, D) {
                if (Inode::is(C, PACKAGE_IST)) {
                    inter_package *entry = PackageInstruction::at_this_head(C);
                    if (InterPackage::type(entry) ==
                        LargeScale::package_type(I, I"_named_action_pattern_entry")) {
                        text_stream *text = Metadata::optional_textual(entry, I"^text");
                        HTML_TAG("br");
                        WRITE("&nbsp;&nbsp;&nbsp;&nbsp;%S", text);
                        IndexUtilities::link_package(OUT, entry);
                    }
                }
            }
            HTML_CLOSE("p");
        }
    }
}