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

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

void BehaviourElement::render?Usage of BehaviourElement::render:
Index File Services - §11(OUTPUT_STREAM) {
    inter_tree *I = Index::get_tree();
    tree_inventory *inv = Synoptic::inv(I);

    int num_naps = TreeLists::len(inv->named_action_pattern_nodes);

    if (num_naps == 0) {
        HTML_OPEN("p");
        WRITE("No names for kinds of action have yet been defined.");
        HTML_CLOSE("p");
    } else {
        TreeLists::sort(inv->named_action_pattern_nodes, Synoptic::module_order);
        for (int i=0; i<TreeLists::len(inv->named_action_pattern_nodes); i++) {
            inter_package *pack = Inter::Package::defined_by_frame(inv->named_action_pattern_nodes->list[i].node);
            text_stream *name = Metadata::read_optional_textual(pack, I"^name");
            int at = (int) Metadata::read_optional_numeric(pack, I"^at");
            HTML_OPEN("p"); WRITE("<b>%S</b>", name);
            Index::link(OUT, at);
            HTML_TAG("br");
            WRITE("&nbsp;&nbsp;<i>defined as any of the following acts:</i>\n");
            inter_tree_node *D = Inter::Packages::definition(pack);
            LOOP_THROUGH_INTER_CHILDREN(C, D) {
                if (C->W.data[ID_IFLD] == PACKAGE_IST) {
                    inter_package *entry = Inter::Package::defined_by_frame(C);
                    if (Inter::Packages::type(entry) == PackageTypes::get(I, I"_named_action_pattern_entry")) {
                        text_stream *text = Metadata::read_optional_textual(entry, I"^text");
                        HTML_TAG("br");
                        WRITE("&nbsp;&nbsp;&nbsp;&nbsp;%S", text);
                        int at = (int) Metadata::read_optional_numeric(entry, I"^at");
                        Index::link(OUT, at);
                    }
                }
            }
            HTML_CLOSE("p");
        }
    }
}