{% macro class_link(cls) -%}
<a href="{{ cls.href }}"><code>{{ cls.name }}</code></a>{% if cls.abstract %} <span class="abstract-badge" title="Abstract: only its subtypes have instances">abstract</span>{% endif %}
{%- endmacro %}

{% macro attribution(tm) -%}
<p class="tm-attribution">From the <a href="{{ tm.base_url }}index.htm" rel="noopener noreferrer">Transmodel {{ tm.version }}</a> UML model published by CEN. Names, definitions and relationships are taken unchanged from its <a href="{{ tm.source }}" rel="noopener noreferrer">Enterprise Architect export</a> (read {{ tm.extracted }}). Diagrams are EA's own images from transmodel-cen.eu; the neighbourhood drawings on class pages are made with Graphviz.</p>
{%- endmacro %}