{% import 'includes/filters/filter-variables.j2' as vars %}
{% with key='Explode-data-filter' %}{% include "includes/help.html" %}{% endwith %}
Normalise data from "wide" to "narrow" using the headers as labels. This filter
uses the special +label attribute to identify columns.
{% include 'includes/filters/label-field.html' %}
{% set name='explode-header-att%02d' % n %}