<https://www.rippletraining.com/plugins-support/callouts-help-docs/attachment/rt2_working-with-the-box-corner-point-callout-2/#primaryimage>
<http://schema.org/width>
"600"^^<http://www.w3.org/2001/XMLSchema#integer>
<https://www.rippletraining.com/plugins-support/callouts-help-docs/attachment/rt2_working-with-the-box-corner-point-callout-2/>