Node type: Block element (can contain only other elements)
Whitespace: Not protected
Contains content that is associated with a subArticle, but is not displayed inline within the main body of the subArticle, such as a sidebar.
= Optional element or attribute
<resources>
<figureBlockRef fileIDref="32489_000_fig1"/>
</resources>
Inferred from <popContentGroup> (use the popPara paragraph style). If any other elements are included, enter beginning and ending <resources> tags using the xmlPara paragraph style.