Using RCC, you can specify how a given foreign-namespaced element should behave in an SVG document.
使用 RCC，您可以规定给出的外部名称空间元素在 SVG 文档中的行为。
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Another thing worth noting is that the contents of a element are not limited to good old SVG graphics elements, but can also include RCC-defined custom elements too.
另外值得一提的是，元素的内容不仅可以是老的svg图形元素，还可以包括RCC定义的定制元素。
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Basically, RCC is a binding mechanism that matches a non-SVG XML element to an SVG tree.